SB2021031604 - Denial of service in BIG-IP MPTCP

Description

This security bulletin contains information about 1 vulnerability.

1) Resource management error (CVE-ID: CVE-2021-23003)

CWE-ID: CWE-399 - Resource Management Errors

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

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

The vulnerability exists due to improper management of internal resources within the application when processing MPTCP traffic. A remote attacker can send specially crafted data to the system and force TMM to produce a core file, resulting in denial of service.

The vulnerability can be also triggered in rare circumstances by running the tmsh show conn command.

Remediation

Install update from vendor's website.

References

• https://support.f5.com/csp/article/K43470422