#VU71207 Out-of-bounds read in Trusted Firmware-A - CVE-2022-47630

Vulnerability identifier: #VU71207

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-47630

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Trusted Firmware-A
Hardware solutions / Firmware

Vendor: Linaro Limited

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 rc0 - 2.8.0

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

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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.