Gentoo Logo

ProFTPD: Remote execution of arbitrary code

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200611-26 / proftpd
Release Date November 30, 2006
Latest Revision November 30, 2006: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-ftp/proftpd < 1.3.0a >= 1.3.0a All supported architectures

Related bugreports: #154650

Synopsis

ProFTPD is affected by mutiple vulnerabilities allowing for the remote execution of arbitrary code.

2.  Impact Information

Background

ProFTPD is a highly-configurable FTP server.

Description

Evgeny Legerov discovered a stack-based buffer overflow in the s_replace() function in support.c, as well as a buffer overflow in in the mod_tls module. Additionally, an off-by-two error related to the CommandBufferSize configuration directive was reported.

Impact

An authenticated attacker could exploit the s_replace() vulnerability by uploading a crafted .message file or sending specially crafted commands to the server, possibly resulting in the execution of arbitrary code with the rights of the user running ProFTPD. An unauthenticated attacker could send specially crafted data to the server with mod_tls enabled which could result in the execution of arbitrary code with the rights of the user running ProFTPD. Finally, the off-by-two error related to the CommandBufferSize configuration directive was fixed - exploitability of this error is disputed. Note that the default configuration on Gentoo is to run ProFTPD as an unprivileged user, and has mod_tls disabled.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ProFTPD users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-ftp/proftpd-1.3.0a"

4.  References



Print

Page updated November 30, 2006

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.

Copyright 2001-2014 Gentoo Foundation, Inc. Questions, Comments? Contact us.