(Fedora Issues Fix for FC1) Squid ntlm_check_auth() Buffer Overflow Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1010458 |
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SecurityTracker URL: http://securitytracker.com/id/1010458
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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/1/
ac5bbb825c3ab5223b1b26f162f24c19 SRPMS/squid-2.5.STABLE3-2.fc1.src.rpm
28f6216478b102cbddcf6de38ea8f126 i386/squid-2.5.STABLE3-2.fc1.i386.rpm
c8fb3a9ddc44e0e8d01a092993877ed7 i386/debug/squid-debuginfo-2.5.STABLE3-2.fc1.i386.rpm
e034b4a07c0e00a285f115be6ac63cfa x86_64/squid-2.5.STABLE3-2.fc1.x86_64.rpm
6a4992a5d0244b297ddc9ca44a312541 x86_64/debug/squid-debuginfo-2.5.STABLE3-2.fc1.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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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 11:16:49 -0400
Subject: [SECURITY] Fedora Core 1 Update: squid-2.5.STABLE3-2.fc1
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---------------------------------------------------------------------
Fedora Update Notification
FEDORA-2004-163
2004-06-09
---------------------------------------------------------------------
Product : Fedora Core 1
Name : squid
Version : 2.5.STABLE3
Release : 2.fc1
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.STABLE3-2.fc1
- Backport patch for CAN-2004-0541: buffer overflow in ntlm auth
helper.
---------------------------------------------------------------------
This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
ac5bbb825c3ab5223b1b26f162f24c19 SRPMS/squid-2.5.STABLE3-2.fc1.src.rpm
28f6216478b102cbddcf6de38ea8f126 i386/squid-2.5.STABLE3-2.fc1.i386.rpm
c8fb3a9ddc44e0e8d01a092993877ed7 i386/debug/squid-debuginfo-2.5.STABLE3-2.fc1.i386.rpm
e034b4a07c0e00a285f115be6ac63cfa x86_64/squid-2.5.STABLE3-2.fc1.x86_64.rpm
6a4992a5d0244b297ddc9ca44a312541 x86_64/debug/squid-debuginfo-2.5.STABLE3-2.fc1.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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