CVE-2021-43083 : Security Advisory and Response
Discover details about CVE-2021-43083 affecting Apache PLC4X 0.9.0. Learn about the impact, affected systems, exploitation mechanism, mitigation steps, and prevention measures.
Apache PLC4X - PLC4C (Only the C language implementation was affected) was vulnerable to an unsigned integer underflow flaw inside the tcp transport. Users should update to 0.9.1 to address this issue.
Understanding CVE-2021-43083
Apache PLC4X 0.9.0 Buffer overflow in PLC4C via crafted server response
What is CVE-2021-43083?
- Vulnerability in Apache PLC4X - PLC4C (C language implementation) related to an unsigned integer underflow flaw in the tcp transport.
- Users are advised to update to version 0.9.1 to fix this vulnerability.
- Exploiting the vulnerability requires active connection to a malicious device that can send a response with invalid content.
The Impact of CVE-2021-43083
- Currently considered of minimal probability for exploitation, but risk may increase with industrial networks convergence.
Technical Details of CVE-2021-43083
- Vulnerability Description:
Apache PLC4X - PLC4C had an unsigned integer underflow flaw in the tcp transport.
Affected Systems and Versions
- Product: Apache PLC4X
- Vendor: Apache Software Foundation
- Versions Affected: PLC4C version 0.9.0 and below
Exploitation Mechanism
- User must connect to a malicious device that sends an invalid response.
Mitigation and Prevention
- Immediate Steps to Take:
- Update to version 0.9.1 to fix the vulnerability.
- Long-Term Security Practices:
- Be cautious while connecting to unknown devices.
- Regular security awareness training for personnel.
- Patching and Updates:
- Stay updated with security patches and follow vendor recommendations.