(Fedora Issues Fix for FC2) Squid ntlm_check_auth() Buffer Overflow Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1010459
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SecurityTracker URL: http://securitytracker.com/id?1010459
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CVE Reference: CAN-2004-0541
(Links to External Site)
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Date: Jun 10 2004
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Impact: Execution of arbitrary code via network, User access via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 3.*-PRE, 2.5.*
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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.
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Impact: A remote user can execute arbitrary code on the target system.
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Solution: Fedora has released a fix, available at:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/2/
b735863f8f52314d1ff9981c85ea56b2
SRPMS/squid-2.5.STABLE5-4.fc2.src.rpm
4d80ef2db40a68a7ba2ecffdec9d3372 i386/squid-2.5.STABLE5-4.fc2.i386.rpm
779417acbbfe0e022bc1525d9faae339
i386/debug/squid-debuginfo-2.5.STABLE5-4.fc2.i386.rpm
c8c1bc2cd95f892ce602e3e38e9e7823 x86_64/squid-2.5.STABLE5-4.fc2.x86_64.rpm
fcb5484591641424a956b23c97614963
x86_64/debug/squid-debuginfo-2.5.STABLE5-4.fc2.x86_64.rpm
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Vendor URL: www.squid-cache.org/ (Links to External Site)
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Cause: Boundary error
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Underlying OS: Linux (Red Hat Fedora)
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Underlying OS Comments: Fedora Core 2
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Reported By: Jay Fenlason <fenlason@redhat.com>
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 9 Jun 2004 11:23:12 -0400
From: Jay Fenlason <fenlason@redhat.com>
Subject: [SECURITY] Fedora Core 2 Update: squid-2.5.STABLE5-4.fc2
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---------------------------------------------------------------------
Fedora Update Notification
FEDORA-2004-164
2004-06-09
---------------------------------------------------------------------
Product : Fedora Core 2
Name : squid
Version : 2.5.STABLE5
Release : 4.fc2
Summary : The Squid proxy caching server.
Description :
Squid is a high-performance proxy caching server for Web clients,
supporting FTP, gopher, and HTTP data objects. Unlike traditional
caching software, Squid handles all requests in a single,
non-blocking, I/O-driven process. Squid keeps meta data and especially
hot objects cached in RAM, caches DNS lookups, supports non-blocking
DNS lookups, and implements negative caching of failed requests.
Squid consists of a main server program squid, a Domain Name System
lookup program (dnsserver), a program for retrieving FTP data
(ftpget), and some management and client tools.
---------------------------------------------------------------------
* Mon Jun 07 2004 Jay Fenlason <fenlason@redhat.com> 7:2.5.STABLE3-4.fc2
- Backport security fix for ntlm auth helper (CAN-2004-0541).
* Thu Apr 08 2004 Jay Fenlason <fenlason@redhat.com> 7:2.5.STABLE5-3
- Fix the -pipe patch to have the correct name of the winbind pipe.
---------------------------------------------------------------------
This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/2/
b735863f8f52314d1ff9981c85ea56b2 SRPMS/squid-2.5.STABLE5-4.fc2.src.rpm
4d80ef2db40a68a7ba2ecffdec9d3372 i386/squid-2.5.STABLE5-4.fc2.i386.rpm
779417acbbfe0e022bc1525d9faae339 i386/debug/squid-debuginfo-2.5.STABLE5-4.fc2.i386.rpm
c8c1bc2cd95f892ce602e3e38e9e7823 x86_64/squid-2.5.STABLE5-4.fc2.x86_64.rpm
fcb5484591641424a956b23c97614963 x86_64/debug/squid-debuginfo-2.5.STABLE5-4.fc2.x86_64.rpm
This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.
---------------------------------------------------------------------
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