GLSA 200508-02: ProFTPD: Format string vulnerabilities
Posted on: 08/01/2005 04:47 PM

A ProFTPD security update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200508-02
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http://security.gentoo.org/
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Severity: Normal
Title: ProFTPD: Format string vulnerabilities
Date: August 01, 2005
Bugs: #100364
ID: 200508-02

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Synopsis
=======

Under specific circumstances, ProFTPD is vulnerable to format string vulnerabilities, potentially resulting in the execution of arbitrary code.

Background
=========

ProFTPD is a configurable GPL-licensed FTP server software.

Affected packages
================

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Package / Vulnerable / Unaffected
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1 net-ftp/proftpd lt; 1.2.10-r7 gt;= 1.2.10-r7

Description
==========

"infamous42md" reported that ProFTPD is vulnerable to format string vulnerabilities when displaying a shutdown message containing the name of the current directory, and when displaying response messages to the client using information retrieved from a database using mod_sql.

Impact
=====

A remote attacker could create a directory with a malicious name that would trigger the format string issue if specific variables are used in the shutdown message, potentially resulting in a Denial of Service or the execution of arbitrary code with the rights of the user running the ProFTPD server. An attacker with control over the database contents could achieve the same result by introducing malicious messages that would trigger the other format string issue when used in server responses.

Workaround
=========

Do not use the "%C", "%R", or "%U" in shutdown messages, and do not set the "SQLShowInfo" directive.

Resolution
=========

All ProFTPD users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-ftp/proftpd-1.2.10-r7"

References
=========

[ 1 ] CAN-2005-2390
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2390

Availability
===========

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200508-02.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


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