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CVE-2021-3623

Date: March 2, 2022

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.

Language: C

Severity Score

Related Resources (11)

https://github.com/stefanberger/libtpms/commit/2f30d62
https://security-tracker.debian.org/tracker/CVE-2021-3623
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3623
https://bugzilla.redhat.com/show_bug.cgi?id=1976806
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/
https://nvd.nist.gov/vuln/detail/CVE-2021-3623
https://github.com/stefanberger/libtpms/commit/2e6173c
https://github.com/stefanberger/libtpms/pull/223
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/
https://github.com/stefanberger/libtpms/commit/7981d9a
https://www.mend.io/vulnerability-database/CVE-2021-3623

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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