cisco-sa-20190710-asa-ftd-dos: Cisco ASA and FTD Software Cryptographic TLS and SSL Driver Denial of Service Vulnerability
First published: Wed Jul 10 2019(Updated: )
A vulnerability in the cryptographic driver for Cisco Adaptive Security Appliance Software (ASA) and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reboot unexpectedly. The vulnerability is due to incomplete input validation of a Secure Sockets Layer (SSL) or Transport Layer Security (TLS) ingress packet header. An attacker could exploit this vulnerability by sending a crafted TLS/SSL packet to an interface on the targeted device. An exploit could allow the attacker to cause the device to reload, which will result in a denial of service (DoS) condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed and transparent firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic. A valid SSL or TLS session is required to exploit this vulnerability. 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-20190710-asa-ftd-dos
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA | =9.12<9.12.2=9.10<9.10.1.22>=9.7=9.8<=9.9<9.9.2.52=9.6<9.6.4.29=9.5<9.6.4.29=9.4<9.4.4.36=Prior to 9.4<9.4.4.36 | 9.12.2 9.10.1.22 9.9.2.52 9.6.4.29 9.6.4.29 9.4.4.36 9.4.4.36 |
| Cisco Firepower Threat Defense | =6.3.0<Cisco_FTD_Hotfix_AA-6.3.0.4-2 or 6.3.0.4 (August 2019)=6.2.3<6.2.3.13=6.2.2<6.2.3.13=6.2.1<6.2.3.13=6.2.0<6.2.3.13=6.1.0<6.2.3.13=6.0.1<6.2.3.13=6.0<6.2.3.13 | Cisco_FTD_Hotfix_AA-6.3.0.4-2 or 6.3.0.4 (August 2019) 6.2.3.13 6.2.3.13 6.2.3.13 6.2.3.13 6.2.3.13 6.2.3.13 6.2.3.13 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190710-asa-ftd-dos?
The severity of cisco-sa-20190710-asa-ftd-dos is high due to the potential for unauthorized remote access leading to device reboot.
How do I fix cisco-sa-20190710-asa-ftd-dos?
To fix cisco-sa-20190710-asa-ftd-dos, update your Cisco ASA or FTD software to the recommended versions or apply the provided hotfixes.
What impacts can cisco-sa-20190710-asa-ftd-dos have on affected devices?
cisco-sa-20190710-asa-ftd-dos can cause the affected Cisco devices to reboot unexpectedly, leading to potential service disruptions.
Who is affected by cisco-sa-20190710-asa-ftd-dos?
Users with Cisco ASA Software versions prior to 9.12.2 and Cisco FTD Software versions prior to 6.3.0 are affected by cisco-sa-20190710-asa-ftd-dos.
Is cisco-sa-20190710-asa-ftd-dos a remote vulnerability?
Yes, cisco-sa-20190710-asa-ftd-dos is a remote vulnerability that can be exploited by unauthenticated attackers.
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