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

Show unmaintained releases

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	Upstream: http://svn.apache.org/viewvc?view=revision&revision=1235443

References

Related Ubuntu Security Notices (USN)