SUSE update for xorg-x11-server

Published: 2021-12-20

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-4009 CVE-2021-4011
CWE-ID	CWE-787
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	SUSE OpenStack Cloud Crowbar Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE OpenStack Cloud Operating systems & Components / Operating system xorg-x11-server-extra-debuginfo Operating systems & Components / Operating system package or component xorg-x11-server-extra Operating systems & Components / Operating system package or component xorg-x11-server-debugsource Operating systems & Components / Operating system package or component xorg-x11-server-debuginfo Operating systems & Components / Operating system package or component xorg-x11-server Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU59046

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-4009

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in the ProcXFixesCreatePointerBarrier() function in the XFixes extension. A local user can send a specially crafted CreatePointerBarrier request, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package xorg-x11-server to the latest version.

Vulnerable software versions

SUSE OpenStack Cloud Crowbar: 9

SUSE Linux Enterprise Server for SAP: 12-SP4

SUSE Linux Enterprise Server: 12-SP4-LTSS

SUSE OpenStack Cloud: 9

xorg-x11-server-extra-debuginfo: before 1.19.6-4.28.1

xorg-x11-server-extra: before 1.19.6-4.28.1

xorg-x11-server-debugsource: before 1.19.6-4.28.1

xorg-x11-server-debuginfo: before 1.19.6-4.28.1

xorg-x11-server: before 1.19.6-4.28.1

CPE2.3

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20214120-1/

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) Out-of-bounds write

EUVDB-ID: #VU59048