GLSA 200804-11: policyd-weight: Insecure temporary file creation

http://security.gentoo.org/

Severity:	normal
Title:	policyd-weight: Insecure temporary file creation
Date:	04/11/2008
Bugs:	#214403
ID:	200804-11

Synopsis

policyd-weight uses temporary files in an insecure manner, allowing for a symlink attack.

Background

policyd-weight is a Perl policy daemon for the Postfix MTA intended to eliminate forged envelope senders and HELOs.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
mail-filter/policyd-weight	< 0.1.14.17	>= 0.1.14.17	All supported architectures

Description

Chris Howells reported that policyd-weight creates and uses the "/tmp/.policyd-weight/" directory in an insecure manner.

Impact

A local attacker could exploit this vulnerability to delete arbitrary files or change the ownership to the "polw" user via symlink attacks.

Workaround

Set "$LOCKPATH = '/var/run/policyd-weight/'" manually in "/etc/policyd-weight.conf".

Resolution

All policyd-weight users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-filter/policyd-weight-0.1.14.17"

This version changes the default path for sockets to "/var/run/policyd-weight", which is only writable by a privileged user. Users need to restart policyd-weight immediately after the upgrade due to this change.

References

CVE-2008-1569

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200804-11.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.