GLSA-200702-06 : BIND: 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-200702-06
(BIND: Denial of Service)

An unspecified improper usage of an already freed context has been
reported. Additionally, an assertion error could be triggered in the
DNSSEC validation of some responses to type ANY queries with multiple
RRsets.

Impact :

A remote attacker could crash the server through unspecified vectors
or, if DNSSEC validation is enabled, by sending certain crafted ANY
queries.

Workaround :

There is no known workaround at this time for the first issue. The
DNSSEC validation Denial of Service can be prevented by disabling
DNSSEC validation until the upgrade to a fixed version. Note that
DNSSEC validation is disabled on a default configuration.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200702-06.xml

Solution :

All ISC BIND 9.3 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-dns/bind-9.3.4'
All ISC BIND 9.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-dns/bind-9.2.8'

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 24367 (gentoo_GLSA-200702-06.nasl)

Bugtraq ID:

CVE ID: CVE-2007-0493
CVE-2007-0494