CVE-2018-18585 Null dereference in n/a

Medium 4.3 Published 23 Oct 2018 Updated 5 Aug 2024

A null dereference in libmspack allows attackers to cause a denial of service via specially crafted CHM files with null characters in filenames.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2018-18585?

CVE-2018-18585 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 23 Oct 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

chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).

Weakness: CWE-476

Which versions are affected by CVE-2018-18585?

It affects 8 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Kyzer Libmspack, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation and 2 more.

How do I fix CVE-2018-18585?

Upgrade to a fixed version.

Is CVE-2018-18585 being exploited?

There is no known exploitation of CVE-2018-18585 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2018-18585, DEBIAN-CVE-2018-18585, GHSA-wfp6-c53g-9x25, UBUNTU-CVE-2018-18585.