SB2022042736 - Heap overflow in Cisco Adaptive Security Appliance SSL VPN
Published: April 27, 2022
Security Bulletin ID
SB2022042736
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2022-20737)
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.