CVE-2021-46543 : Security Advisory and Response

Cesanta MJS v2.20.0 has a SEGV vulnerability that can lead to a Denial of Service (DoS) attack.

Understanding CVE-2021-46543

Cesanta MJS v2.20.0 is affected by a SEGV vulnerability that could result in a DoS.

What is CVE-2021-46543?

The vulnerability in Cesanta MJS v2.20.0 allows attackers to cause a DoS by exploiting specific libraries.

The Impact of CVE-2021-46543

Exploiting this vulnerability can result in a complete denial of service within systems using the affected version.

Technical Details of CVE-2021-46543

Cesanta MJS v2.20.0 vulnerability details.

Vulnerability Description

The vulnerability resides in /lib/x86_64-linux-gnu/libc.so.6+0x18e810 of Cesanta MJS v2.20.0, leading to a DoS.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers can trigger the vulnerability through specific actions in Cesanta MJS v2.20.0.

Mitigation and Prevention

Actions to mitigate the CVE-2021-46543 vulnerability.

Immediate Steps to Take

Monitor for any abnormal system behavior.
Update Cesanta MJS to a patched version to prevent exploitation.

Long-Term Security Practices

Regularly update and patch all software components.
Implement network segmentation to limit the attack surface.

Patching and Updates

Apply the latest patch provided by Cesanta to address the vulnerability.