Cisco ASA DNS Packet Handling DoS (cisco-sa-20151021-asa-dns2)

medium Nessus Plugin ID 93530
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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its version and configuration, the remote Cisco Adaptive Security Appliance (ASA) device is affected by a denial of service vulnerability due to improper processing of DNS packets. An unauthenticated, remote attacker can exploit this, via a spoofed reply packet with a crafted DNS response, to cause the device to reload.

Solution

Apply the relevant patch referenced in Cisco bug ID CSCuu07799.
Alternatively, remove DNS name-server values configured for any DNS server groups.

See Also

http://www.nessus.org/u?1387798a

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuu07799

Plugin Details

Severity: Medium

ID: 93530

File Name: cisco-sa-20151021-asa-dns2.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 9/15/2016

Updated: 11/14/2019

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2015-6326

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

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

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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: 10/21/2015

Vulnerability Publication Date: 10/21/2015

Reference Information

CVE: CVE-2015-6326

BID: 77261

CISCO-BUG-ID: CSCuu07799

CISCO-SA: cisco-sa-20151021-asa-dns2