GLSA-200801-16 : MaraDNS: CNAME Denial of Service

This script is Copyright (C) 2008-2014 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-200801-16
(MaraDNS: CNAME Denial of Service)

Michael Krieger reported that a specially crafted DNS could prevent an
authoritative canonical name (CNAME) record from being resolved because
of an 'improper rotation of resource records'.

Impact :

A remote attacker could send specially crafted DNS packets to a
vulnerable server, making it unable to resolve CNAME records.

Workaround :

Add 'max_ar_chain = 2' to the 'marac' configuration file.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200801-16.xml

Solution :

All MaraDNS users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-dns/maradns-1.2.12.09'

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 30128 (gentoo_GLSA-200801-16.nasl)

Bugtraq ID:

CVE ID: CVE-2008-0061