Medium: httpd

Issue Overview:

It was discovered that the Apache HTTP Server did not properly validate the request URI for proxied requests. In certain configurations, if a reverse proxy used the ProxyPassMatch directive, or if it used the RewriteRule directive with the proxy flag, a remote attacker could make the proxy connect to an arbitrary server, possibly disclosing sensitive information from internal web servers not directly accessible to the attacker. (CVE-2011-3368)

It was discovered that mod_proxy_ajp incorrectly returned an “Internal Server Error” response when processing certain malformed HTTP requests, which caused the back-end server to be marked as failed in configurations where mod_proxy was used in load balancer mode. A remote attacker could cause mod_proxy to not send requests to back-end AJP (Apache JServ Protocol) servers for the retry timeout period or until all back-end servers were marked as failed. (CVE-2011-3348)

Affected Packages:

httpd

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

New Packages:

i686:  
    httpd-devel-2.2.21-1.19.amzn1.i686  
    httpd-tools-2.2.21-1.19.amzn1.i686  
    httpd-2.2.21-1.19.amzn1.i686  
    mod_ssl-2.2.21-1.19.amzn1.i686  
    httpd-debuginfo-2.2.21-1.19.amzn1.i686  
  
noarch:  
    httpd-manual-2.2.21-1.19.amzn1.noarch  
  
src:  
    httpd-2.2.21-1.19.amzn1.src  
  
x86_64:  
    mod_ssl-2.2.21-1.19.amzn1.x86_64  
    httpd-debuginfo-2.2.21-1.19.amzn1.x86_64  
    httpd-tools-2.2.21-1.19.amzn1.x86_64  
    httpd-devel-2.2.21-1.19.amzn1.x86_64  
    httpd-2.2.21-1.19.amzn1.x86_64  

Additional References

Red Hat: CVE-2011-3348, CVE-2011-3368

Mitre: CVE-2011-3348, CVE-2011-3368