QID 317090

Date Published: 2021-10-28

QID 317090: Cisco Adaptive Security Appliance (ASA) Software Denial of Service (DoS) Vulnerability (cisco-sa-asa-ftd-dos-JxYWMJyL)

A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability.

Affected Products
Cisco Adaptive Security Appliance (ASA) Software releases:
From 9.8 Prior to 9.8.4.40
From 9.12 Prior to 9.12.4.24
From 9.14 Prior to 9.14.2.15
From 9.15 Prior to 9.15.1.15

QID detection logic:
The QID checks for Cisco ASA version retrieved via Unix Auth using "show version" command.

A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.

  • CVSS V3 rated as Critical - 8.6 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution

    Customers are advised to refer to cisco-sa-asa-ftd-dos-JxYWMJyL for more information.

    Vendor References

    CVEs related to QID 317090

    CVE-2021-34793 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-asa-ftd-dos-JxYWMJyL URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL
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