CVE-2019-6706 Explained : Impact and Mitigation
Discover the impact of CVE-2019-6706, a use-after-free vulnerability in Lua 5.3.5, potentially leading to system crashes or arbitrary code execution. Learn mitigation steps and long-term security practices.
CVE-2019-6706 is a use-after-free vulnerability in the lua_upvaluejoin function within Lua 5.3.5. This vulnerability could potentially lead to a crash if exploited by an attacker through specific argument relationships.
Understanding CVE-2019-6706
This section provides insights into the nature and impact of the CVE-2019-6706 vulnerability.
What is CVE-2019-6706?
The CVE-2019-6706 vulnerability is a use-after-free issue in Lua 5.3.5, specifically in the lua_upvaluejoin function. When an attacker successfully triggers a debug.upvaluejoin call with specific argument relationships, it can result in a system crash.
The Impact of CVE-2019-6706
The exploitation of this vulnerability can lead to a denial of service (DoS) condition or potentially enable attackers to execute arbitrary code on the affected system, compromising its integrity and confidentiality.
Technical Details of CVE-2019-6706
This section delves into the technical aspects of the CVE-2019-6706 vulnerability.
Vulnerability Description
The use-after-free vulnerability in the lua_upvaluejoin function allows attackers to manipulate memory after it has been freed, potentially leading to system crashes or arbitrary code execution.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: Lua 5.3.5
Exploitation Mechanism
Attackers can exploit this vulnerability by invoking a debug.upvaluejoin call with specific argument relationships, triggering the use-after-free condition and potentially causing a system crash.
Mitigation and Prevention
Learn how to mitigate and prevent the CVE-2019-6706 vulnerability.
Immediate Steps to Take
- Apply security patches provided by Lua to address the use-after-free vulnerability.
- Monitor official sources for updates and advisories related to Lua security.
Long-Term Security Practices
- Regularly update Lua to the latest stable version to ensure all security patches are applied.
- Implement secure coding practices to minimize the risk of memory-related vulnerabilities.
Patching and Updates
Stay informed about security updates and patches released by Lua to address vulnerabilities like CVE-2019-6706.