Cisco ASA Software DNS Response Message Handling DoS (cisco-sa-20170419-asa-dns)

high Nessus Plugin ID 99665
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The remote device is missing a vendor-supplied security patch.


According to its self-reported version and configuration, the Cisco Adaptive Security Appliance (ASA) software running on the remote device is affected by a denial of service vulnerability in the DNS code due to improper handling of crafted DNS response messages. An unauthenticated, remote attacker can exploit this, via a specially crafted DNS response, to cause the device to reload or corrupt the local DNS cache information.


Upgrade to the relevant fixed version referenced in Cisco security advisory cisco-sa-20170419-asa-dns.

See Also

Plugin Details

Severity: High

ID: 99665

File Name: cisco-sa-20170419-asa-dns.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 4/25/2017

Updated: 11/13/2019

Dependencies: ssh_get_info.nasl, os_fingerprint.nasl

Risk Information

CVSS Score Source: CVE-2017-6607


Risk Factor: Medium

Score: 6.3


Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

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


Risk Factor: High

Base Score: 8.7

Temporal Score: 7.6

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

Required KB Items: Host/Cisco/ASA, Host/Cisco/ASA/model

Exploit Ease: No known exploits are available

Patch Publication Date: 4/19/2017

Vulnerability Publication Date: 4/19/2017

Reference Information

CVE: CVE-2017-6607

BID: 97933


CISCO-SA: cisco-sa-20170419-asa-dns