NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package libyang (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN12-LIBYANG-1551688
- published23 Jan 2020
- disclosed22 Jan 2020
Introduced: 22 Jan 2020
CVE-2019-20398 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:12.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libyang package and not the libyang package as distributed by Debian.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2019-20398
- 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://bugzilla.redhat.com/show_bug.cgi?id=1793935
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html