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Gentoo Linux Security Advisory GLSA 200502-13
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http://security.gentoo.org/
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Severity: High
Title: Perl: Vulnerabilities in perl-suid wrapper
Date: February 11, 2005
Bugs: #80460
ID: 200502-13
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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
security@xxxxxxxxxx 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
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