CVE-2021-30191 : CODESYS V2 Web-Server before 1.1.9.20 has a a Buffer Copy without Checking the S

CODESYS V2 Web-Server before 1.1.9.20 has a a Buffer Copy without Checking the Size of the Input.

Published 2021-05-25 13:15:18

Updated 2021-05-26 12:25:09

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Products affected by CVE-2021-30191

Codesys » V2 Web Server
Versions before (<) 1.1.9.20
cpe:2.3:a:codesys:v2_web_server:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.12%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 45 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Assigned by: nvd@nist.gov (Primary)

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