CVE-2019-20396

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.

Un error de segmentación está presente en yyparse en libyang versiones anteriores a v1.0-r1, debido a un valor de sentencia pattern malformado durante el análisis de lys_parse_path.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-22 CVE Reserved
2020-01-22 CVE Published
2023-09-20 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (4)

URL	Tag	Source
https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html	Mailing List

URL	Date	SRC
https://github.com/CESNET/libyang/issues/740	2024-08-05

URL	Date	SRC
https://github.com/CESNET/libyang/commit/a1f17693904ed6fecc8902c747fc50a8f20e6af8	2023-09-19

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.11 Search vendor "Cesnet" for product "Libyang" and version "0.11"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.11 Search vendor "Cesnet" for product "Libyang" and version "0.11"		r2		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.12 Search vendor "Cesnet" for product "Libyang" and version "0.12"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.12 Search vendor "Cesnet" for product "Libyang" and version "0.12"		r2		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.13 Search vendor "Cesnet" for product "Libyang" and version "0.13"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.13 Search vendor "Cesnet" for product "Libyang" and version "0.13"		r2		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.14 Search vendor "Cesnet" for product "Libyang" and version "0.14"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.15 Search vendor "Cesnet" for product "Libyang" and version "0.15"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.16 Search vendor "Cesnet" for product "Libyang" and version "0.16"		r1		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.16 Search vendor "Cesnet" for product "Libyang" and version "0.16"		r2		Affected
Cesnet Search vendor "Cesnet"		Libyang Search vendor "Cesnet" for product "Libyang"				0.16 Search vendor "Cesnet" for product "Libyang" and version "0.16"		r3		Affected