Remote denial of service in BIG-IP SNMP

1) Memory leak

EUVDB-ID: #VU103719

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21091

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when SNMP v1 or v2c are disabled. A remote attacker can send specially crafted packets to the system and perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 15.0.0 - 17.1.1.4

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:15.0.1.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:15.1.10.6.0.11:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.0.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.5.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:17.0.0.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:17.1.1.4:*:*:*:*:*:*:*

External links

http://my.f5.com/manage/s/article/K000140933

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.