Bug 1212968 (CVE-2023-2861)

Summary:	VUL-0: CVE-2023-2861: qemu,kvm: 9pfs: improper access control on special files
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Robert Frohl <rfrohl>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	claudio.fontana, dfaggioli, rfrohl, security-team
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/371097/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-2861:7.5:(AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Robert Frohl 2023-07-04 07:15:57 UTC

CVE-2023-2861

The 9p protocol does not specifically define how server shall behave when client tries to open a special file, however from security POV it does make sense for 9p server to prohibit opening any special file on host side in general. A sane Linux 9p client for instance would never attempt to open a special file on host side, it would always handle those exclusively on its guest side. A malicious client however could potentially escape from the exported 9p tree by creating and opening a device file on host side.

https://gitlab.com/qemu-project/qemu/-/commit/f6b0de53fb87ddefed348a39284c8e2f28dc4eda

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-2861
https://bugzilla.redhat.com/show_bug.cgi?id=2219266

Comment 8 Maintenance Automation 2023-07-28 20:30:23 UTC

SUSE-SU-2023:3015-1: An update that solves three vulnerabilities can now be installed.

Category: security (important)
Bug References: 1198037, 1207205, 1212968
CVE References: CVE-2021-4207, CVE-2023-0330, CVE-2023-2861
Sources used:
SUSE Linux Enterprise High Performance Computing 12 SP5 (src): qemu-3.1.1.1-69.1
SUSE Linux Enterprise Server 12 SP5 (src): qemu-3.1.1.1-69.1
SUSE Linux Enterprise Server for SAP Applications 12 SP5 (src): qemu-3.1.1.1-69.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 9 Maintenance Automation 2023-08-01 08:45:05 UTC

SUSE-SU-2023:3082-1: An update that solves four vulnerabilities and has two fixes can now be installed.

Category: security (important)
Bug References: 1179993, 1181740, 1207205, 1212968, 1213001, 1213414
CVE References: CVE-2023-0330, CVE-2023-2861, CVE-2023-3255, CVE-2023-3301
Sources used:
Server Applications Module 15-SP5 (src): qemu-7.1.0-150500.49.6.1
openSUSE Leap 15.5 (src): qemu-linux-user-7.1.0-150500.49.6.1, qemu-7.1.0-150500.49.6.1
Basesystem Module 15-SP5 (src): qemu-7.1.0-150500.49.6.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 11 Maintenance Automation 2023-08-08 20:30:44 UTC

SUSE-SU-2023:3234-1: An update that solves three vulnerabilities can now be installed.

Category: security (important)
Bug References: 1212968, 1213001, 1213414
CVE References: CVE-2023-2861, CVE-2023-3255, CVE-2023-3301
Sources used:
openSUSE Leap 15.4 (src): qemu-linux-user-6.2.0-150400.37.20.1, qemu-6.2.0-150400.37.20.1
openSUSE Leap Micro 5.3 (src): qemu-6.2.0-150400.37.20.1
openSUSE Leap Micro 5.4 (src): qemu-6.2.0-150400.37.20.1
SUSE Linux Enterprise Micro for Rancher 5.3 (src): qemu-6.2.0-150400.37.20.1
SUSE Linux Enterprise Micro 5.3 (src): qemu-6.2.0-150400.37.20.1
SUSE Linux Enterprise Micro for Rancher 5.4 (src): qemu-6.2.0-150400.37.20.1
SUSE Linux Enterprise Micro 5.4 (src): qemu-6.2.0-150400.37.20.1
Basesystem Module 15-SP4 (src): qemu-6.2.0-150400.37.20.1
Server Applications Module 15-SP4 (src): qemu-6.2.0-150400.37.20.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 12 Claudio Fontana 2023-08-29 08:20:29 UTC

assigning to ZhangLi to take care of:

- SUSE:SLE-12-SP4:Update/qemu
- SUSE:SLE-15-SP1:Update/qemu
- SUSE:SLE-15-SP2:Update/qemu
- SUSE:SLE-15-SP3:Update/qemu

Comment 13 OBSbugzilla Bot 2023-09-12 14:05:28 UTC

This is an autogenerated message for OBS integration:
This bug (1212968) was mentioned in
https://build.opensuse.org/request/show/1110620 Factory / qemu

Comment 14 Li Zhang 2023-09-13 13:53:57 UTC

(In reply to Claudio Fontana from comment #12)
> assigning to ZhangLi to take care of:
> 
> - SUSE:SLE-12-SP4:Update/qemu
> - SUSE:SLE-15-SP1:Update/qemu
> - SUSE:SLE-15-SP2:Update/qemu
> - SUSE:SLE-15-SP3:Update/qemu

I have backported to these versions. 
- SUSE:SLE-15-SP1:Update/qemu
- SUSE:SLE-15-SP2:Update/qemu
- SUSE:SLE-15-SP3:Update/qemu

SLE12-SP4 was maintained as LTSS(30 Jun 2023). 
I think it's been out of date, I didn't backport this version.

Comment 18 Maintenance Automation 2023-09-21 08:30:02 UTC

SUSE-SU-2023:3721-1: An update that solves 10 vulnerabilities and has one security fix can now be installed.

Category: security (important)
Bug References: 1172382, 1188609, 1190011, 1193880, 1197653, 1198712, 1207205, 1212850, 1212968, 1213925, 1215311
CVE References: CVE-2020-13754, CVE-2021-3638, CVE-2021-3750, CVE-2021-3929, CVE-2022-1050, CVE-2022-26354, CVE-2023-0330, CVE-2023-2861, CVE-2023-3180, CVE-2023-3354
Sources used:
openSUSE Leap 15.4 (src): qemu-4.2.1-150200.79.1
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2 (src): qemu-4.2.1-150200.79.1
SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (src): qemu-4.2.1-150200.79.1
SUSE Linux Enterprise Server for SAP Applications 15 SP2 (src): qemu-4.2.1-150200.79.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 19 Maintenance Automation 2023-09-27 12:30:07 UTC

SUSE-SU-2023:3800-1: An update that solves nine vulnerabilities and has one security fix can now be installed.

Category: security (important)
Bug References: 1172382, 1190011, 1193880, 1197653, 1198712, 1207205, 1212850, 1212968, 1213925, 1215311
CVE References: CVE-2019-13754, CVE-2021-3750, CVE-2021-3929, CVE-2022-1050, CVE-2022-26354, CVE-2023-0330, CVE-2023-2861, CVE-2023-3180, CVE-2023-3354
Sources used:
SUSE CaaS Platform 4.0 (src): qemu-3.1.1.1-150100.80.51.5
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS 15-SP1 (src): qemu-3.1.1.1-150100.80.51.5
SUSE Linux Enterprise Server 15 SP1 LTSS 15-SP1 (src): qemu-3.1.1.1-150100.80.51.5
SUSE Linux Enterprise Server for SAP Applications 15 SP1 (src): qemu-3.1.1.1-150100.80.51.5

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 20 Maintenance Automation 2023-11-15 16:30:01 UTC

SUSE-SU-2023:3082-2: An update that solves four vulnerabilities and has two security fixes can now be installed.

Category: security (important)
Bug References: 1179993, 1181740, 1207205, 1212968, 1213001, 1213414
CVE References: CVE-2023-0330, CVE-2023-2861, CVE-2023-3255, CVE-2023-3301
Sources used:
SUSE Linux Enterprise Micro 5.5 (src): qemu-7.1.0-150500.49.6.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.