Scientific Linux: 2007-11-15 Moderate: httpd Denial Of Service

Date:         Thu, 15 Nov 2007 14:11:41 -0600
Reply-To:     Troy Dawson 
Sender:       Security Errata for Scientific Linux
              
From:         Troy Dawson 
Subject:      Security ERRATA for httpd on SL4.x i386/x86_64
Comments: To: This email address is being protected from spambots. You need JavaScript enabled to view it.

Synopsis:	Moderate: httpd security, bug fix, and enhancement update
Issue date:	2007-11-15
CVE Names:	CVE-2007-3847

A flaw was found in the Apache HTTP Server mod_proxy module. On sites where
a reverse proxy is configured, a remote attacker could send a carefully
crafted request that would cause the Apache child process handling that
request to crash. On sites where a forward proxy is configured, an attacker
could cause a similar crash if a user could be persuaded to visit a
malicious site using the proxy. This could lead to a denial of service if
using a threaded Multi-Processing Module. (CVE-2007-3847)

As well, these updated packages fix the following bugs:

* the default "/etc/logrotate.d/httpd" script incorrectly invoked the kill
command, instead of using the "/sbin/service httpd restart" command. If you
configured the httpd PID to be in a location other than
"/var/run/httpd.pid", the httpd logs failed to be rotated. This has been
resolved in these updated packages.

* Set-Cookie headers with a status code of 3xx are not forwarded to
clients when the "ProxyErrorOverride" directive is enabled. These
responses are overridden at the proxy. Only the responses with status
codes of 4xx and 5xx are overridden in these updated packages.

* mod_proxy did not correctly handle percent-encoded characters (ie %20)
when configured as a reverse proxy.

* invalid HTTP status codes could be logged if output filters returned
errors.

* the "ProxyTimeout" directive was not inherited across virtual host
definitions.

* 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 

This update adds the following enhancements:

* a new configuration option has been added, "ServerTokens Full-Release",
which adds the package release to the server version string, which is
returned in the "Server" response header.

* a new module has been added, mod_version, which allows configuration
files to be written containing sections, which are evaluated only if the
version of httpd used matches a specified condition.

SL 4.x

   SRPMS:
httpd-2.0.52-38.sl4.src.rpm
   i386:
httpd-2.0.52-38.sl4.i386.rpm
httpd-devel-2.0.52-38.sl4.i386.rpm
httpd-manual-2.0.52-38.sl4.i386.rpm
httpd-suexec-2.0.52-38.sl4.i386.rpm
mod_ssl-2.0.52-38.sl4.i386.rpm
   x86_64:
httpd-2.0.52-38.sl4.x86_64.rpm
httpd-devel-2.0.52-38.sl4.x86_64.rpm
httpd-manual-2.0.52-38.sl4.x86_64.rpm
httpd-suexec-2.0.52-38.sl4.x86_64.rpm
mod_ssl-2.0.52-38.sl4.x86_64.rpm

-Connie Sieh
-Troy Dawson