CVE-2021-40117: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability
First published: Wed Oct 27 2021(Updated: )
A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance | <9.8.4.40 | |
| Cisco Firepower Threat Defense | <6.2.3.17 | |
| Cisco Firepower Threat Defense | >=6.3.0<6.4.0.13 | |
| Cisco Firepower Threat Defense | >=6.5.0<6.6.5 | |
| Cisco Firepower Threat Defense | >=6.7.0<6.7.0.3 | |
| Cisco Firepower Threat Defense | >=7.0.0<7.0.1 | |
| Cisco Adaptive Security Appliance Software | >=9.9.0<9.12.4.26 | |
| 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 | =009.009\(002.085\) | |
| Cisco Asa 5512-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5512-x | ||
| Cisco Asa 5505 Firmware | =009.009\(002.085\) | |
| Cisco Asa 5505 Firmware | =009.014\(002.106\) | |
| Cisco Asa 5505 | ||
| Cisco Asa 5515-x Firmware | =009.009\(002.085\) | |
| Cisco Asa 5515-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5515-x | ||
| Cisco Asa 5525-x Firmware | =009.009\(002.085\) | |
| Cisco Asa 5525-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5525-x | ||
| Cisco Asa 5545-x Firmware | =009.009\(002.085\) | |
| Cisco Asa 5545-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5545-x | ||
| Cisco Asa 5555-x Firmware | =009.009\(002.085\) | |
| Cisco Asa 5555-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5555-x | ||
| Cisco Asa 5580 Firmware | =009.009\(002.085\) | |
| Cisco Asa 5580 Firmware | =009.014\(002.106\) | |
| Cisco Asa 5580 | ||
| Cisco Asa 5585-x Firmware | =009.009\(002.085\) | |
| Cisco Asa 5585-x Firmware | =009.014\(002.106\) | |
| Cisco Asa 5585-x |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-40117.
What is the severity of CVE-2021-40117?
The severity of CVE-2021-40117 is high with a CVSS score of 7.5.
Which software is affected by CVE-2021-40117?
Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software are affected by CVE-2021-40117.
What is the impact of CVE-2021-40117?
CVE-2021-40117 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Where can I find more information about CVE-2021-40117?
You can find more information about CVE-2021-40117 in the Cisco Security Advisory: [link](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9).
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- agent/author
- agent/type
- collector/nvd-index
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/references
- agent/weakness
- agent/tags
- agent/title
- agent/last-modified-date
- agent/first-publish-date
- agent/description
- agent/event
- vendor/cisco
- canonical/cisco adaptive security appliance
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/6.3.0
- version/cisco firepower threat defense/6.5.0
- version/cisco firepower threat defense/6.7.0
- version/cisco firepower threat defense/7.0.0
- canonical/cisco adaptive security appliance software
- 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/009.009\(002.085\)
- version/cisco asa 5512-x firmware/009.014\(002.106\)
- canonical/cisco asa 5512-x
- canonical/cisco asa 5505 firmware
- version/cisco asa 5505 firmware/009.009\(002.085\)
- version/cisco asa 5505 firmware/009.014\(002.106\)
- canonical/cisco asa 5505
- canonical/cisco asa 5515-x firmware
- version/cisco asa 5515-x firmware/009.009\(002.085\)
- version/cisco asa 5515-x firmware/009.014\(002.106\)
- canonical/cisco asa 5515-x
- canonical/cisco asa 5525-x firmware
- version/cisco asa 5525-x firmware/009.009\(002.085\)
- version/cisco asa 5525-x firmware/009.014\(002.106\)
- canonical/cisco asa 5525-x
- canonical/cisco asa 5545-x firmware
- version/cisco asa 5545-x firmware/009.009\(002.085\)
- version/cisco asa 5545-x firmware/009.014\(002.106\)
- canonical/cisco asa 5545-x
- canonical/cisco asa 5555-x firmware
- version/cisco asa 5555-x firmware/009.009\(002.085\)
- version/cisco asa 5555-x firmware/009.014\(002.106\)
- canonical/cisco asa 5555-x
- canonical/cisco asa 5580 firmware
- version/cisco asa 5580 firmware/009.009\(002.085\)
- version/cisco asa 5580 firmware/009.014\(002.106\)
- canonical/cisco asa 5580
- canonical/cisco asa 5585-x firmware
- version/cisco asa 5585-x firmware/009.009\(002.085\)
- version/cisco asa 5585-x firmware/009.014\(002.106\)
- canonical/cisco asa 5585-x