CVE-2020-15866 Explained : Impact and Mitigation
Learn about CVE-2020-15866, a vulnerability in mruby through 2.1.2-rc due to incorrect VM stack handling. Find out the impact, affected systems, exploitation details, and mitigation steps.
mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c due to incorrect VM stack handling.
Understanding CVE-2020-15866
What is CVE-2020-15866?
mruby through version 2.1.2-rc is vulnerable to a heap-based buffer overflow, allowing attackers to trigger the issue via the stack_copy function.
The Impact of CVE-2020-15866
This vulnerability could potentially lead to arbitrary code execution or denial of service (DoS) attacks.
Technical Details of CVE-2020-15866
Vulnerability Description
The vulnerability exists in the mrb_yield_with_class function in vm.c due to incorrect handling of the VM stack.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions up to 2.1.2-rc are affected
Exploitation Mechanism
The vulnerability can be exploited by triggering the issue through the stack_copy function.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by the vendor
- Monitor official sources for any patches or workarounds
Long-Term Security Practices
- Regularly update software and libraries to the latest versions
- Conduct security assessments and code reviews to identify vulnerabilities
Patching and Updates
It is crucial to apply the security update released by the mruby project to address the heap-based buffer overflow vulnerability.