Denial of Service Vulnerability in Cisco ASA and FTD SSL VPN
CVE-2023-20042

7.5HIGH

Key Information:

Vendor

Cisco
Status
Cisco Adaptive Security Appliance (ASA) Software
Cisco Firepower Threat Defense Software
Vendor
CVE Published:
1 November 2023

What is CVE-2023-20042?

A flaw in the SSL VPN functionality of Cisco Adaptive Security Appliance and Cisco Firepower Threat Defense allows an unauthenticated remote attacker to craft specific SSL/TLS traffic that disrupts the session handling process. This exploitation could lead to a depletion of session handlers, resulting in a denial of service condition on the affected device, thus hindering the establishment of new sessions.

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Affected Version(s)

Cisco Adaptive Security Appliance (ASA) Software 9.16.1

Cisco Adaptive Security Appliance (ASA) Software 9.16.1.28

Cisco Adaptive Security Appliance (ASA) Software 9.16.2

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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