CVE-2018-20533 Null dereference in n/a

What is CVE-2018-20533?

CVE-2018-20533 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 28 Dec 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2018-20533?

It affects 2 products.

Products include Canonical Ubuntu Linux, Opensuse Libsolv.

How do I fix CVE-2018-20533?

Upgrade to a fixed version.

Is CVE-2018-20533 being exploited?

There is no known exploitation of CVE-2018-20533 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 DEBIAN-CVE-2018-20533, GHSA-92g5-g77x-q2f8, UBUNTU-CVE-2018-20533.