CVE-2019-20391 Memory corruption in n/a
An invalid memory access in libyang allows attackers to crash applications parsing untrusted YANG files via crafted if-feature statements.
- 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-2019-20391?
CVE-2019-20391 is a medium-severity memory corruption vulnerability in n/a, published on 22 Jan 2020. 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 invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.
Weakness: CWE-119
Which versions are affected by CVE-2019-20391?
It affects 1 product.
Products include Cesnet Libyang.
How do I fix CVE-2019-20391?
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-2019-20391 being exploited?
There is no known exploitation of CVE-2019-20391 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2019-20391, GHSA-57jg-xr2w-54jg, UBUNTU-CVE-2019-20391.