GLSA-200901-03 : pdnsd: Denial of Service and cache poisoning

medium Nessus Plugin ID 35347
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-200901-03 (pdnsd: Denial of Service and cache poisoning)

Two issues have been reported in pdnsd:
The p_exec_query() function in src/dns_query.c does not properly handle many entries in the answer section of a DNS reply, related to a 'dangling pointer bug' (CVE-2008-4194).
The default value for query_port_start was set to 0, disabling UDP source port randomization for outgoing queries (CVE-2008-1447).
Impact :

An attacker could exploit the second weakness to poison the cache of pdnsd and thus spoof DNS traffic, which could e.g. lead to the redirection of web or mail traffic to malicious sites. The first issue can be exploited by enticing pdnsd to send a query to a malicious DNS server, or using the port randomization weakness, and might lead to a Denial of Service.
Workaround :

Port randomization can be enabled by setting the 'query_port_start' option to 1024 which would resolve the CVE-2008-1447 issue.


All pdnsd users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-dns/pdnsd-1.2.7'

See Also

Plugin Details

Severity: Medium

ID: 35347

File Name: gentoo_GLSA-200901-03.nasl

Version: 1.32

Type: local

Published: 1/12/2009

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:pdnsd, 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: 1/11/2009

Reference Information

CVE: CVE-2008-1447, CVE-2008-4194

BID: 30131

GLSA: 200901-03

IAVA: 2008-A-0045

CWE: 399