CVE-2020-14346 Integer overflow in xorg-x11-server

What is CVE-2020-14346?

CVE-2020-14346 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 15 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Weakness: CWE-191

Which versions are affected by CVE-2020-14346?

It affects 3 products.

Products include Canonical Ubuntu Linux, Redhat Enterprise Linux, X.org X Server.

How do I fix CVE-2020-14346?

Upgrade to a fixed version.

Is CVE-2020-14346 being exploited?

There is no known exploitation of CVE-2020-14346 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2020-14346, DEBIAN-CVE-2020-14346, GHSA-483f-26r4-2fvr, UBUNTU-CVE-2020-14346.