CVE-2019-19334 Memory corruption in libyang
A stack-based buffer overflow in libyang allows attackers to cause denial of service or execute code via malicious YANG files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-19334?
CVE-2019-19334 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 6 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.
Which versions are affected by CVE-2019-19334?
It affects 3 products.
Products include Cesnet Libyang, Fedoraproject Fedora, Redhat Enterprise Linux.
How do I fix CVE-2019-19334?
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-2019-19334 being exploited?
There is no known exploitation of CVE-2019-19334 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2019-19334, GHSA-936c-h6q8-79c4.