SB2021042914 - Denial of service when processing WebSocket requests in BIG-IP ASM and Advanced WAF
Published: April 29, 2021
Security Bulletin ID
SB2021042914
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2021-23010)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing WebSocket requests with JSON payloads using the default JSON content profile in the ASM security policy. A remote attacker can pass specially crafted input to the system and crash the BIG-IP ASM bd process.
Remediation
Install update from vendor's website.