Denial of service in BIG-IP TMM



Published: 2021-04-29

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU52749

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23009

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The vulnerability exists due to infinite loop when processing HTTP/2 requests in TMM module. A remote attacker can send specially crafted HTTP/2 packets to the system and cause a denial of service condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 15.1.0 - 16.0.1

BIG-IP LTM: 15.1.0 - 16.0.1

BIG-IP AAM: 15.1.0 - 16.0.1

BIG-IP Advanced WAF: 15.1.0 - 16.0.1

BIG-IP AFM: 15.1.0 - 16.0.1

BIG-IP Analytics: 15.1.0 - 16.0.1

BIG-IP APM: 15.1.0 - 16.0.1

BIG-IP ASM: 15.1.0 - 16.0.1

BIG-IP DDHD: 15.1.0 - 16.0.1

BIG-IP DNS: 15.1.0 - 16.0.1

BIG-IP FPS: 15.1.0 - 16.0.1

BIG-IP GTM: 15.1.0 - 16.0.1

BIG-IP Link Controller: 15.1.0 - 16.0.1

BIG-IP PEM: 15.1.0 - 16.0.1

BIG-IP SSLO: 15.1.0 - 16.0.1


CPE2.3 External links

http://support.f5.com/csp/article/K90603426

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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