CVE-2019-20397

Name	CVE-2019-20397
Description	A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libyang (PTS)	buster	0.16.105-1+deb10u1	vulnerable
	bullseye, sid	1.0.225-1.1	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	(unstable)	1.0.176-1

Notes

[buster] - libyang <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1793928
https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4
https://github.com/CESNET/libyang/issues/739