Multiple Cisco Products Vulnerable to DNS Cache Poisoning Attacks

medium Nessus Plugin ID 49017
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The remote device is missing a vendor-supplied security patch.


Multiple Cisco products are vulnerable to DNS cache poisoning attacks due to their use of insufficiently randomized DNS transaction IDs and UDP source ports in the DNS queries that they produce, which may allow an attacker to more easily forge DNS answers that can poison DNS caches.
To exploit this vulnerability an attacker must be able to cause a vulnerable DNS server to perform recursive DNS queries. Therefore, DNS servers that are only authoritative, or servers where recursion is not allowed, are not affected.
Cisco has released free software updates that address these vulnerabilities.


Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20080708-dns.

See Also

Plugin Details

Severity: Medium

ID: 49017

File Name: cisco-sa-20080708-dnshttp.nasl

Version: 1.22

Type: combined

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Dependencies: cisco_ios_version.nasl

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

Required KB Items: Host/Cisco/IOS/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/8/2008

Vulnerability Publication Date: 7/8/2008

Exploitable With

Metasploit (DNS BailiWicked Host Attack)

Reference Information

CVE: CVE-2008-1447

BID: 30131