CVE-2011-3639

Description

The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, 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 by using the HTTP/0.9 protocol with a malformed URI containing an initial @ (at sign) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.

References

Link	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=752080
http://rhn.redhat.com/errata/RHSA-2012-0128.html	vendor advisory
http://svn.apache.org/viewvc?view=revision&revision=1188745
http://www.debian.org/security/2012/dsa-2405	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2011-3639?: CVE-2011-3639 has been scored as a medium severity vulnerability.
How to fix CVE-2011-3639?: To fix CVE-2011-3639, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-3639 being actively exploited in the wild?: It is possible that CVE-2011-3639 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.

Description

Category

CWE-20 – Improper Input Validation

References

Frequently Asked Questions