---
id: CVE-2019-1697
title: >-
  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 atta…
summary: >-
  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 atta…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-20
  - CWE-20
vendor: cisco
product: adaptive_security_appliance_software
affected:
  - adaptive_security_appliance_software < 9.6.4.25
  - 'adaptive_security_appliance_software >= 9.7, < 9.8.4'
  - 'adaptive_security_appliance_software >= 9.9, < 9.9.2.50'
  - 'adaptive_security_appliance_software >= 9.10, < 9.10.1.17'
  - secure_firewall_threat_defense < 6.2.3.12
  - 'secure_firewall_threat_defense >= 6.3.0, < 6.3.0.3'
patched:
  - adaptive_security_appliance_software 9.10.1.17
  - secure_firewall_threat_defense 6.3.0.3
published: '2019-05-03'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-1697'
references:
  - url: 'http://www.securityfocus.com/bid/108182'
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftds-ldapdos
    label: psirt@cisco.com
  - url: 'http://www.securityfocus.com/bid/108182'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftds-ldapdos
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02028
epssPercentile: 0.79897
ingestedAt: '2026-08-11T19:48:26.481Z'
---

## Overview

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.

## Affected

- `adaptive_security_appliance_software < 9.6.4.25`
- `adaptive_security_appliance_software >= 9.7, < 9.8.4`
- `adaptive_security_appliance_software >= 9.9, < 9.9.2.50`
- `adaptive_security_appliance_software >= 9.10, < 9.10.1.17`
- `secure_firewall_threat_defense < 6.2.3.12`
- `secure_firewall_threat_defense >= 6.3.0, < 6.3.0.3`

## Remediation

Upgrade past the affected range:

- `adaptive_security_appliance_software 9.10.1.17`
- `secure_firewall_threat_defense 6.3.0.3`