CVE-2019-20394

Published: 22 January 2020

A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. 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.

Priority

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
libyang Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Ignored (end of life)
	focal	Needed
	groovy	Ignored (end of life)
	hirsute	Ignored (end of life)
	impish	Not vulnerable (1.0.176-1)
	jammy	Not vulnerable (1.0.176-1)
	kinetic	Not vulnerable (1.0.176-1)
	lunar	Does not exist
	mantic	Does not exist
	trusty	Does not exist
	upstream	Released (1.0.176-1)
	xenial	Does not exist
	Patches: upstream: https://github.com/CESNET/libyang/commit/6cc51b1757dfbb7cff92de074ada65e8523289a6

Severity score breakdown

Parameter	Value
Base score	8.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

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