CVE-2019-20395

Published: 22 January 2020

A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.

Priority

Cvss 3 Severity Score

6.5

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/4e610ccd87a2ba9413819777d508f71163fcc237
libyang2 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Not vulnerable (2.0.112-6ubuntu2)
	kinetic	Not vulnerable (2.0.112-6ubuntu2)
	lunar	Not vulnerable (2.0.112-6ubuntu2)
	mantic	Not vulnerable (2.0.112-6ubuntu2)
	trusty	Does not exist
	upstream	Released (2.0.0)
	xenial	Does not exist
	Patches: upstream: https://github.com/CESNET/libyang/commit/99b5b2a6c0edb9cddbe619b93f2bbd231a828aee

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

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