Ubuntu update for wayland

1) Use-after-free

EUVDB-ID: #VU67416

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3782

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error caused by incorrectly handled reference counting
certain objects. A local user can perform a denial of service (DoS) attack against the Wayland compositor or execute arbitrary code with elevated privileges.

Mitigation

Update the affected package wayland to the latest version.

Vulnerable software versions

Ubuntu: 16.04

libwayland-client0 (Ubuntu package): before 1.12.01~ubuntu16.04.3+esm1

libwayland-server0 (Ubuntu package): before 1.12.01~ubuntu16.04.3+esm1

libwayland-cursor0 (Ubuntu package): before 1.12.01~ubuntu16.04.3+esm1

libwayland-bin (Ubuntu package): before 1.12.01~ubuntu16.04.3+esm1

External links

http://ubuntu.com/security/notices/USN-5614-2

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.