Medium: httpd

Issue Overview:

It was discovered that the fix for CVE-2011-3368 did not completely address the problem. An attacker could bypass the fix and make a reverse proxy connect to an arbitrary server not directly accessible to the attacker by sending an HTTP version 0.9 request, or by using a specially-crafted URI. (CVE-2011-3639, CVE-2011-4317)

The httpd server included the full HTTP header line in the default error page generated when receiving an excessively long or malformed header. Malicious JavaScript running in the server’s domain context could use this flaw to gain access to httpOnly cookies. (CVE-2012-0053)

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way httpd performed substitutions in regular expressions. An attacker able to set certain httpd settings, such as a user permitted to override the httpd configuration for a specific directory using a “.htaccess” file, could use this flaw to crash the httpd child process or, possibly, execute arbitrary code with the privileges of the “apache” user. (CVE-2011-3607)

A flaw was found in the way httpd handled child process status information. A malicious program running with httpd child process privileges (such as a PHP or CGI script) could use this flaw to cause the parent httpd process to crash during httpd service shutdown. (CVE-2012-0031)

Affected Packages:

httpd

Issue Correction:
Run yum update httpd to update your system.

New Packages:

i686:  
    httpd-debuginfo-2.2.22-1.23.amzn1.i686  
    mod_ssl-2.2.22-1.23.amzn1.i686  
    httpd-devel-2.2.22-1.23.amzn1.i686  
    httpd-2.2.22-1.23.amzn1.i686  
    httpd-tools-2.2.22-1.23.amzn1.i686  
  
noarch:  
    httpd-manual-2.2.22-1.23.amzn1.noarch  
  
src:  
    httpd-2.2.22-1.23.amzn1.src  
  
x86_64:  
    httpd-2.2.22-1.23.amzn1.x86_64  
    httpd-devel-2.2.22-1.23.amzn1.x86_64  
    httpd-debuginfo-2.2.22-1.23.amzn1.x86_64  
    mod_ssl-2.2.22-1.23.amzn1.x86_64  
    httpd-tools-2.2.22-1.23.amzn1.x86_64  

Additional References

Red Hat: CVE-2011-3607, CVE-2011-3639, CVE-2012-0031, CVE-2012-0053

Mitre: CVE-2011-3607, CVE-2011-3639, CVE-2012-0031, CVE-2012-0053