Ubuntu update for xorg-server



| Updated: 2022-07-14
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-2319
CVE-2022-2320
CWE-ID CWE-787
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

xwayland-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

xserver-xorg-core-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

xserver-xorg-core (Ubuntu package)
Operating systems & Components / Operating system package or component

xwayland (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU65222

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-2319

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 within the ProcXkbSetGeometry request handler of the Xkb extension. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 16.04

xwayland-hwe-16.04 (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xserver-xorg-core-hwe-16.04 (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xserver-xorg-core (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xwayland (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5510-2


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.

2) Out-of-bounds write

EUVDB-ID: #VU65223

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-2320

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 within the ProcXkbSetDeviceInfo request handler of the Xkb extension. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 16.04

xwayland-hwe-16.04 (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xserver-xorg-core-hwe-16.04 (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xserver-xorg-core (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

xwayland (Ubuntu package): before 2:1.18.40ubuntu0.12+esm2

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5510-2


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.



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