Hardcoded AES key in tpm2-tools



Published: 2021-06-21
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3565
CWE-ID CWE-321
Exploitation vector Network
Public exploit N/A
Vulnerable software
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tpm2-tools
Other software / Other software solutions

Vendor Linux TPM2 & TSS2 Software

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use of Hard-coded Cryptographic Key

EUVDB-ID: #VU54287

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 - Use of Hard-coded Cryptographic Key

Exploit availability: No

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

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


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.



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