CVE-2020-6839 : Exploit Details and Defense Strategies
Learn about CVE-2020-6839, a vulnerability in mruby 2.1.0 that allows for a stack-based buffer overflow. Find out the impact, affected systems, exploitation details, and mitigation steps.
In mruby 2.1.0, a stack-based buffer overflow vulnerability exists in mrb_str_len_to_dbl in string.c.
Understanding CVE-2020-6839
What is CVE-2020-6839?
This CVE refers to a specific vulnerability in mruby 2.1.0 that allows for a stack-based buffer overflow in the mrb_str_len_to_dbl function within string.c.
The Impact of CVE-2020-6839
The vulnerability could potentially be exploited by an attacker to execute arbitrary code or crash the application.
Technical Details of CVE-2020-6839
Vulnerability Description
A stack-based buffer overflow exists in the mrb_str_len_to_dbl function in string.c in mruby 2.1.0.
Affected Systems and Versions
- Affected Version: mruby 2.1.0
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious input that triggers the buffer overflow, potentially leading to arbitrary code execution.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by the vendor to address the vulnerability.
- Monitor security advisories for any updates related to CVE-2020-6839.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions to mitigate known vulnerabilities.
- Implement secure coding practices to prevent buffer overflows and other common security issues.
Patching and Updates
Ensure that all systems running mruby 2.1.0 are updated with the latest patches and security fixes.