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CVE-2019-20393 Details
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. 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.
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CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1793930 | CVE | Issue TrackingPatchThird Party Advisory |
| https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed | CVE | PatchThird Party Advisory |
| https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 | CVE | Third Party Advisory |
| https://github.com/CESNET/libyang/issues/742 | CVE | ExploitThird Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html | CVE | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1793930 | [email protected] | Issue TrackingPatchThird Party Advisory |
| https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed | [email protected] | PatchThird Party Advisory |
| https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 | [email protected] | Third Party Advisory |
| https://github.com/CESNET/libyang/issues/742 | [email protected] | ExploitThird Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-415 | Double Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cesnet libyang | 0.11 r1 0.11 r2 0.12 r1 0.12 r2 0.13 r1 0.13 r2 0.14 r1 0.15 r1 0.16 r1 0.16 r2 0.16 r3 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Sep 19, 2023 | CVE Modified | [email protected] |
| Jan 23, 2020 | Initial Analysis | [email protected] |