CVE-2019-20398: Null Pointer Dereference
First published: Wed Jan 22 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cesnet Libyang | =0.11-r1 | |
| Cesnet Libyang | =0.11-r2 | |
| Cesnet Libyang | =0.12-r1 | |
| Cesnet Libyang | =0.12-r2 | |
| Cesnet Libyang | =0.13-r1 | |
| Cesnet Libyang | =0.13-r2 | |
| Cesnet Libyang | =0.14-r1 | |
| Cesnet Libyang | =0.15-r1 | |
| Cesnet Libyang | =0.16-r1 | |
| Cesnet Libyang | =0.16-r2 | |
| Cesnet Libyang | =0.16-r3 | |
| Cesnet Libyang | =1.0-r1 | |
| Cesnet Libyang | =1.0-r2 | |
| redhat/libyang | <1.0 | 1.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1793935
- https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
- https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
- https://github.com/CESNET/libyang/issues/773
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1797552
- collector/nvd-api
- collector/nvd-index
- agent/author
- agent/type
- agent/softwarecombine
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/weakness
- agent/severity
- agent/event
- agent/first-publish-date
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-20398
- agent/software-canonical-lookup
- agent/tags
- agent/trending
- vendor/cesnet
- canonical/cesnet libyang
- version/cesnet libyang/0.11-r1
- version/cesnet libyang/0.11-r2
- version/cesnet libyang/0.12-r1
- version/cesnet libyang/0.12-r2
- version/cesnet libyang/0.13-r1
- version/cesnet libyang/0.13-r2
- version/cesnet libyang/0.14-r1
- version/cesnet libyang/0.15-r1
- version/cesnet libyang/0.16-r1
- version/cesnet libyang/0.16-r2
- version/cesnet libyang/0.16-r3
- version/cesnet libyang/1.0-r1
- version/cesnet libyang/1.0-r2
- package-manager/redhat