CVE-2021-46556 Explained : Impact and Mitigation

Cesanta MJS v2.20.0 has a SEGV vulnerability that can result in a Denial of Service (DoS).

Understanding CVE-2021-46556

Cesanta MJS v2.20.0 has a vulnerability that can lead to a DoS attack.

What is CVE-2021-46556?

Cesanta MJS v2.20.0 is susceptible to a SEGV vulnerability through mjs_bcode_insert_offset at src/mjs_bcode.c, which can be exploited for DoS attacks.

The Impact of CVE-2021-46556

This vulnerability in Cesanta MJS v2.20.0 can be exploited to cause a Denial of Service (DoS) attack.

Technical Details of CVE-2021-46556

Cesanta MJS v2.20.0 Vulnerability

Vulnerability Description

The vulnerability is present in Cesanta MJS v2.20.0 through the mjs_bcode_insert_offset function in src/mjs_bcode.c, allowing attackers to trigger a DoS.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Version: n/a

Exploitation Mechanism

Attackers can exploit the vulnerability by leveraging the mjs_bcode_insert_offset function in Cesanta MJS v2.20.0.

Mitigation and Prevention

Steps to Secure Against CVE-2021-46556

Immediate Steps to Take

Update Cesanta MJS to a patched version or apply available fixes to mitigate the vulnerability.
Monitor for any unusual activities on the system that could indicate a DoS attack.

Long-Term Security Practices

Regularly update and patch software to protect against known vulnerabilities.
Implement network security measures to detect and prevent DoS attacks.

Patching and Updates

Stay informed about security updates for Cesanta MJS and apply patches promptly to address known vulnerabilities.