GLSA 200405-09: ProFTPD Access Control List bypass vulnerability

http://security.gentoo.org/

Severity:	high
Title:	ProFTPD Access Control List bypass vulnerability
Date:	05/19/2004
Bugs:	#49496
ID:	200405-09

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	Architecture(s)
net-ftp/proftpd	== 1.2.9-r1	>= 1.2.9-r2	All supported architectures

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

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 https://bugs.gentoo.org.