Scientific Linux Security Update : httpd on SL3.x i386/x86_64
Critical Nessus Plugin ID 60636
SynopsisThe remote Scientific Linux host is missing one or more security updates.
DescriptionCVE-2009-1891 httpd: possible temporary DoS (CPU consumption) in mod_deflate
CVE-2009-2412 apr, apr-util: Integer overflows in memory pool (apr) and relocatable memory (apr-util) management
Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way the Apache Portable Runtime (APR) manages memory pool and relocatable memory allocations. An attacker could use these flaws to issue a specially crafted request for memory allocation, which would lead to a denial of service (application crash) or, potentially, execute arbitrary code with the privileges of an application using the APR libraries. (CVE-2009-2412)
A denial of service flaw was found in the Apache mod_deflate module.
This module continued to compress large files until compression was complete, even if the network connection that requested the content was closed before compression completed. This would cause mod_deflate to consume large amounts of CPU if mod_deflate was enabled for a large file. (CVE-2009-1891)
This update also fixes the following bug :
- in some cases the Content-Length header was dropped from HEAD responses. This resulted in certain sites not working correctly with mod_proxy, such as www.windowsupdate.com. (BZ#506016)
After installing the updated packages, the httpd daemon must be restarted for the update to take effect.
SolutionUpdate the affected httpd, httpd-devel and / or mod_ssl packages.