9.8

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2016-6795

CVE-2016-6795: Path Traversal in Apache Struts

In Apache Struts 2.3.x before 2.3.31, and 2.5.x before 2.5.5, it is possible to prepare a special URL which will be used for path traversal and execution of arbitrary code on server side. This vulnerability is only exploitable when using the Struts 2 Convention plugin in conjunction with Apache Struts.

(GitHub Advisory)

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CVE-2016-6795

CVE-2016-6795:

9.8

CVSS Score

3.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.apache.struts:struts2-convention-plugin	maven	>= 2.3.0, < 2.3.31	2.3.31
org.apache.struts:struts2-convention-plugin	maven	>= 2.5.0, < 2.5.5	2.5.5

Technical Details

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Root Cause Analysis

The vulnerability stems from insufficient path validation in the ConventionUnknownHandler's resource lookup logic. The original code in findResult() checked only if a resource exists (via servletContext.getResource() and ClassLoaderUtil.getResource()), but did not verify if the resolved resource's actual path matched the requested path. This allowed crafted URLs with '../' sequences to access arbitrary resources. The patch introduced an additional check (resource.getPath().endsWith(path)), which directly addresses this flaw. The function's role in mapping URLs to resources and the specific nature of the vulnerability (path traversal via Convention plugin) make this the clear entry point for exploitation.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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