Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Lightweight Directory Access Protocol Denial of Service Vulnerability (cisco-sa-20190501-asa-ftds-ldapdos)

high Nessus Plugin ID 136972


The remote device is missing a vendor-supplied security patch


According to its self-reported version, Cisco Firepower Threat Defense Software is affected by a vulnerability in the implementation of the Lightweight Directory Access Protocol (LDAP) feature in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.The vulnerabilities are due to the improper parsing of LDAP packets sent to an affected device. An attacker could exploit these vulnerabilities by sending a crafted LDAP packet, using Basic Encoding Rules (BER), to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Please see the included Cisco BIDs and Cisco Security Advisory for more information


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvn20985

See Also

Plugin Details

Severity: High

ID: 136972

File Name: cisco-sa-20190501-asa-ftds-ldapdos.nasl

Version: 1.4

Type: local

Family: CISCO

Published: 5/29/2020

Updated: 6/4/2020

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 3.6


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

CVSS Score Source: CVE-2019-1697


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:/o:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense

Exploit Ease: No known exploits are available

Patch Publication Date: 5/1/2019

Vulnerability Publication Date: 5/1/2019

Reference Information

CVE: CVE-2019-1697

BID: 108182