QID 317091

Date Published: 2021-10-29

QID 317091: Cisco Adaptive Security Appliance Software (ASA) SSL/TLS Denial of Service (DoS) Vulnerability (cisco-sa-asaftd-dos-4ygzLKU9)

A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software
could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

Affected Products
Cisco products if they are running a vulnerable release of Cisco ASA Software and have a vulnerable AnyConnect or WebVPN configured.
Vulnerable Versions:
Prior to 9.8.4.40
From 9.9 Prior to 9.12.4.26
From 9.13 Prior to 9.14.3.9
From 9.15 Prior to 9.15.1.17

QID Detection Logic (Authenticated):
The check matches Cisco ASA OS version retrieved via Unix Auth using "version" command.

A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as High - 7.8 severity.
    • Solution

    Customers are advised to refer to cisco-sa-asaftd-dos-4ygzLKU9 for more information.

    Vendor References

    CVEs related to QID 317091

    CVE-2021-40117 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-asaftd-dos-4ygzLKU9 URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9
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