CVE-2021-34595

CVSS V2 Medium 5.5 CVSS V3 High 8.1

Description

A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition or local memory overwrite.

Overview

CVE ID
CVE-2021-34595

Assigner
info@cert.vde.com

Vulnerability Status
Analyzed

Published Version
2021-10-26T10:15:08

Last Modified Date
2022-10-24T16:05:55

Weakness Enumerations

CWE	URL
CWE-119	http://cwe.mitre.org/data/definitions/119.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:codesys:plcwinnt::::::::	1	OR		2.4.7.56
cpe:2.3:a:codesys:runtime_toolkit:::::::x86:*	1	OR		2.4.7.56

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
SINGLE

Confidentiality Impact
NONE

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
5.5

Severity
MEDIUM

Exploitability Score
8

Impact Score
4.9

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
8.1

Base Severity
HIGH

Exploitability Score
2.8

Impact Score
5.2

References

Reference URL	Reference Tags
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16878&token=e5644ec405590e66aefa62304cb8632df9fc9e9c&download=	Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-34595
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34595

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:48:23				Added to TrackCVE
2022-12-05 13:16:10	2021-10-26T10:15Z	2021-10-26T10:15:08	CVE Published Date	updated
2022-12-05 13:16:10		2022-10-24T16:05:55	CVE Modified Date	updated
2022-12-05 13:16:10		Analyzed	Vulnerability Status	updated