CVE-2019-19333

high-risk

Published 2019-12-06

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 "bits". 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.

Do I need to act?

0.74% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Fix available

Upgrade to: f6d684ade99dd37b21babaa8a856f64faa1e2e0d

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (16)

Libyang

Enterprise Linux

Affected Vendors

Redhat Cesnet

References (10)

https://access.redhat.com/errata/RHSA-2019:4360

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333

Patch https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0...

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

https://access.redhat.com/errata/RHSA-2019:4360

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19333

Patch https://github.com/CESNET/libyang/commit/f6d684ade99dd37b21babaa8a856f64faa1e2e0...

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

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high-risk

Severity 32/34 · Critical

Exploitability 2/34 · Minimal

Exposure 18/34 · Moderate