CVE-2019-20398

medium

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.

References

https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html

https://github.com/CESNET/libyang/issues/773

https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3

https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08

https://bugzilla.redhat.com/show_bug.cgi?id=1793935

Details

Source: Mitre, NVD

Published: 2020-01-22

Updated: 2023-09-19

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H