Denial of service in F5 BIG-IP BIND

1) Resource exhaustion

EUVDB-ID: #VU57752

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-25219

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to BIND does not properly control consumption of internal resources when processing lame cache. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BIG-IP: 11.6.1 HF1 - 16.1.2

BIG-IQ Centralized Management: 8.0.0 - 8.1.0

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:11.6.5.3:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:12.1.6:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:13.1.4.1:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:14.1.4.4:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:15.1.4:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:16.1.2:*:*:*:*:*:*:
• cpe:2.3:a:f5_networks:big-iq:8.0.0:*:*:*:*:*:*:
• cpe:2.3:a:f5_networks:big-iq:8.0.0.1:*:*:*:*:*:*:
• cpe:2.3:a:f5_networks:big-iq:8.1.0:*:*:*:*:*:*:

External links

http://support.f5.com/csp/article/K77326807

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.