Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Http Server | 2.0.11 |
| Apache | Http Server2.0A1 | All versions |
| Apache | Http Server2.0A2 | All versions |
| Apache | Http Server2.0A3 | All versions |
| Apache | Http Server2.0A4 | All versions |
| Apache | Http Server2.0A5 | All versions |
| Apache | Http Server2.0A6 | All versions |
| Apache | Http Server2.0A7 | All versions |
| Apache | Http Server2.0A8 | All versions |
| Apache | Http Server2.0A9 | All versions |
Related Weaknesses (CWE)
References
- http://rhn.redhat.com/errata/RHSA-2012-0128.html
- http://svn.apache.org/viewvc?view=revision&revision=1188745
- http://www.debian.org/security/2012/dsa-2405
- https://bugzilla.redhat.com/show_bug.cgi?id=752080
- http://rhn.redhat.com/errata/RHSA-2012-0128.html
- http://svn.apache.org/viewvc?view=revision&revision=1188745
- http://www.debian.org/security/2012/dsa-2405
- https://bugzilla.redhat.com/show_bug.cgi?id=752080
FAQ
What is CVE-2011-3639?
CVE-2011-3639 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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)...
How severe is CVE-2011-3639?
CVE-2011-3639 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-3639?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Http Server, Apache Http Server2.0A1, Apache Http Server2.0A2, Apache Http Server2.0A3, Apache Http Server2.0A4.