GLSA-200504-03 : Dnsmasq: Poisoning and Denial of Service vulnerabilities

This script is Copyright (C) 2005-2014 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-200504-03
(Dnsmasq: Poisoning and Denial of Service vulnerabilities)

Dnsmasq does not properly detect that DNS replies received do not
correspond to any DNS query that was sent. Rob Holland of the Gentoo
Linux Security Audit team also discovered two off-by-one buffer
overflows that could crash DHCP lease files parsing.

Impact :

A remote attacker could send malicious answers to insert arbitrary
DNS data into the Dnsmasq cache. These attacks would in turn help an
attacker to perform man-in-the-middle and site impersonation attacks.
The buffer overflows might allow an attacker on the local network to
crash Dnsmasq upon restart.

Workaround :

There is no known workaround at this time.

See also :

http://www.thekelleys.org.uk/dnsmasq/CHANGELOG
http://www.gentoo.org/security/en/glsa/glsa-200504-03.xml

Solution :

All Dnsmasq users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-dns/dnsmasq-2.22'

Risk factor :

Low

Family: Gentoo Local Security Checks

Nessus Plugin ID: 17977 (gentoo_GLSA-200504-03.nasl)

Bugtraq ID:

CVE ID: