Information disclosure in Trusted Firmware-A

1) Out-of-bounds read

EUVDB-ID: #VU71207

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-47630

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition in the X.509 parser used to parse boot certificates in TF-A trusted boot. A local user can supply a specially crafted X.509 certificate to trigger an out-of-bounds read and gain access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Trusted Firmware-A: 1.2 - 2.8.0

External links

http://trustedfirmware-a.readthedocs.io/en/latest/security_advisories/security-advisory-tfv-10.html
http://www.openwall.com/lists/oss-security/2023/01/16/8

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.