Ubuntu update for xorg-server

Published: 2024-04-10

Risk	Low
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2024-31080 CVE-2024-31081 CVE-2024-31082 CVE-2024-31083
CWE-ID	CWE-122 CWE-416
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system xwayland (Ubuntu package) Operating systems & Components / Operating system package or component xserver-xorg-core (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU88115

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-31080

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary error within the ProcXIGetSelectedEvents() function. A local user can trigger a heap-based buffer overflow and read system memory.

Mitigation

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

Vulnerable software versions

Ubuntu: 14.04 - 23.10

xwayland (Ubuntu package): before Ubuntu Pro (Infra-only)

xserver-xorg-core (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

http://ubuntu.com/security/notices/USN-6721-2

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) Heap-based buffer overflow

EUVDB-ID: #VU88116

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-31081

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary error within the ProcXIPassiveGrabDevice() function. A local user can trigger a heap-based buffer overflow and read system memory.

Mitigation

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

Vulnerable software versions

Ubuntu: 14.04 - 23.10

xwayland (Ubuntu package): before Ubuntu Pro (Infra-only)

xserver-xorg-core (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

http://ubuntu.com/security/notices/USN-6721-2

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.

3) Heap-based buffer overflow

EUVDB-ID: #VU88117

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-31082

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary error within the ProcAppleDRICreatePixmap() function. A local user can trigger a heap-based buffer overflow and read system memory.

Note, the vulnerability affects only Xquartz server for MacOS systems.

Mitigation

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

Vulnerable software versions

Ubuntu: 14.04 - 23.10

xwayland (Ubuntu package): before Ubuntu Pro (Infra-only)

xserver-xorg-core (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

http://ubuntu.com/security/notices/USN-6721-2

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.

4) Use-after-free

EUVDB-ID: #VU88118

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-2024-31083

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 within the ProcRenderAddGlyphs() function. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 14.04 - 23.10

xwayland (Ubuntu package): before Ubuntu Pro (Infra-only)

xserver-xorg-core (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

http://ubuntu.com/security/notices/USN-6721-2

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.