SUSE update for the Linux Kernel (Live Patch 37 for SLE 12 SP3)

Published: 2021-06-18

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-32399 CVE-2021-33034
CWE-ID	CWE-362 CWE-416
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	SUSE Linux Enterprise Server for SAP Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system kgraft-patch-4_4_180-94_141-default-debuginfo Operating systems & Components / Operating system package or component kgraft-patch-4_4_180-94_141-default Operating systems & Components / Operating system package or component kgraft-patch-4_4_180-94_138-default-debuginfo Operating systems & Components / Operating system package or component kgraft-patch-4_4_180-94_138-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Race condition

EUVDB-ID: #VU55257

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32399

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition for removal of the HCI controller within net/bluetooth/hci_request.c in the Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel (Live Patch 37 for SLE 12 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP: 12-SP3

SUSE Linux Enterprise Server: 12-SP3-LTSS

kgraft-patch-4_4_180-94_141-default-debuginfo: before 5-2.2

kgraft-patch-4_4_180-94_141-default: before 5-2.2

kgraft-patch-4_4_180-94_138-default-debuginfo: before 6-2.2

kgraft-patch-4_4_180-94_138-default: before 6-2.2

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20212042-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free

EUVDB-ID: #VU54454