medium
6.8
CWE
404
Advisory Published

cisco-sa-asaftd-sipdos-3DGvdjvg: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SIP 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 SIP inspection process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a watchdog timeout and crash during the cleanup of threads that are associated with a SIP connection that is being deleted from the connection list. An attacker could exploit this vulnerability by sending a high rate of crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a watchdog timeout and crash, resulting in a crash and reload of the affected device. 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-sipdos-3DGvdjvg

Credit: This vulnerability was found during the resolution a Cisco TAC support case

Affected SoftwareAffected VersionHow to fix
Cisco ASA Software=9.14<9.14.1.19=9.13<9.13.1.13=9.12<9.12.4.2=9.10<9.10.1.43=9.9<9.9.2.80>=9.7<=9.8<9.8.4.26>=Earlier than 9.6<=9.6<9.6.4.43
9.14.1.19
9.13.1.13
9.12.4.2
9.10.1.43
9.9.2.80
9.8.4.26
9.6.4.43
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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Frequently Asked Questions

  • What is the vulnerability ID for this Cisco ASA Software and FTD Software SIP Denial of Service vulnerability?

    The vulnerability ID for this Cisco ASA Software and FTD Software SIP Denial of Service vulnerability is cisco-sa-asaftd-sipdos-3DGvdjvg.

  • What is the severity level of cisco-sa-asaftd-sipdos-3DGvdjvg?

    The severity level of cisco-sa-asaftd-sipdos-3DGvdjvg is medium.

  • Which software versions are affected by this vulnerability?

    The Cisco ASA Software versions from 9.6 up to and including 9.8.4.26, and the Cisco FTD Software versions earlier than 6.4.0.10 are affected by this vulnerability.

  • How can I fix the Cisco ASA Software and FTD Software SIP Denial of Service vulnerability?

    To fix the vulnerability, it is recommended to upgrade to the fixed releases specified in the 'Fixed Software' section of the advisory provided by Cisco.

  • Where can I find more information about this vulnerability?

    More information about this vulnerability can be found in the Cisco advisory at the following link: [link](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-sipdos-3DGvdjvg)

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