| Name | CVE-2019-20398 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3572-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libyang (PTS) | bullseye | 1.0.225-1.1 | fixed |
| sid, trixie | 3.4.2+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libyang | source | experimental | 1.0.167-1 | | | |
| libyang | source | buster | 0.16.105+really1.0-0+deb10u1 | | DLA-3572-1 | |
| libyang | source | (unstable) | 1.0.176-1 | | | |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=1793935
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
https://github.com/CESNET/libyang/issues/773