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AUSCERT External Security Bulletin Redistribution
Moderate: httpd security and bug fix update
31 August 2010
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2010-2791 CVE-2010-1452
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Red Hat Security Advisory
Synopsis: Moderate: httpd security and bug fix update
Advisory ID: RHSA-2010:0659-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0659.html
Issue date: 2010-08-30
CVE Names: CVE-2010-1452 CVE-2010-2791
Updated httpd packages that fix two security issues and multiple bugs are
now available for Red Hat Enterprise Linux 5.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
2. Relevant releases/architectures:
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
The Apache HTTP Server is a popular web server.
A flaw was discovered in the way the mod_proxy module of the Apache HTTP
Server handled the timeouts of requests forwarded by a reverse proxy to the
back-end server. If the proxy was configured to reuse existing back-end
connections, it could return a response intended for another user under
certain timeout conditions, possibly leading to information disclosure.
A flaw was found in the way the mod_dav module of the Apache HTTP Server
handled certain requests. If a remote attacker were to send a carefully
crafted request to the server, it could cause the httpd child process to
This update also fixes the following bugs:
* numerous issues in the INFLATE filter provided by mod_deflate. "Inflate
error -5 on flush" errors may have been logged. This update upgrades
mod_deflate to the newer upstream version from Apache HTTP Server 2.2.15.
* the response would be corrupted if mod_filter applied the DEFLATE filter
to a resource requiring a subrequest with an internal redirect. (BZ#625451)
* the OID() function used in the mod_ssl "SSLRequire" directive did not
correctly evaluate extensions of an unknown type. (BZ#625452)
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.
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
617523 - CVE-2010-2791 httpd: Reverse proxy sends wrong responses after time-outs
618189 - CVE-2010-1452 httpd mod_cache, mod_dav: DoS (httpd child process crash) by parsing URI structure with missing path segments
625435 - mod_deflate/mod_proxy generating 'Inflate error -5 on flush' errors
625451 - [APACHE BUG] filter handling issues with subrequests and internal redirects
625452 - mod_ssl: Further fix for SSLRequire OID() function
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
RHEL Desktop Workstation (v. 5 client):
Red Hat Enterprise Linux (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2010 Red Hat, Inc.
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