#VU54501 Use of a broken or risky cryptographic algorithm in libtpms - CVE-2021-3446
Published: July 1, 2021
Vulnerability identifier: #VU54501
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3446
CWE-ID: CWE-327
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libtpms
libtpms
Software vendor:
Stefan Berger
Stefan Berger
Description
The vulnerability allows a remote attacker to decrypt data.
The vulnerability exists in libtpms due to integration with OpenSSL, which contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps.
Remediation
Install updates from vendor's website.