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CVE Record

CVE-2018-11595: Espruino before 1.99 allows attackers to cause a denial of service (application crash) and a potential Esca...

Espruino before 1.99 allows attackers to cause a denial of service (application crash) and a potential Escalation of Privileges with a user crafted input file via a Buffer Overflow during syntax parsing, because strncat is misused.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Espruino versions before 1.99 can crash while parsing a specially crafted input file. The CVE also describes potential privilege escalation from a buffer overflow. Business urgency depends on whether Espruino is embedded in products, tooling, or devices that process untrusted code or files.

Executive priority

Treat this as a targeted remediation item for any product or operational tool using Espruino. Prioritize internet-facing or user-input parsing use cases, but do not assume active exploitation from the provided evidence.

Technical view

The reported flaw is a buffer overflow during Espruino syntax parsing caused by misuse of strncat. Public references identify crafted input files and an upstream fix commit. The CVE states denial of service and potential escalation of privileges, but the bundle provides no CVSS score, CWE, or confirmed exploit-in-the-wild evidence.

Likely exposure

Exposure is likely limited to environments running Espruino before 1.99, especially embedded devices, firmware builds, development tools, or services that parse user-supplied Espruino JavaScript/input files.

Exploitation context

The source bundle shows public issue and test-file references for crafted input crashes. It does not include CISA KEV status or another cited source confirming active exploitation in the wild.

Researcher notes

Key gaps are absent CVSS, CWE mapping, and exploit maturity data. The strongest technical evidence is the upstream issue and fix commit. Avoid relying on the attached crafted files for operational testing unless handled in a controlled lab.

Mitigation direction

  • Upgrade Espruino to version 1.99 or later where feasible.
  • Review the upstream issue and fix commit before backporting.
  • Restrict processing of untrusted Espruino input files until fixed.
  • Rebuild and redeploy affected firmware or tools from corrected source.
  • Check vendor or maintainer guidance for device-specific update paths.

Validation and detection

  • Inventory products, firmware, and tools that embed Espruino.
  • Confirm deployed Espruino versions are not earlier than 1.99.
  • Check build manifests for pinned vulnerable source revisions.
  • Run non-offensive parser regression tests after updating.
  • Verify untrusted input paths are blocked or constrained.
Prepared
Confidence
medium
Sources
4

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.

ATT&CK lookup starting points

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CVE-2018-11595 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
6Source 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.