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CVE-2011-4317

Publication date 29 November 2011

Last updated 24 July 2024


Ubuntu priority

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
apache2 11.10 oneiric
Fixed 2.2.20-1ubuntu1.2
11.04 natty
Fixed 2.2.17-1ubuntu1.5
10.10 maverick
Fixed 2.2.16-1ubuntu3.5
10.04 LTS lucid
Fixed 2.2.14-5ubuntu8.8
8.04 LTS hardy
Fixed 2.2.8-1ubuntu0.23

Notes


mdeslaur

the following commit introduces the apr_uri functionnality required for the vulnerability to work: http://svn.apache.org/viewvc?view=revision&revision=594624

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

References

Related Ubuntu Security Notices (USN)

    • USN-1368-1
    • Apache HTTP Server vulnerabilities
    • 16 February 2012

Other references