CVE-2020-27819 Null dereference in libxls
A remote attacker can cause a denial of service by providing a crafted XLS file to applications using the libxls library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-27819?
CVE-2020-27819 is a medium-severity vulnerability in libxls, published on 23 Feb 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.
Weakness: CWE-476
Which versions are affected by CVE-2020-27819?
It affects 1 product.
Linux distribution packages (1)
libxls openSUSE:Leap 15.2 | All versions | 1.6.2-lp152.2.3.1 |
Products include Libxls Project Libxls.
How do I fix CVE-2020-27819?
Upgrade to a fixed version.
Is CVE-2020-27819 being exploited?
There is no known exploitation of CVE-2020-27819 in the wild and no public exploit code.
Other vulnerabilities in libxls
Sources
Also known as GHSA-fp3r-w9w2-jg2f, JLSEC-2026-1294, UBUNTU-CVE-2020-27819, openSUSE-SU-2021:0812-1, openSUSE-SU-2024:11015-1.