Vulnerability identifier: #VU54504

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3623

CWE-ID: CWE-125

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 crash the system.

The vulnerability exists due to a boundary condition. A local user can use specially-crafted TPM 2 command packets containing illegal values to trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libtpms: 0.5.2 - 0.8.3

---

External links
http://bugzilla.redhat.com/show_bug.cgi?id=1976806

---

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.