SB2022042736 - Heap overflow in Cisco Adaptive Security Appliance SSL VPN

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Main Vulnerability Database SB2022042736

SB2022042736 - Heap overflow in Cisco Adaptive Security Appliance SSL VPN

Published: April 27, 2022

Security Bulletin ID SB2022042736
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2022-20737)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when parsing specific HTTP authentication messages in the handler for HTTP authentication for resources accessed through the Clientless SSL VPN portal. A remote authenticated user can send specially crafted traffic to the device acting as a VPN Gateway, trigger a heap-based buffer overflow and gain access to sensitive information or perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References