Privilege escalation on some Intel processors in F5 BIG-IP

1) Out-of-bounds write

EUVDB-ID: #VU63082

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-0153

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the BIOS firmware. A local user can  run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

The following F5 hardware platforms are vulnerable:

• BIG-IP i5000 series
• BIG-IP i7000 series
• BIG-IP i10000 series
• BIG-IP i11000 series
• BIG-IP i15000 series
• VIPRION B4450N

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

Vulnerable software versions

BIG-IP: 13.0.0 - 17.1.1.3

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:14.1.5.6  hotfix-bigip-14.1.5.6.0.10.6-eng3:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:16.1.5:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:15.1.10.4:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:17.1.1.3:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:13.1.5.1: hotfix-bigip-13.1.5.1.0.20.2-eng3:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:17.0.0.2:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:16.0.1.2:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:13.0.1:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:15.0.1.4:*:*:*:*:*:*:
• cpe:2.3:h:f5_networks:big-ip:14.0.1.1:*:*:*:*:*:*:

External links

http://my.f5.com/manage/s/article/K14454359

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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