[200405-09] ProFTPD Access Control List bypass vuln.

[pahud]

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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.cg ... -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