CVE-2021-40118: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Denial of Service Vulnerabilities
First published: Wed Oct 27 2021(Updated: )
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance Software | <9.8.4.40 | |
| Cisco Firepower Threat Defense (FTD) | <6.4.0.13 | |
| Cisco Firepower Threat Defense (FTD) | >=6.5.0<6.6.5 | |
| Cisco Firepower Threat Defense (FTD) | >=6.7.0<6.7.0.3 | |
| Cisco Firepower Threat Defense (FTD) | >=7.0.0<7.0.1 | |
| Cisco Adaptive Security Appliance Software | >=9.9.0<9.12.4.29 | |
| Cisco Adaptive Security Appliance Software | >=9.13.0<9.14.3.9 | |
| Cisco Adaptive Security Appliance Software | >=9.15.0<9.15.1.17 | |
| Cisco Adaptive Security Appliance Software | >=9.16.0<9.16.2.3 | |
| Cisco ASA 5512-X Firmware | =009.012\(004.024\) | |
| Cisco ASA 5512-X Firmware | =009.015\(001\) | |
| Cisco ASA 5512-X Firmware | =009.015\(001.015\) | |
| Cisco ASA 5512-X Firmware | =009.015\(001.016\) | |
| Cisco ASA 5512-X Firmware | =009.016\(001\) | |
| Cisco ASA 5512-X firmware | ||
| Cisco ASA 5505 firmware | =009.012\(004.024\) | |
| Cisco ASA 5505 firmware | =009.015\(001\) | |
| Cisco ASA 5505 firmware | =009.015\(001.015\) | |
| Cisco ASA 5505 firmware | =009.015\(001.016\) | |
| Cisco ASA 5505 firmware | =009.016\(001\) | |
| Cisco ASA 5505 | ||
| Cisco ASA 5515-X Firmware | =009.012\(004.024\) | |
| Cisco ASA 5515-X Firmware | =009.015\(001\) | |
| Cisco ASA 5515-X Firmware | =009.015\(001.015\) | |
| Cisco ASA 5515-X Firmware | =009.015\(001.016\) | |
| Cisco ASA 5515-X Firmware | =009.016\(001\) | |
| Cisco ASA 5515-X Firmware | ||
| Cisco ASA 5525-X Firmware | =009.012\(004.024\) | |
| Cisco ASA 5525-X Firmware | =009.015\(001\) | |
| Cisco ASA 5525-X Firmware | =009.015\(001.015\) | |
| Cisco ASA 5525-X Firmware | =009.015\(001.016\) | |
| Cisco ASA 5525-X Firmware | =009.016\(001\) | |
| Cisco ASA 5525-X firmware | ||
| Cisco ASA 5545-X firmware | =009.012\(004.024\) | |
| Cisco ASA 5545-X firmware | =009.015\(001\) | |
| Cisco ASA 5545-X firmware | =009.015\(001.015\) | |
| Cisco ASA 5545-X firmware | =009.015\(001.016\) | |
| Cisco ASA 5545-X firmware | =009.016\(001\) | |
| Cisco ASA 5545-X firmware | ||
| Cisco ASA 5555-X Firmware | =009.012\(004.024\) | |
| Cisco ASA 5555-X Firmware | =009.015\(001\) | |
| Cisco ASA 5555-X Firmware | =009.015\(001.015\) | |
| Cisco ASA 5555-X Firmware | =009.015\(001.016\) | |
| Cisco ASA 5555-X Firmware | =009.016\(001\) | |
| Cisco ASA 5555-x firmware | ||
| Cisco ASA 5580 Firmware | =009.012\(004.024\) | |
| Cisco ASA 5580 Firmware | =009.015\(001\) | |
| Cisco ASA 5580 Firmware | =009.015\(001.015\) | |
| Cisco ASA 5580 Firmware | =009.015\(001.016\) | |
| Cisco ASA 5580 Firmware | =009.016\(001\) | |
| Cisco ASA 5580 Firmware | ||
| Cisco ASA 5585-X | =009.012\(004.024\) | |
| Cisco ASA 5585-X | =009.015\(001\) | |
| Cisco ASA 5585-X | =009.015\(001.015\) | |
| Cisco ASA 5585-X | =009.015\(001.016\) | |
| Cisco ASA 5585-X | =009.016\(001\) | |
| Cisco ASA 5585-X |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-40118?
