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                   Red Hat Security Advisory

Synopsis:          Moderate: squid security update
Advisory ID:       RHSA-2005:201-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-201.html
Issue date:        2005-03-16
Updated on:        2005-03-16
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2005-0446
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1. Summary:

An updated squid package that fixes a denial of service issue is now
available for Red Hat Enterprise Linux 4.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

Squid is a full-featured Web proxy cache.  
  
A bug was found in the way Squid handles fully qualified domain name (FQDN)
lookups.  A malicious DNS server could crash Squid by sending a carefully
crafted DNS response to an FQDN lookup.  The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2005-0446 to
this issue.  
 
This erratum also includes two minor patches to the LDAP helpers.  One 
corrects a slight malformation in ldap search requests (although all 
known LDAP servers accept the requests).  The other adds documentation 
for the -v option to the ldap helpers. 
 
Users of Squid should upgrade to this updated package, which contains a  
backported patch, and is not vulnerable to this issue.

4. 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/

5. Bug IDs fixed (http://bugzilla.redhat.com/):

148882 - CAN-2005-0446 Squid DoS from bad DNS response

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/squid-2.5.STABLE6-3.4E.5.src.rpm
211b70fedb9069adb1eec627a4f8e707  squid-2.5.STABLE6-3.4E.5.src.rpm

i386:
c67133061261fcf5c3cac5345c7222fa  squid-2.5.STABLE6-3.4E.5.i386.rpm

ia64:
99d6fd73bb7d277fc679cc00d9b19e7d  squid-2.5.STABLE6-3.4E.5.ia64.rpm

ppc:
4c144b5a2171d36b1e6b5992f4912775  squid-2.5.STABLE6-3.4E.5.ppc.rpm

s390:
22e53afff8b89dda33a0e208f2eb38cf  squid-2.5.STABLE6-3.4E.5.s390.rpm

s390x:
00f6e8d80524790bc43ad89bf080cf86  squid-2.5.STABLE6-3.4E.5.s390x.rpm

x86_64:
644f7b720340cfc60f5f62fddc595560  squid-2.5.STABLE6-3.4E.5.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/squid-2.5.STABLE6-3.4E.5.src.rpm
211b70fedb9069adb1eec627a4f8e707  squid-2.5.STABLE6-3.4E.5.src.rpm

i386:
c67133061261fcf5c3cac5345c7222fa  squid-2.5.STABLE6-3.4E.5.i386.rpm

x86_64:
644f7b720340cfc60f5f62fddc595560  squid-2.5.STABLE6-3.4E.5.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/squid-2.5.STABLE6-3.4E.5.src.rpm
211b70fedb9069adb1eec627a4f8e707  squid-2.5.STABLE6-3.4E.5.src.rpm

i386:
c67133061261fcf5c3cac5345c7222fa  squid-2.5.STABLE6-3.4E.5.i386.rpm

ia64:
99d6fd73bb7d277fc679cc00d9b19e7d  squid-2.5.STABLE6-3.4E.5.ia64.rpm

x86_64:
644f7b720340cfc60f5f62fddc595560  squid-2.5.STABLE6-3.4E.5.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/squid-2.5.STABLE6-3.4E.5.src.rpm
211b70fedb9069adb1eec627a4f8e707  squid-2.5.STABLE6-3.4E.5.src.rpm

i386:
c67133061261fcf5c3cac5345c7222fa  squid-2.5.STABLE6-3.4E.5.i386.rpm

ia64:
99d6fd73bb7d277fc679cc00d9b19e7d  squid-2.5.STABLE6-3.4E.5.ia64.rpm

x86_64:
644f7b720340cfc60f5f62fddc595560  squid-2.5.STABLE6-3.4E.5.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE8-dns_assert
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0446

8. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.