QID 317184

Date Published: 2022-05-05

QID 317184: Cisco Adaptive Security Appliance (ASA) Clientless Secure Sockets Layer (SSL) Virtual Private Network (VPN) Heap Overflow Vulnerability (cisco-sa-asa-ssl-vpn-heap-zLX3FdX)

A vulnerability in the handler for HTTP authentication for resources accessed through the Clientless SSL VPN portal of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device or to obtain portions of process memory from an affected device.

Affected Products:
This vulnerability affects Cisco products if they are running a vulnerable release of Cisco ASA Software and have Clientless SSL VPN configured.
This vulnerability is due to insufficient bounds checking when parsing specific HTTP authentication messages.

An attacker could exploit this vulnerability by sending malicious traffic to an affected device acting as a VPN Gateway.

  • CVSS V3 rated as High - 7.1 severity.
  • CVSS V2 rated as High - 7 severity.
    • Solution
    Refer to Cisco ASA advisory cisco-sa-asa-ssl-vpn-heap-zLX3FdX for updates and patch information.

    Vendor References

    CVEs related to QID 317184

    CVE-2022-20737 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-asa-ssl-vpn-heap-zLX3FdX URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ssl-vpn-heap-zLX3FdX
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