CVE-2020-3572: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Session Denial of Service Vulnerability
First published: Wed Oct 21 2020(Updated: )
A vulnerability in the SSL/TLS session handler of 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. The vulnerability is due to a memory leak when closing SSL/TLS connections in a specific state. An attacker could exploit this vulnerability by establishing several SSL/TLS sessions and ensuring they are closed under certain conditions. A successful exploit could allow the attacker to exhaust memory resources in the affected device, which would prevent it from processing new SSL/TLS connections, resulting in a DoS. Manual intervention is required to recover an affected device.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance | <9.6 | |
| Cisco Firepower Threat Defense | <6.3.0.6 | |
| Cisco Firepower Threat Defense | >=6.4.0<6.4.0.10 | |
| Cisco Firepower Threat Defense | >=6.5.0<6.6.1 | |
| Cisco Adaptive Security Appliance Software | >=9.8.0<9.8.4.26 | |
| Cisco Adaptive Security Appliance Software | >=9.9.0<9.9.2.80 | |
| Cisco Adaptive Security Appliance Software | >=9.10.0<9.10.1.44 | |
| Cisco Adaptive Security Appliance Software | >=9.12.0<9.12.4.4 | |
| Cisco Adaptive Security Appliance Software | >=9.13.0<9.13.1.13 | |
| Cisco Adaptive Security Appliance Software | >=9.14.0<9.14.1.19 |
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Reference Links
- collector/nvd-api
- collector/nvd-index
- agent/weakness
- agent/author
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/title
- agent/last-modified-date
- agent/references
- agent/first-publish-date
- agent/tags
- agent/description
- agent/event
- vendor/cisco
- canonical/cisco adaptive security appliance
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/6.4.0
- version/cisco firepower threat defense/6.5.0
- canonical/cisco adaptive security appliance software
- version/cisco adaptive security appliance software/9.8.0
- version/cisco adaptive security appliance software/9.9.0
- version/cisco adaptive security appliance software/9.10.0
- version/cisco adaptive security appliance software/9.12.0
- version/cisco adaptive security appliance software/9.13.0
- version/cisco adaptive security appliance software/9.14.0