(Gentoo Issues Fix) nfs-utils rquota Buffer Overflow on 64-bit Systems May Let Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1012501 |
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SecurityTracker URL: http://securitytracker.com/id/1012501
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CVE Reference:
CAN-2004-0946
(Links to External Site)
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Date: Dec 14 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): possibly affects 1.07-pre2 and prior versions
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Description:
A buffer overflow vulnerability was reported in nfs-utils, affecting 64-bit systems. A remote user may be able to execute arbitrary code.
It is reported that on 64-bit systems, a remote user may be able to trigger a memcpy() buffer overflow in 'rquota_server.c'. Data from the dqblk structure that is 64 bits (on 64-bit systems) is copied into the rquota structure to a 32-bit variable.
Arjan van de Ven is credited with discovering this flaw.
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Impact:
A remote user may be able to execute arbitrary code on the target system.
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Solution:
Gentoo has released a fix and indicates that all nfs-utils users should upgarde to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/nfs-utils-1.0.6-r6"
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Vendor URL: nfs.sourceforge.net/ (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Gentoo)
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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: Mon, 13 Dec 2004 22:54:15 -0500
Subject: [gentoo-announce] [ GLSA 200412-08 ] nfs-utils: Multiple remote vulnerabilities
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Gentoo Linux Security Advisory GLSA 200412-08
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http://security.gentoo.org/
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Severity: High
Title: nfs-utils: Multiple remote vulnerabilities
Date: December 14, 2004
Bugs: #72113
ID: 200412-08
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Synopsis
========
Multiple vulnerabilities have been discovered in nfs-utils that could
lead to a Denial of Service, or the execution of arbitrary code.
Background
==========
nfs-utils is a package containing the client and daemon implementations
for the NFS protocol.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-fs/nfs-utils < 1.0.6-r6 >= 1.0.6-r6
Description
===========
Arjan van de Ven has discovered a buffer overflow on 64-bit
architectures in 'rquota_server.c' of nfs-utils (CAN-2004-0946). A
remotely exploitable flaw on all architectures also exists in the
'statd.c' file of nfs-utils (CAN-2004-1014), which can be triggered by
a mishandled SIGPIPE.
Impact
======
A remote attacker could potentially cause a Denial of Service, or even
execute arbitrary code (64-bit architectures only) on a remote NFS
server.
Workaround
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There is no known workaround at this time.
Resolution
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All nfs-utils users should upgarde to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/nfs-utils-1.0.6-r6"
References
==========
[ 1 ] CAN-2004-0946
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0946
[ 2 ] CAN-2004-1014
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1014
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200412-08.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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