Date: Fri, 11 Feb 2005 22:10:16 +0100
From: Thierry Carrez <koon@gentoo.org.>
To: [email protected]Subject: [ GLSA 200502-13 ] Perl: Vulnerabilities in perl-suid wrapper
X-Enigmail-Version: 0.89.5.0
X-Enigmail-Supports: pgp-inline, pgp-mime
Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature";
boundary="------------enigB9C723D42F308FEFABCBD917"
X-Virus-Scanned: antivirus-gw at tyumen.ru
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigB9C723D42F308FEFABCBD917
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200502-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: High
Title: Perl: Vulnerabilities in perl-suid wrapper
Date: February 11, 2005
Bugs: #80460
ID: 200502-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
Vulnerabilities leading to file overwriting and code execution with
elevated privileges have been discovered in the perl-suid wrapper.
Background
==========
Perl is a stable, cross-platform programming language created by Larry
Wall. The perl-suid wrapper allows the use of setuid perl scripts, i.e.
user-callable Perl scripts which have elevated privileges. This
function is enabled only if you have the perlsuid USE flag set.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-lang/perl < 5.8.6-r3 >= 5.8.6-r3
*>= 5.8.5-r4
*>= 5.8.4-r3
*>= 5.8.2-r3
Description
===========
perl-suid scripts honor the PERLIO_DEBUG environment variable and write
to that file with elevated privileges (CAN-2005-0155). Furthermore,
calling a perl-suid script with a very long path while PERLIO_DEBUG is
set could trigger a buffer overflow (CAN-2005-0156).
Impact
======
A local attacker could set the PERLIO_DEBUG environment variable and
call existing perl-suid scripts, resulting in file overwriting and
potentially the execution of arbitrary code with root privileges.
Workaround
==========
You are not vulnerable if you do not have the perlsuid USE flag set or
do not use perl-suid scripts.
Resolution
==========
All Perl users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose dev-lang/perl
References
==========
[ 1 ] CAN-2005-0155
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0155
[ 2 ] CAN-2005-0156
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0156
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200502-13.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
[email protected] 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
--------------enigB9C723D42F308FEFABCBD917
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFCDR84vcL1obalX08RAoFhAJwNuXW5vKTb5bK6hlIFeFTymMiyPACgo6rI
QtLBjucJJH+AtrEem2NBHKI=
=bYD1
-----END PGP SIGNATURE-----
--------------enigB9C723D42F308FEFABCBD917--
