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[ GLSA 200804-11 ] policyd-weight: Insecure temporary file creation
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PostPosted: Fri Apr 11, 2008 4:26 pm    Post subject: [ GLSA 200804-11 ] policyd-weight: Insecure temporary file c Reply with quote

Gentoo Linux Security Advisory

Title: policyd-weight: Insecure temporary file creation (GLSA 200804-11)
Severity: normal
Exploitable: local
Date: April 11, 2008
Bug(s): #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: mail-filter/policyd-weight
Vulnerable: < 0.1.14.17
Unaffected: >= 0.1.14.17
Architectures: 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:
Code:
# 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
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