CVE-2019-20392: Buffer Overflow
First published: Wed Jan 22 2020(Updated: )
An invalid memory access flaw is present in libyang before v1.0-r1 in the function resolve_feature_value() when an if-feature statement is used inside a list key node, and the feature used is not defined. 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=1793922
- https://github.com/CESNET/libyang/commit/32fb4993bc8bb49e93e84016af3c10ea53964be5
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://github.com/CESNET/libyang/issues/723
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
- https://access.redhat.com/errata/RHEA-2021:1906
Frequently Asked Questions
What is the severity of CVE-2019-20392?
CVE-2019-20392 has been classified as a high severity vulnerability due to the potential for application crashes caused by invalid memory access.
How do I fix CVE-2019-20392?
To fix CVE-2019-20392, upgrade to libyang version 1.0-r1 or later.
Which versions of libyang are affected by CVE-2019-20392?
CVE-2019-20392 affects libyang versions below 1.0-r1 as well as earlier versions like 0.11-r1 through 0.16-r3.
What happens if I don't address CVE-2019-20392?
Failing to address CVE-2019-20392 may result in application crashes when parsing untrusted YANG files.
What is libyang in relation to CVE-2019-20392?
Libyang is a YANG data modeling library that is vulnerable in certain versions, specifically due to an invalid memory access issue noted in CVE-2019-20392.
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- 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