Cisco ASA Certificate Authority Enrollment Operation Packet Handling DoS (cisco-sa-20161019-asa-ca)

high Nessus Plugin ID 94291
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Synopsis

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

Description

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 Certificate Authority (CA) feature due to improper handling of packets during the enrollment operation. An unauthenticated, remote attacker can exploit this, via a specially crafted enrollment request, to cause the device to reload.

Solution

Upgrade to the relevant fixed version referenced in Cisco security advisory cisco-sa-20161019-asa-ca.

See Also

http://www.nessus.org/u?2c05f684

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz47295

Plugin Details

Severity: High

ID: 94291

File Name: cisco-sa-20161019-asa-ca.nasl

Version: 1.11

Type: local

Family: CISCO

Published: 10/26/2016

Updated: 11/14/2019

Dependencies: ssh_get_info.nasl, os_fingerprint.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/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: 10/19/2016

Vulnerability Publication Date: 10/19/2016

Reference Information

CVE: CVE-2016-6431

BID: 93786

CISCO-BUG-ID: CSCuz47295

CISCO-SA: cisco-sa-20161019-asa-ca