GLSA-200809-02 : dnsmasq: Denial of Service and DNS spoofing

medium Nessus Plugin ID 34091
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


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


The remote host is affected by the vulnerability described in GLSA-200809-02 (dnsmasq: Denial of Service and DNS spoofing)

Dan Kaminsky of IOActive reported that dnsmasq does not randomize UDP source ports when forwarding DNS queries to a recursing DNS server (CVE-2008-1447).
Carlos Carvalho reported that dnsmasq in the 2.43 version does not properly handle clients sending inform or renewal queries for unknown DHCP leases, leading to a crash (CVE-2008-3350).
Impact :

A remote attacker could send spoofed DNS response traffic to dnsmasq, possibly involving generating queries via multiple vectors, and spoof DNS replies, which could e.g. lead to the redirection of web or mail traffic to malicious sites. Furthermore, an attacker could generate invalid DHCP traffic and cause a Denial of Service.
Workaround :

There is no known workaround at this time.


All dnsmasq users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-dns/dnsmasq-2.45'

See Also

Plugin Details

Severity: Medium

ID: 34091

File Name: gentoo_GLSA-200809-02.nasl

Version: 1.29

Type: local

Published: 9/5/2008

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:dnsmasq, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/4/2008

Reference Information

CVE: CVE-2008-1447, CVE-2008-3350

GLSA: 200809-02

IAVA: 2008-A-0045