Vulnerability identifier: #VU54287

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3565

CWE-ID: CWE-321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
tpm2-tools
Other software / Other software solutions

Vendor: Linux TPM2 & TSS2 Software

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to usage of a fixed AES key in the tpm2_import function. A remote attacker can perform MitM attack and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

tpm2-tools: 4.0 - 5.1

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1964427
http://github.com/tpm2-software/tpm2-tools/releases/tag/4.3.2
http://github.com/tpm2-software/tpm2-tools/releases/tag/5.1.1

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.