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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : squid
SUMMARY : Fixes for squid vulnerabilities
DATE : 2004-11-03 10:48:00
ID : CLA-2004:882
RELEVANT
RELEASES : 9, 10

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DESCRIPTION
Squid[1] is a full-featured web proxy cache.

This announcement fixes a denial of service vulnerability[2] in squid
caused by a malformed NTLMSSP packet. This causes a negative value to
be passed to memcpy on servers with NTLM authentication enabled,
making squid abort and causing a denial of service condition.

Fixes for two segmentation faults were also included: when using a
blank user name in digest authentication[3] and after the message
"Likely proxy abuse detected" has been printed to cache.log[4].

Also fixes a denial of service situation[5] caused by certain
malformed SNMP requests that when received by squid could restart it
with a segmentation fault error.

For Conectiva Linux 9, this announcement also fixes a buffer overflow
vulnerability[6] in the ntlm_check_auth (NTLM authentication)
function that allowed remote attackers to execute arbitrary code via
a long password.

SOLUTION
It is recommended that all squid users upgrade to the latest
packages. This update will automatically restart the service if it is
already running.


REFERENCES
1.http://squid.nlanr.net/
2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0832
3.http://www1.uk.squid-cache.org/squid/Versions/v2/2.5/bugs/#squid-2.5.S
TABLE5-digest_blank
4.http://www1.uk.squid-cache.org/squid/Versions/v2/2.5/bugs/#squid-2.5.S
TABLE5-proxy_abuse
5.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0918
6.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0541

UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/10/SRPMS/squid-2.5.5-63116U10_4cl.sr
c.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-2.5.5-63116U10_4cl.i38
6.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-auth-2.5.5-63116U10_4c
l.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-extra-templates-2.5.5-
63116U10_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/squid-2.5.5-25761U90_7cl.src
.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/squid-2.5.5-25761U90_7cl.i386
.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/squid-auth-2.5.5-25761U90_7cl
.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/squid-extra-templates-2.5.5-2
5761U90_7cl.i386.rpm

ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions regarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com

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