(Conectiva Issues Fix) Squid ntlm_check_auth() Buffer Overflow Lets Remote Users Execute Arbitrary Code
|
|
SecurityTracker Alert ID: 1012069 |
|
SecurityTracker URL: http://securitytracker.com/id/1012069
|
|
CVE Reference:
CAN-2004-0541
(Links to External Site)
|
Date: Nov 3 2004
|
Impact:
Execution of arbitrary code via network, User access via network
|
Fix Available: Yes Vendor Confirmed: Yes
|
Version(s): 3.*-PRE, 2.5.*
|
Description:
iDEFENSE reported a buffer overflow vulnerability in Squid in the processing of NTLM authentication messages. A remote user can execute arbitrary code on the target system.
It is reported that if the proxy is configured to use the NTLM authentication helper, a remote user can send a specially crafted password to trigger a buffer overflow in 'helpers/ntlm_auth/SMB/libntlmssp.c' in the ntlm_check_auth() function.
The vendor was reportedly notified on May 20, 2004.
|
Impact:
A remote user can execute arbitrary code on the target system.
|
Solution:
Conectiva has released a fix.
ftp://atualizacoes.conectiva.com.br/10/SRPMS/squid-2.5.5-63116U10_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-2.5.5-63116U10_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-auth-2.5.5-63116U10_4cl.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-2.5.5-25761U90_7cl.i386.rpm
|
Vendor URL: www.squid-cache.org/ (Links to External Site)
|
Cause:
Boundary error
|
Underlying OS:
Linux (Conectiva)
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: Wed, 3 Nov 2004 10:48:39 -0200
Subject: [Conectiva-updates] [CLA-2004:882] Conectiva Security Announcement
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT
- --------------------------------------------------------------------------
PACKAGE : squid
SUMMARY : Fixes for squid vulnerabilities
DATE : 2004-11-03 10:48:00
ID : CLA-2004:882
RELEVANT
RELEASES : 9, 10
- -------------------------------------------------------------------------
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.STABLE5-digest_blank
4.http://www1.uk.squid-cache.org/squid/Versions/v2/2.5/bugs/#squid-2.5.STABLE5-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.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-2.5.5-63116U10_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/squid-auth-2.5.5-63116U10_4cl.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-2.5.5-25761U90_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
- -------------------------------------------------------------------------
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
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en
- -------------------------------------------------------------------------
Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com
- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org
iD8DBQFBiNOm42jd0JmAcZARAuHhAKCQ6gd4JsoVtoGECoI3urtPR4kGhACeKiPB
nU7lhnlGZ+D+uhuNqdA1qyk=
=71kq
-----END PGP SIGNATURE-----
______________________________________________________________________
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
|
|
