#VU41865 Integer overflow in libx11 - CVE-2020-14344

Vulnerability identifier: #VU41865

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-14344

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libx11
Other software / Other software solutions

Vendor: xorg.freedesktop.org

Description

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

The vulnerability exists due to integer overflow in the X Input Method (XIM) client in libX11. A local user can run a specially crafted program, trigger integer overflow and execute arbitrary code on the system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libx11: 1.6.0 - 1.6.9

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344
https://lists.x.org/archives/xorg-announce/2020-July/003050.html
https://www.openwall.com/lists/oss-security/2020/07/31/1

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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.