CVE-2019-5020 Denial of service in Yara Object
An attacker can cause a denial of service in Yara by providing a specially crafted binary file that triggers an assertion failure during object lookup.
- 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-2019-5020?
CVE-2019-5020 is a medium-severity denial of service vulnerability in Yara Object, published on 31 Jul 2019. 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
An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A specially crafted binary file can cause a negative value to be read to satisfy an assert, resulting in Denial of Service. An attacker can create a malicious binary to trigger this vulnerability.
Which versions are affected by CVE-2019-5020?
It affects 1 product.
Products include Virustotal Yara.
How do I fix CVE-2019-5020?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-5020 being exploited?
There is no known exploitation of CVE-2019-5020 in the wild and no public exploit code.
Other vulnerabilities in Yara Object
Sources
Also known as DEBIAN-CVE-2019-5020, GHSA-6r2m-f9j9-h374.