CVE-2021-28906

CVSS V2 Medium 5 CVSS V3 High 7.5

Description

In function read_yin_leaf() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. In some cases, it can be NULL, which leads to the operation of retval->ext[r]->flags that results in a crash.

Overview

CVE ID
CVE-2021-28906

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2021-05-20T19:15:07

Last Modified Date
2022-04-06T17:35:28

Weakness Enumerations

CWE	URL
CWE-252	http://cwe.mitre.org/data/definitions/252.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:cesnet:libyang::::::::	1	OR		1.0.225

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
PARTIAL

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://github.com/CESNET/libyang/issues/1455	Exploit Issue Tracking Patch Third Party Advisory
https://security.gentoo.org/glsa/202107-54	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-28906
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28906

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:29:28				Added to TrackCVE
2022-12-05 02:43:28	2021-05-20T19:15Z	2021-05-20T19:15:07	CVE Published Date	updated
2022-12-05 02:43:28		2022-04-06T17:35:28	CVE Modified Date	updated
2022-12-05 02:43:28		Analyzed	Vulnerability Status	updated