Buffer Overflow Vulnerability in CODESYS V2 Web-Server
CVE-2021-30191

7.5HIGH

Key Information:

Vendor

Codesys

Status
V2 Web Server
Vendor
CVE Published:
25 May 2021

What is CVE-2021-30191?

The CODESYS V2 Web-Server before version 1.1.9.20 is vulnerable to a buffer overflow attack due to improper handling of input data size during a buffer copy operation. This flaw allows attackers to exploit the Web-Server functionality by sending specially crafted input that exceeds the allocated buffer size, potentially leading to unauthorized access or execution of arbitrary code.

References

https://customers.codesys.com/index.php
x_refsource_MISC
https://customers.codesys.com/index.php?eID=dumpFile&t=f&...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.