CVE-2018-20547 Memory corruption in n/a
An illegal memory read in libcaca's dithering function can cause a crash when processing 24bpp data, leading to denial of service.
- 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-2018-20547?
CVE-2018-20547 is a high-severity memory corruption 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 an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for 24bpp data.
Weakness: CWE-119
Which versions are affected by CVE-2018-20547?
It affects 5 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Libcaca Project Libcaca, Opensuse Leap.
How do I fix CVE-2018-20547?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-20547 being exploited?
There is no known exploitation of CVE-2018-20547 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-20547, GHSA-m74g-vjwg-c8rp, UBUNTU-CVE-2018-20547.