Date: Wed, 19 May 2004 08:03:40 -0400
From: Kurt Lieber <klieber@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Subject: [ GLSA 200405-09 ] ProFTPD Access Control List bypass vulnerability
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
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Gentoo Linux Security Advisory GLSA 200405-09
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http://security.gentoo.org/
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Severity: High
Title: ProFTPD Access Control List bypass vulnerability
Date: May 19, 2004
Bugs: #49496
ID: 200405-09
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Synopsis
========
Version 1.2.9 of ProFTPD introduced a vulnerability that causes
CIDR-based Access Control Lists (ACLs) to be treated as "AllowAll",
thereby allowing remote users full access to files available to the
FTP daemon.
Background
==========
ProFTPD is an FTP daemon.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-ftp/proftpd == 1.2.9-r1 >= 1.2.9-r2
1 net-ftp/proftpd == 1.2.9 >= 1.2.9-r2
Description
===========
ProFTPD 1.2.9 introduced a vulnerability that allows CIDR-based ACLs
(such as 10.0.0.1/24) to be bypassed. The CIDR ACLs are disregarded,
with the net effect being similar to an "AllowAll" directive.
Impact
======
This vulnerability may allow unauthorized files, including critical
system files to be downloaded and/or modified, thereby allowing a
potential remote compromise of the server.
Workaround
==========
Users may work around the problem by avoiding use of CIDR-based ACLs.
Resolution
==========
ProFTPD users are encouraged to upgrade to the latest version of the
package:
# emerge sync
# emerge -pv ">=net-ftp/proftpd-1.2.9-r2"
# emerge ">=net-ftp/proftpd-1.2.9-r2"
References
==========
[ 1 ] CAN-2004-0432
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0432
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200405-09.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 Technologies, 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/1.0
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