CVE-2019-20394
Last modified
CVE-2019-20394 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. 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.. EPSS estimates a 2.79% chance of exploitation in the next 30 days.
Description
A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. 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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 |
| Cesnet | Libyang | 1.0 | R1 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1793932Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/6cc51b1757dfbb7cff92de074ada65e8523289a6Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
- https://github.com/CESNET/libyang/issues/769Exploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1793932Issue Tracking, Patch, Third Party Advisory
- https://github.com/CESNET/libyang/commit/6cc51b1757dfbb7cff92de074ada65e8523289a6Patch, Third Party Advisory
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
- https://github.com/CESNET/libyang/issues/769Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
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