Denial of service when processing RADIUS authentication requests in BIG-IP APM

1) Memory leak

EUVDB-ID: #VU46070

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5924

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due memory leak during RADIUS authentication, when username is not set. A remote attacker can send specially crafted request to the device and consume excessive memory resources.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIG-IP APM: 11.2.1 - 12.1.5.1

External links

http://api-u.f5.com/support/kb-articles/K11400411?cacheFlag=false

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.