#VU77293 Buffer overflow in libtpms - CVE-2021-3746

Vulnerability identifier: #VU77293

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3746

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: Stefan Berger

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error. A remote attacker can trick the victim into opening a specially-crafted TPM2 command packets, trigger memory corruption and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libtpms: 0.6.0 - 0.6.6, 0.7.0 - 0.7.9, 0.8.0 - 0.8.5

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1998588

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?