VulnerabilityModified
CVE-2019-20397
Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
HIGH 8.8EPSS 2.49%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.49% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- cesnet/libyang
- Source
- cve@mitre.org
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793928Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
- https://github.com/CESNET/libyang/issues/739Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1793928Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
- https://github.com/CESNET/libyang/issues/739Third 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.