SUSE update for xen

Published: 2023-03-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-42331 CVE-2022-42332
CWE-ID	CWE-1037 CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Server 12 SP2 BCL Operating systems & Components / Operating system SUSE Linux Enterprise Server 12 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 12 Operating systems & Components / Operating system xen-libs-debuginfo Operating systems & Components / Operating system package or component xen-tools-debuginfo Operating systems & Components / Operating system package or component xen-doc-html Operating systems & Components / Operating system package or component xen-tools-domU-debuginfo Operating systems & Components / Operating system package or component xen-debugsource Operating systems & Components / Operating system package or component xen-libs-debuginfo-32bit Operating systems & Components / Operating system package or component xen-tools Operating systems & Components / Operating system package or component xen-libs-32bit Operating systems & Components / Operating system package or component xen-libs Operating systems & Components / Operating system package or component xen-tools-domU Operating systems & Components / Operating system package or component xen Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Processor optimization removal or modification of security-critical code

EUVDB-ID: #VU73892

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42331

CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code

Exploit availability: No

Description

The vulnerability allows an attacker to escalate privileges on the system.

The vulnerability exists due to an oversight in the very original Spectre/Meltdown security work (XSA-254) caused by an unprotected RET instruction. An attacker with access to the guest OS can infer the contents of arbitrary host memory, including memory assigned to other guests.

Mitigation

Update the affected package xen to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise Server 12: SP2

SUSE Linux Enterprise High Performance Computing 12: SP2

xen-libs-debuginfo: before 4.7.6_32-43.104.1

xen-tools-debuginfo: before 4.7.6_32-43.104.1

xen-doc-html: before 4.7.6_32-43.104.1

xen-tools-domU-debuginfo: before 4.7.6_32-43.104.1

xen-debugsource: before 4.7.6_32-43.104.1

xen-libs-debuginfo-32bit: before 4.7.6_32-43.104.1

xen-tools: before 4.7.6_32-43.104.1

xen-libs-32bit: before 4.7.6_32-43.104.1

xen-libs: before 4.7.6_32-43.104.1

xen-tools-domU: before 4.7.6_32-43.104.1

xen: before 4.7.6_32-43.104.1

External links

http://www.suse.com/support/update/announcement/2023/suse-su-20230846-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU73893