CVE-2019-20395
First published: Wed Jan 22 2020(Updated: )
A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. 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 |
|---|---|---|
| redhat/libyang | <1.0 | 1.0 |
| 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 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1793924
- https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://github.com/CESNET/libyang/issues/724
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1797548
Frequently Asked Questions
What is the severity of CVE-2019-20395?
CVE-2019-20395 has a high severity level due to the potential for a stack overflow leading to application crashes.
How do I fix CVE-2019-20395?
To fix CVE-2019-20395, update libyang to version 1.0-r1 or later.
Which versions of libyang are affected by CVE-2019-20395?
CVE-2019-20395 affects libyang versions prior to 1.0-r1, including various 0.x and 0.1 versions.
What type of issue is CVE-2019-20395?
CVE-2019-20395 is a stack consumption issue that can cause crashes due to self-referential union types with leafrefs.
Who is impacted by CVE-2019-20395?
Applications that use libyang to parse untrusted YANG files are impacted by CVE-2019-20395.
- agent/author
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/severity
- agent/weakness
- agent/first-publish-date
- agent/event
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-20395
- agent/software-canonical-lookup
- agent/trending
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-api
- package-manager/redhat
- 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