CVE-2021-34595: CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service
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.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2021-34595.
What is the severity rating of CVE-2021-34595?
The severity rating of CVE-2021-34595 is 8.1 (High).
What is the affected software for CVE-2021-34595?
The affected software for CVE-2021-34595 include CODESYS PLCWinNT (up to version 2.4.7.56) and Codesys Runtime Toolkit (up to version 2.4.7.56).
What can happen if a crafted request with invalid offsets is sent to the affected software?
A crafted request with invalid offsets may cause an out-of-bounds read or write access, resulting in a denial-of-service condition or local memory overwrite.
Is there a fix available for CVE-2021-34595?
Yes, updating CODESYS PLCWinNT and Codesys Runtime Toolkit to version 2.4.7.56 or later can fix the vulnerability.