CVE-2022-23645 Information

Description

swtpm is a libtpms-based TPM emulator with socket character device and Linux CUSE interface. Versions prior to 0.5.3 0.6.2 and 0.7.1 are vulnerable to out-of-bounds read. A specially crafted header of swtpm’s state where the blobheader’s hdrsize indicator has an invalid value may cause an out-of-bounds access when the byte array representing the state of the TPM is accessed. This will likely crash swtpm or prevent it from starting since the state cannot be understood. Users should upgrade to swtpm v0.5.3 v0.6.2 or v0.7.1 to receive a patch. There are currently no known workarounds.

CVSS Vector

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

Reference

https://github.com/stefanberger/swtpm/security/advisories/GHSA-2qgm-8xf4-3hqw https://github.com/stefanberger/swtpm/commit/9f740868fc36761de27df3935513bdebf8852d19 https://github.com/stefanberger/swtpm/releases/tag/v0.5.3 https://github.com/stefanberger/swtpm/releases/tag/v0.6.2 https://github.com/stefanberger/swtpm/releases/tag/v0.7.1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WL735FW266GO4C2JX4CJBOIOB7R7AY5A/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5