Hertzbleed vulnerability in F5 BIG-IP on AMD processors

1) Observable discrepancy

EUVDB-ID: #VU64396

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-23823

CWE-ID: CWE-203 - Observable discrepancy

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to observable discrepancy. A remote authenticated attacker can perform  timing attack to gain access to sensitive information.

The vulnerability is dubbed Hertzbleed.

Mitigation

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

Vulnerable software versions

BIG-IP: 13.0.0 HF1 - 17.1.2.1

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:13.0.1:*:*:*:*:*:*:*
• 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:14.0.1.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:14.1.5.6:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:15.0.1.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:15.1.10.6.0.11.6:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.0.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.5.2.0.7.5:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:17.0.0.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:17.1.2.1:*:*:*:*:*:*:*

External links

http://my.f5.com/manage/s/article/K43357358

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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