Multiple Vendor DNS Query ID Field Prediction Cache Poisoning

critical Nessus Plugin ID 33447


The remote name resolver (or the server it uses upstream) is affected by a DNS cache poisoning vulnerability.


The remote DNS resolver does not use random ports when making queries to third-party DNS servers. An unauthenticated, remote attacker can exploit this to poison the remote DNS server, allowing the attacker to divert legitimate traffic to arbitrary sites.


Contact your DNS server vendor for a patch.

See Also

Plugin Details

Severity: Critical

ID: 33447

File Name: dns_non_random_source_ports.nasl

Version: 1.34

Type: remote

Family: DNS

Published: 7/9/2008

Updated: 11/15/2018

Risk Information


Risk Factor: Medium

Score: 6


Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

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


Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

Required KB Items: DNS/recursive_queries

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 7/8/2008

Reference Information

CVE: CVE-2008-1447

BID: 30131

CERT: 800113

IAVA: 2008-A-0045

EDB-ID: 6122, 6123, 6130