GLSA-200704-11 : Vixie Cron: Denial of Service

This script is Copyright (C) 2007-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200704-11
(Vixie Cron: Denial of Service)

During an internal audit, Raphael Marichez of the Gentoo Linux Security
Team found that Vixie Cron has weak permissions set on Gentoo, allowing
for a local user to create hard links to system and users cron files,
while a st_nlink check in database.c will generate a superfluous error.

Impact :

Depending on the partitioning scheme and the 'cron' group membership, a
malicious local user can create hard links to system or users cron
files that will trigger the st_link safety check and prevent the
targeted cron file from being run from the next restart or database
reload.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200704-11.xml

Solution :

All Vixie Cron users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=sys-process/vixie-cron-4.1-r10'

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 25056 (gentoo_GLSA-200704-11.nasl)

Bugtraq ID:

CVE ID: CVE-2007-1856