Scientific Linux Security Update : httpd on SL6.x i386/x86_64

Medium Nessus Plugin ID 61161


The remote Scientific Linux host is missing one or more security updates.


The Apache HTTP Server is a popular web server.

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)

This update also fixes the following bug :

- The fix for CVE-2011-3192 provided by a previous update introduced regressions in the way httpd handled certain Range HTTP header values. This update corrects those regressions.

All httpd users should upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 61161

File Name: sl_20111020_httpd_on_SL6_x.nasl

Version: $Revision: 1.7 $

Type: local

Agent: unix

Published: 2012/08/01

Modified: 2015/01/13

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2011/10/20

Reference Information

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