Vulnerability Monitor

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CVE-2021-3623

A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts limited data confidentiality, and availability (service disruption) for affected systems. Impacting 3 products from libtpms_project, from redhat, from fedoraproject organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-03-02T23:15:08.623

Last Modified

2024-11-21T06:22:00.440

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.1 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

4.9

Weaknesses

Type: Secondary
CWE-787
Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libtpms_project	libtpms	< 0.6.5	Yes
Application	libtpms_project	libtpms	< 0.7.8	Yes
Application	libtpms_project	libtpms	< 0.8.4	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	fedoraproject	fedora	34	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=1976806 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/stefanberger/libtpms/commit/2e6173c Patch, Third Party Advisory ([email protected])
https://github.com/stefanberger/libtpms/commit/2f30d62 Patch, Third Party Advisory ([email protected])
https://github.com/stefanberger/libtpms/commit/7981d9a Patch, Third Party Advisory ([email protected])
https://github.com/stefanberger/libtpms/pull/223 Issue Tracking, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/ ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1976806 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/stefanberger/libtpms/commit/2e6173c Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/stefanberger/libtpms/commit/2f30d62 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/stefanberger/libtpms/commit/7981d9a Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/stefanberger/libtpms/pull/223 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/ (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For libtpms_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.