Bug 1219903 (CVE-2023-31347)

Summary:	VUL-0: CVE-2023-31347: kernel-firmware: Due to a code bug in Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a guest to observe an incorrect TSC when Secure TSC is enabled potentially resulting in a loss of guest integrity.
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Minor
Priority:	P3 - Medium	CC:	ddavis, thomas.leroy
Version:	unspecified	Flags:	tiwai: needinfo? (ddavis)
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/393994/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-31347:2.3:(AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-02-14 08:28:08 UTC

Due to a code bug in
Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a
guest to observe an incorrect TSC when Secure TSC is enabled potentially
resulting in a loss of guest integrity.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-31347
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3007
https://www.cve.org/CVERecord?id=CVE-2023-31347

Comment 7 Thomas Leroy 2024-02-20 16:46:45 UTC

Many thanks Darren for checking!
This will be fixed by a manufacturer BIOS update. Closing