CVE-2018-20450 Use after free in n/a
Attackers can cause a denial of service via a crafted file due to a double free vulnerability in the libxls library.
- 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-2018-20450?
CVE-2018-20450 is a medium-severity use after free vulnerability in n/a, published on 25 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
The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.
Weakness: CWE-415
Which versions are affected by CVE-2018-20450?
It affects 1 product.
Products include Libxls Project Libxls.
How do I fix CVE-2018-20450?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2018-20450 being exploited?
There is no known exploitation of CVE-2018-20450 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-20450, GHSA-r369-mhv6-47fj, UBUNTU-CVE-2018-20450.