CVE-2021-40118 has been assigned a CVSS score indicating a high severity risk due to the potential for denial of service.
Who is affected by CVE-2021-40118?
CVE-2021-40118 affects users running vulnerable versions of Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software.
How do I fix CVE-2021-40118?
To fix CVE-2021-40118, users should update to the latest patched versions of the affected Cisco software.
What type of vulnerability is CVE-2021-40118?
CVE-2021-40118 is classified as a denial of service (DoS) vulnerability that can be exploited by unauthenticated remote attackers.
Can CVE-2021-40118 be exploited remotely?
Yes, CVE-2021-40118 can be exploited remotely by unauthenticated attackers to cause a denial of service condition.
- agent/type
- agent/weakness
- agent/references
- agent/description
- agent/severity
- agent/title
- agent/first-publish-date
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/tags
- agent/author
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-api
- vendor/cisco
- canonical/cisco adaptive security appliance software
- canonical/cisco firepower threat defense (ftd)
- version/cisco firepower threat defense (ftd)/6.5.0
- version/cisco firepower threat defense (ftd)/6.7.0
- version/cisco firepower threat defense (ftd)/7.0.0
- version/cisco adaptive security appliance software/9.9.0
- version/cisco adaptive security appliance software/9.13.0
- version/cisco adaptive security appliance software/9.15.0
- version/cisco adaptive security appliance software/9.16.0
- canonical/cisco asa 5512-x firmware
- version/cisco asa 5512-x firmware/009.012\(004.024\)
- version/cisco asa 5512-x firmware/009.015\(001\)
- version/cisco asa 5512-x firmware/009.015\(001.015\)
- version/cisco asa 5512-x firmware/009.015\(001.016\)
- version/cisco asa 5512-x firmware/009.016\(001\)
- canonical/cisco asa 5505 firmware
- version/cisco asa 5505 firmware/009.012\(004.024\)
- version/cisco asa 5505 firmware/009.015\(001\)
- version/cisco asa 5505 firmware/009.015\(001.015\)
- version/cisco asa 5505 firmware/009.015\(001.016\)
- version/cisco asa 5505 firmware/009.016\(001\)
- canonical/cisco asa 5505
- canonical/cisco asa 5515-x firmware
- version/cisco asa 5515-x firmware/009.012\(004.024\)
- version/cisco asa 5515-x firmware/009.015\(001\)
- version/cisco asa 5515-x firmware/009.015\(001.015\)
- version/cisco asa 5515-x firmware/009.015\(001.016\)
- version/cisco asa 5515-x firmware/009.016\(001\)
- canonical/cisco asa 5525-x firmware
- version/cisco asa 5525-x firmware/009.012\(004.024\)
- version/cisco asa 5525-x firmware/009.015\(001\)
- version/cisco asa 5525-x firmware/009.015\(001.015\)
- version/cisco asa 5525-x firmware/009.015\(001.016\)
- version/cisco asa 5525-x firmware/009.016\(001\)
- canonical/cisco asa 5545-x firmware
- version/cisco asa 5545-x firmware/009.012\(004.024\)
- version/cisco asa 5545-x firmware/009.015\(001\)
- version/cisco asa 5545-x firmware/009.015\(001.015\)
- version/cisco asa 5545-x firmware/009.015\(001.016\)
- version/cisco asa 5545-x firmware/009.016\(001\)
- canonical/cisco asa 5555-x firmware
- version/cisco asa 5555-x firmware/009.012\(004.024\)
- version/cisco asa 5555-x firmware/009.015\(001\)
- version/cisco asa 5555-x firmware/009.015\(001.015\)
- version/cisco asa 5555-x firmware/009.015\(001.016\)
- version/cisco asa 5555-x firmware/009.016\(001\)
- canonical/cisco asa 5580 firmware
- version/cisco asa 5580 firmware/009.012\(004.024\)
- version/cisco asa 5580 firmware/009.015\(001\)
- version/cisco asa 5580 firmware/009.015\(001.015\)
- version/cisco asa 5580 firmware/009.015\(001.016\)
- version/cisco asa 5580 firmware/009.016\(001\)
- canonical/cisco asa 5585-x
- version/cisco asa 5585-x/009.012\(004.024\)
- version/cisco asa 5585-x/009.015\(001\)
- version/cisco asa 5585-x/009.015\(001.015\)
- version/cisco asa 5585-x/009.015\(001.016\)
- version/cisco asa 5585-x/009.016\(001\)