[gentoo-announce] [ GLSA 200804-11 ] policyd-weight: Insecure temporary file creation

[news 28]

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Gentoo Linux Security Advisory GLSA 200804-11

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http://security.gentoo.org/

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Severity: Normal

Title: policyd-weight: Insecure temporary file creation

Date: April 11, 2008

Bugs: #214403

ID: 200804-11

 

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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

-------------------------------------------------------------------

1 mail-filter/policyd-weight < 0.1.14.17 >= 0.1.14.17

 

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 -v ">=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

==========

 

[ 1 ] CVE-2008-1569

http://cve.mitre.org/cgi-bin/cvename.cgi?name=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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2008 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/2.5