May 2005
Gentoo - Two Security Advisories: 1. gzip: Multiple vulnerabilities [GLSA 200505-05] - 2. TCPDump: Decoding routines Denial of Service vulnerability [GLSA 200505-06]
ID: 00395
Ref: 365/05
Date: 10 May 2005:16:18:26
Version: 1
Title: Gentoo - Two Security Advisories: 1. gzip: Multiple vulnerabilities [GLSA 200505-05] - 2. TCPDump: Decoding routines Denial of Service vulnerability [GLSA 200505-06]
Abstract: 1. gzip contains multiple vulnerabilities potentially allowing an attacker to execute arbitrary commands. - 2. A flaw in the decoding of network packets renders TCPDump vulnerable to a remote Denial of Service attack.
Vendors affected: Gentoo
Operating systems affected: Gentoo
Applications affected: Gentoo
Title
=====
Gentoo - Two Security Advisories:
1. gzip: Multiple vulnerabilities [GLSA 200505-05]
2. TCPDump: Decoding routines Denial of Service vulnerability [GLSA 200505-06]
Detail
======
Security advisory summaries:
1. gzip contains multiple vulnerabilities potentially allowing an attacker
to execute arbitrary commands.
2. A flaw in the decoding of network packets renders TCPDump vulnerable to
a remote Denial of Service attack.
Security advisory content follows:
1.
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Gentoo Linux Security Advisory GLSA 200505-05
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http://security.gentoo.org/
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Severity: Normal
Title: gzip: Multiple vulnerabilities
Date: May 09, 2005
Bugs: #89946, #90626
ID: 200505-05
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Synopsis
========
gzip contains multiple vulnerabilities potentially allowing an attacker
to execute arbitrary commands.
Background
==========
gzip (GNU zip) is a popular compression program. The included zgrep
utility allows you to grep gzipped files in place.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/gzip < 1.3.5-r6 >= 1.3.5-r6
Description
===========
The gzip and gunzip programs are vulnerable to a race condition when
setting file permissions (CAN-2005-0988), as well as improper handling
of filename restoration (CAN-2005-1228). The zgrep utility improperly
sanitizes arguments, which may come from an untrusted source
(CAN-2005-0758).
Impact
======
These vulnerabilities could allow arbitrary command execution, changing
the permissions of arbitrary files, and installation of files to an
aribitrary location in the filesystem.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All gzip users should upgrade to the latest stable version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/gzip-1.3.5-r6"
References
==========
[ 1 ] CAN-2005-0758
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0758
[ 2 ] CAN-2005-0988
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0988
[ 3 ] CAN-2005-1228
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1228
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200505-05.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 2005 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
2.
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Gentoo Linux Security Advisory GLSA 200505-06
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http://security.gentoo.org/
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Severity: Normal
Title: TCPDump: Decoding routines Denial of Service vulnerability
Date: May 09, 2005
Bugs: #90541
ID: 200505-06
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Synopsis
========
A flaw in the decoding of network packets renders TCPDump vulnerable to
a remote Denial of Service attack.
Background
==========
TCPDump is a tool for network monitoring and data acquisition.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/tcpdump < 3.8.3-r2 >= 3.8.3-r2
Description
===========
TCPDump improperly handles and decodes ISIS, BGP, LDP (CAN-2005-1279)
and RSVP (CAN-2005-1280) packets. TCPDump might loop endlessly after
receiving malformed packets.
Impact
======
A malicious remote attacker can exploit the decoding issues for a
Denial of Service attack by sending specially crafted packets, possibly
causing TCPDump to loop endlessly.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All TCPDump users should upgrade to the latest available version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.8.3-r2"
References
==========
[ 1 ] CAN-2005-1279
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1279
[ 2 ] CAN-2005-1280
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1280
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200505-06.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 2005 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