Privilege escalation in Phoenix BIOS firmware

1) Input validation error

EUVDB-ID: #VU83976

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-5058

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input. A local user with write access to the ESP of the victim device can exploit by storing a maliciously crafted logo image.

The vulnerability was dubbed LogoFAIL.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIOS firmware: All versions

CPE2.3

• cpe:2.3:h:phoenix_technologies:bios:*:*:*:*:*:*:*:*

External links

https://support.lenovo.com/us/en/product_security/LEN-145284
https://binarly.io/posts/finding_logofail_the_dangers_of_image_parsing_during_system_boot/index.html

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.