Vulnerability in Libtpms Project
CVE-2021-3446
A flaw was found in libtpms in versions before 0.8.2. The commonly used integration of libtpms with OpenSSL 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. The highest threat from this vulnerability is to data confidentiality.
Vulnerability class: POODLE (CVE-2014-3566)
EPSS: 0.001 (4.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Libtpms_project Libtpms
- Fedoraproject Fedora — versions 33
- Redhat Enterprise_linux — versions 8.0
- N/a Libtpms — versions libtpms 0.8.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2021-3446?
- CVE-2021-3446 is a medium-severity vulnerability in Libtpms Project, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 5.5/10. Published 2021-03-25.
- How severe is CVE-2021-3446?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-3446 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.