CVE-2011-3639: Input Validation
SUSE reported that upstream patch for CVE-2011-3368 (bug #740045), when applied to httpd versions before 2.2.18, does not completely address the issue, when attacker sends HTTP 0.9 requests::
https://bugzilla.novell.com/showbug.cgi?id=722545#c15 http://thread.gmane.org/gmane.comp.apache.devel/45978 http://thread.gmane.org/gmane.comp.security.oss.general/6102
The fix has been created upstream and committed to trunk:
http://thread.gmane.org/gmane.comp.apache.devel/45978/focus=45979 http://svn.apache.org/viewvc?view=revision&revision=1188745
Upstream also confirmed this additional fix is not required for httpd versions 2.2.18 and later:
http://thread.gmane.org/gmane.comp.apache.devel/45978/focus=45983 http://thread.gmane.org/gmane.comp.apache.devel/45978/focus=45985
Other sources
The modproxy 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.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2011-3639?
The severity of CVE-2011-3639 is classified as moderate.
How do I fix CVE-2011-3639?
To fix CVE-2011-3639, upgrade to a version of Apache HTTP Server that is not affected, specifically versions greater than 2.2.11.
Which versions of Apache HTTP Server are affected by CVE-2011-3639?
CVE-2011-3639 affects Apache HTTP Server versions 2.0.11 through 2.2.11.
What type of vulnerability is CVE-2011-3639?
CVE-2011-3639 is an integer overflow vulnerability in Apache HTTP Server.
Is there a patch available for CVE-2011-3639?
Yes, a patch for CVE-2011-3639 is available as part of Apache HTTP Server's updates.