CVE-2019-20396
MEDIUMCVSS 6.5/10EPSS 1.91%
Last modified
CVE-2019-20396 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.. EPSS estimates a 1.91% chance of exploitation in the next 30 days.
Description
A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Cesnet | Libyang | 0.11 | R1 |
| Cesnet | Libyang | 0.12 | R1 |
| Cesnet | Libyang | 0.13 | R1 |
| Cesnet | Libyang | 0.14 | R1 |
| Cesnet | Libyang | 0.15 | R1 |
| Cesnet | Libyang | 0.16 | R1 |
References
- https://github.com/CESNET/libyang/commit/a1f17693904ed6fecc8902c747fc50a8f20e6af8Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
- https://github.com/CESNET/libyang/issues/740Exploit, Third Party Advisory
- https://github.com/CESNET/libyang/commit/a1f17693904ed6fecc8902c747fc50a8f20e6af8Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
- https://github.com/CESNET/libyang/issues/740Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-20396?
A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.
How severe is CVE-2019-20396?
CVE-2019-20396 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.
How do I fix CVE-2019-20396?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2019-20396?
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Scan your code nowSource: NVD / NIST