Vulnerability Details : 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.
Products affected by CVE-2021-3446
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3446
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3446
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-3446
-
The product uses a broken or risky cryptographic algorithm or protocol.Assigned by: secalert@redhat.com (Secondary)
-
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-3446
-
https://bugzilla.redhat.com/show_bug.cgi?id=1939664
1939664 – (CVE-2021-3446) CVE-2021-3446 libtpms: return of wrong initialization vector when certain symmetric ciphers are usedIssue Tracking;Patch;Third Party Advisory
Jump to