CVE-2021-46518 : Security Advisory and Response
Learn about CVE-2021-46518 affecting Cesanta MJS v2.20.0. This vulnerability allows attackers to execute arbitrary code or trigger a DoS. Find mitigation steps here.
Cesanta MJS v2.20.0 has been found to have a heap buffer overflow vulnerability via mjs_disown at src/mjs_core.c.
Understanding CVE-2021-46518
What is CVE-2021-46518?
Cesanta MJS v2.20.0 is affected by a heap buffer overflow vulnerability in the mjs_disown function located at src/mjs_core.c.
The Impact of CVE-2021-46518
This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service (DoS) condition.
Technical Details of CVE-2021-46518
Vulnerability Description
The vulnerability in Cesanta MJS v2.20.0 arises due to a heap buffer overflow via the mjs_disown function.
Affected Systems and Versions
- Product: Cesanta MJS v2.20.0
- Vendor: Cesanta
- Version: N/A
Exploitation Mechanism
The vulnerability can be exploited by triggering the heap buffer overflow through crafted input data.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by Cesanta.
- Monitor for any unusual activities on the system.
Long-Term Security Practices
- Regularly update software and apply patches.
- Implement secure coding practices to prevent buffer overflows.
Patching and Updates
Ensure that Cesanta MJS is updated to a version that includes a fix for the heap buffer overflow vulnerability.