Skip to navigation

CVE Database

CVE-2011-4317

Impact: Moderate
Public: 2011-11-23
Bugzilla: 756483: CVE-2011-4317 httpd: uri scheme bypass of the reverse proxy vulnerability CVE-2011-3368 fix

Details

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-4317 from the MITRE CVE dictionary and NIST NVD.

Statement

This issue did not affect the versions of httpd as shipped with Red Hat Enterprise Linux 4 and 5 due to differences in apr-util's apr_uri_parse() implementation.

CVSS v2 metrics

Base Score: 2.6
Base Metrics: AV:N/AC:H/Au:N/C:N/I:P/A:N
Access Vector: Network
Access Complexity: High
Authentication: None
Confidentiality Impact: None
Integrity Impact: Partial
Availability Impact: None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (httpd) RHSA-2012:0128 February 13, 2012

External References

https://community.qualys.com/blogs/securitylabs/2011/11/23/apache-reverse-proxy-bypass-issue

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.