CVE-2021-46538 : Security Advisory and Response

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

Understanding CVE-2021-46538

Cesanta MJS v2.20.0 is susceptible to a SEGV vulnerability via gc_compact_strings at src/mjs_gc.c.

What is CVE-2021-46538?

The vulnerability in Cesanta MJS v2.20.0 can trigger a Denial of Service (DoS) attack due to the SEGV issue.

The Impact of CVE-2021-46538

The vulnerability could allow attackers to crash the application, leading to a DoS condition.

Technical Details of CVE-2021-46538

Cesanta MJS v2.20.0 vulnerability details.

Vulnerability Description

The vulnerability occurs in Cesanta MJS v2.20.0 through gc_compact_strings at src/mjs_gc.c, allowing for a DoS exploit.

Affected Systems and Versions

Product: n/a
Version: n/a

Exploitation Mechanism

Attackers can exploit the vulnerability through crafted inputs, causing a crash and DoS.

Mitigation and Prevention

Steps to address CVE-2021-46538.

Immediate Steps to Take

Apply available patches or updates from the vendor.
Monitor for any unusual activities indicating a possible exploitation attempt.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments to identify and remediate vulnerabilities.

Patching and Updates

Ensure to keep Cesanta MJS and related components up to date to mitigate the CVE-2021-46538 vulnerability.