SUSE update for xorg-x11-server

1) Out-of-bounds write

EUVDB-ID: #VU59045

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4008

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 SProcRenderCompositeGlyphs() function in the Render extension. A local user can send a specially crafted CompositeGlyphs 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 Linux Enterprise Server for SAP: 15

SUSE Linux Enterprise High Performance Computing: 15-ESPOS - 15-LTSS

SUSE Linux Enterprise Server: 15-LTSS

xorg-x11-server-sdk: before 1.19.6-8.33.1

xorg-x11-server-extra-debuginfo: before 1.19.6-8.33.1

xorg-x11-server-extra: before 1.19.6-8.33.1

xorg-x11-server-debugsource: before 1.19.6-8.33.1

xorg-x11-server-debuginfo: before 1.19.6-8.33.1

xorg-x11-server: before 1.19.6-8.33.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20214065-1/

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.