CVE-2021-3623 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Reference

https://github.com/stefanberger/libtpms/pull/223 https://github.com/stefanberger/libtpms/commit/2e6173c https://github.com/stefanberger/libtpms/commit/7981d9a https://github.com/stefanberger/libtpms/commit/2f30d62 https://bugzilla.redhat.com/show_bug.cgi?id=1976806 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

HIGH

Base Severity

8.2