Vixie cron: Denial of Service — GLSA 201311-04

A vulnerability has been found in Vixie cron, allowing local attackers to conduct symlink attacks.

Affected Packages

sys-process/vixie-cron on all architectures
Affected versions < 4.1-r14
Unaffected versions >= 4.1-r14

Background

Paul Vixie’s cron daemon, a fully featured crond implementation.

Description

Vixie cron contains a race condition relating to atime and mtime values of temporary files.

Impact

A local attacker could change the modification time of files, possibly resulting in a Denial of Service condition via a symlink attack.

Workaround

There is no known workaround at this time.

Resolution

All Vixie cron users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=sys-process/vixie-cron-4.1-r14"
 

References

Release Date
November 07, 2013

Latest Revision
November 07, 2013: 1

Severity
normal

Exploitable
local

Bugzilla entries