Input validation error - CVE-2011-4317

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Main Vulnerability Database Vulnerabilities #VU33695

Input validation error - CVE-2011-4317

Published: November 30, 2011 / Updated: August 4, 2020


Vulnerability identifier: #VU33695
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-4317
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21, when the Revision 1179239 patch is in place, does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an @ (at sign) character and a : (colon) character in invalid positions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.


Affected software

apache2 (Alpine package)
HP OpenView Network Node Manager
Slackware Linux

How to mitigate CVE-2011-4317

Install update from vendor's website.

apache2 (Alpine package) - update to 2.2.21-r1

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins