1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200804-11 / policyd-weight |
| Release Date | April 11, 2008 |
| Latest Revision | April 11, 2008: 01 |
| Impact | normal |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| mail-filter/policyd-weight | < 0.1.14.17 | >= 0.1.14.17 | All supported architectures |
Related bugreports: #214403
policyd-weight uses temporary files in an insecure manner, allowing for a symlink attack.
policyd-weight is a Perl policy daemon for the Postfix MTA intended to eliminate forged envelope senders and HELOs.
Chris Howells reported that policyd-weight creates and uses the "/tmp/.policyd-weight/" directory in an insecure manner.
A local attacker could exploit this vulnerability to delete arbitrary files or change the ownership to the "polw" user via symlink attacks.
Set "$LOCKPATH = '/var/run/policyd-weight/'" manually in "/etc/policyd-weight.conf".
All policyd-weight users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# 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.