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CVE Record

CVE-2020-36372: Stack overflow vulnerability in parse_plus_minus Cesanta MJS 1.20.1, allows remote attackers to cause a Den...

Stack overflow vulnerability in parse_plus_minus Cesanta MJS 1.20.1, allows remote attackers to cause a Denial of Service (DoS) via a crafted file.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a denial-of-service issue in Cesanta MJS 1.20.1. If a system lets an attacker provide a file parsed by MJS, the process may crash from stack overflow. Sources do not establish code execution, data theft, active exploitation, or fixed versions.

Executive priority

Treat as a focused availability risk. Prioritize if MJS parses external files in production, customer-facing, embedded, or safety-relevant systems.

Technical view

CVE-2020-36372 describes a stack overflow in the parse_plus_minus function of Cesanta MJS 1.20.1, triggered by a crafted file. The public bundle provides no CVSS score, CWE, CPE, patch version, or detailed affected-product matrix.

Likely exposure

Exposure is most likely in products or services embedding Cesanta MJS 1.20.1 and parsing untrusted or externally supplied files. Evidence is insufficient to name downstream products.

Exploitation context

The CVE record says remote attackers can cause denial of service via a crafted file. CISA KEV status is false, and the provided sources do not show active exploitation.

Researcher notes

The record is sparse. Analysis should avoid assumptions about exploit maturity, downstream affected products, or remediation status until vendor issue details or project commits are reviewed.

Mitigation direction

  • Identify whether Cesanta MJS 1.20.1 is used directly or embedded.
  • Check Cesanta MJS project guidance for fixed versions or recommended workarounds.
  • Limit parsing of untrusted files where MJS is present.
  • Run MJS-dependent services with restart and resource isolation controls.

Validation and detection

  • Inventory dependencies, firmware, and bundled libraries for Cesanta MJS.
  • Confirm exact MJS version in source, package metadata, or build artifacts.
  • Review whether attacker-controlled files reach the MJS parser.
  • Verify monitoring catches crashes or restarts in affected services.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2020-36372 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.