CVE-2020-36429 : Exploit Details and Defense Strategies
Learn about CVE-2020-36429, a vulnerability in open62541 version 1.x before 1.0.4 allowing an out-of-bounds write for large recursion depths. Find mitigation steps and impact details here.
Variant_encodeJson in open62541 1.x before 1.0.4 has an out-of-bounds write for a large recursion depth.
Understanding CVE-2020-36429
This CVE involves a vulnerability in open62541 version 1.x before 1.0.4 that allows an out-of-bounds write for a large recursion depth.
What is CVE-2020-36429?
The CVE-2020-36429 vulnerability is related to the Variant_encodeJson function in open62541, where a specific condition can trigger an out-of-bounds write when handling large recursion depths.
The Impact of CVE-2020-36429
This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service (DoS) on systems running the affected versions of open62541.
Technical Details of CVE-2020-36429
The technical details of CVE-2020-36429 provide insights into the vulnerability and its implications.
Vulnerability Description
The vulnerability in Variant_encodeJson in open62541 1.x before 1.0.4 allows for an out-of-bounds write operation when encountering a large recursion depth during execution.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: All versions of open62541 1.x before 1.0.4
Exploitation Mechanism
The vulnerability can be exploited by crafting a specific input that triggers a deep recursion in the Variant_encodeJson function, leading to the out-of-bounds write.
Mitigation and Prevention
Mitigation strategies and preventive measures are crucial to address CVE-2020-36429.
Immediate Steps to Take
- Update to version 1.0.4 or later of open62541 to mitigate the vulnerability.
- Monitor for any unusual activity on the network that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions to patch known vulnerabilities.
- Implement secure coding practices to prevent buffer overflows and other memory-related vulnerabilities.
Patching and Updates
- Apply patches and updates provided by the open62541 project to ensure the security of the software.