CVE-2018-14598 Null dereference in n/a

What is CVE-2018-14598?

CVE-2018-14598 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 24 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).

Weakness: CWE-20

Which versions are affected by CVE-2018-14598?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, X.org Libx11.

How do I fix CVE-2018-14598?

Apply the vendor's patch.

Is CVE-2018-14598 being exploited?

There is no known exploitation of CVE-2018-14598 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-2018-14598, DEBIAN-CVE-2018-14598, GHSA-8crp-qc6q-x3mh, UBUNTU-CVE-2018-14598.