cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL VPN Direct Memory Access Denial of Service Vulnerability
First published: Wed Oct 21 2020(Updated: )
Update from October 22nd, 2020: Cisco has become aware of a new Cisco Adaptive Security Appliance vulnerability that could affect the fixed releases recommended for code trains 9.13 and 9.14 in the Fixed Software section of this advisory. See the Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability for additional information. A vulnerability in the SSL VPN negotiation process for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to inefficient direct memory access (DMA) memory management during the negotiation phase of an SSL VPN connection. An attacker could exploit this vulnerability by sending a steady stream of crafted Datagram TLS (DTLS) traffic to an affected device. A successful exploit could allow the attacker to exhaust DMA memory on the device and cause a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx This advisory is part of the October 2020 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication, which includes 17 Cisco Security Advisories that describe 17 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: October 2020 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | =9.14<9.14.1.30=9.13<9.13.1.13=9.12<9.12.4.4=9.10<9.10.1.44=9.9<9.9.2.80>=9.7<=9.8<9.8.4.29>=Earlier than 9.6<=9.6<9.6.4.45 | 9.14.1.30 9.13.1.13 9.12.4.4 9.10.1.44 9.9.2.80 9.8.4.29 9.6.4.45 |
| Cisco FTD Software | >=Earlier than 6.2.2=6.2.2=6.2.3=6.3.0<=6.4.0<6.4.0.10 | 6.4.0.10 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco ASA and FTD SSL VPN Direct Memory Access Denial of Service vulnerability?
The vulnerability ID for this Cisco ASA and FTD SSL VPN Direct Memory Access Denial of Service is cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx.
What is the severity rating of the vulnerability cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx?
The vulnerability cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx has a severity rating of 8.6 (high).
Which Cisco products and software versions are affected by the cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability?
The cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability affects Cisco ASA Software versions 9.14, 9.13, 9.12, 9.10, 9.9, 9.8, 9.6, and earlier versions, as well as Cisco FTD Software versions earlier than 6.2.2 and up to 6.4.0 (excluding 6.4.0.10).
How can I fix the cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability?
To fix the cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability, it is recommended to upgrade to the fixed software releases mentioned in the advisory.
Where can I find more information about the cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability?
You can find more information about the cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx vulnerability in the Cisco Security Advisory at the following URL: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx
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