medium
5.3
CWE
863
Advisory Published

cisco-sa-asaftd-rule-bypass-P73ABNWQ: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Portal Access Rule Bypass 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 web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured access rule and access parts of the WebVPN portal that are supposed to be blocked. The vulnerability is due to insufficient validation of URLs when portal access rules are configured. An attacker could exploit this vulnerability by accessing certain URLs on 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-rule-bypass-P73ABNWQ

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<9.12.4.4=9.10<9.10.1.44=9.9<9.9.2.80>=9.7<=9.8<9.8.4.26>=Earlier than 9.6<=9.6<9.6.4.45
9.14.1.19
9.13.1.13
9.12.4.4
9.10.1.44
9.9.2.80
9.8.4.26
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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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco ASA and FTD software vulnerability?

    The vulnerability ID for this Cisco ASA and FTD software vulnerability is cisco-sa-asaftd-rule-bypass-P73ABNWQ.

  • Which Cisco software versions are affected by this vulnerability?

    This vulnerability affects Cisco ASA Software versions 9.6 and earlier, and Cisco FTD Software versions earlier than 6.4.0.

  • What is the severity of the Cisco ASA and FTD software vulnerability?

    The severity of this Cisco ASA and FTD software vulnerability is medium, with a CVSS score of 5.3.

  • What is the recommended fixed software for this vulnerability?

    The recommended fixed software for this vulnerability is Cisco ASA Software versions 9.14.1.19, 9.13.1.13, 9.12.4.4, 9.10.1.44, 9.9.2.80, 9.8.4.26, and 9.6.4.45, and Cisco FTD Software version 6.4.0.10.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the Cisco Security Advisory page at the following link: [Cisco Security Advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-rule-bypass-P73ABNWQ)

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