RHSA-2006:0045 - Security Advisory

Topic

Updated squid packages that fix a security vulnerability as well as
several bugs are now available.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

Description

Squid is a high-performance proxy caching server for Web clients,
supporting FTP, gopher, and HTTP data objects.

A denial of service flaw was found in the way squid processes certain NTLM
authentication requests. A remote attacker could send a specially crafted
NTLM authentication request which would cause the Squid server to crash.
The Common Vulnerabilities and Exposures project assigned the name
CVE-2005-2917 to this issue.

Several bugs have also been addressed in this update:

• An error introduced in 2.5.STABLE3-6.3E.14 where Squid can crash if a

user visits a site which has a long DNS record.

• Some authentication helpers were missing needed setuid rights.
• Squid couldn't handle a reply from a HTTP server when the reply began

with the new-line character or wasn't HTTP/1.0 or HTTP/1.1 compliant.

• User-defined error pages were not kept when the squid package was upgraded.

All users of squid should upgrade to these updated packages, which contain
backported patches to resolve these issues.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

Affected Products

• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 127836 - Error pages should not be replaced by updates
• BZ - 150781 - Squid doesn't handle headers split across packets
• BZ - 163595 - Squid blocks page served by broken server
• BZ - 165367 - Squid dies with signal 6 and restarts and dies ...
• BZ - 169269 - Error in script /usr/lib/squid/wbinfo_group.pl
• BZ - 170397 - pam authentication fails
• BZ - 172693 - One translated Polish language error is missing preventing squid from startup
• BZ - 174029 - CVE-2005-2917 Squid malformed NTLM authentication DoS

CVEs

• CVE-2005-2917

References

(none)