VulnerabilityModified
CVE-2019-20398
Applications that use libyang to parse untrusted input yang files may crash.
MEDIUM 6.5EPSS 1.82%
Does this matter?
Lower severity and a low EPSS score (1.82%). Track it; it rarely justifies an emergency change on its own.
Description
A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.82% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- cesnet/libyang
- Source
- cve@mitre.org
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08Patch
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
- https://github.com/CESNET/libyang/issues/773Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08Patch
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
- https://github.com/CESNET/libyang/issues/773Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.