#VU54503 Stack-based buffer overflow in libtpms - CVE-2021-3569

Vulnerability identifier: #VU54503

Vulnerability risk: Low

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

CVE-ID: CVE-2021-3569

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libtpms
Universal components / Libraries / Libraries used by multiple products

Vendor: Stefan Berger

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in libtpms while decrypting data using RSA. A local user can trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libtpms: 0.5.2 - 0.7.1

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1964358

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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.