CVE-2021-3446
MEDIUM
Published Mar 25, 20215y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Published Mar 25, 2021 5y ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None
Threat Intelligence
No active exploitation signals — not in CISA KEV and no EPSS score yet.
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 2
CWE-327
CWE-330
Affected Products 3
| Vendor | Product | Version | Range |
|---|---|---|---|
| libtpms_project | libtpms | * | <0.8.2 |
| redhat | enterprise_linux | 8.0 | any |
| fedoraproject | fedora | 33 | any |
References 1
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1939664
Remediation
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1939664