Security readout for executives and security teams
Plain-English summary
CVE-2018-11591 is a denial-of-service flaw in Espruino before 1.98. A specially crafted input file could make the application crash during syntax parsing. The available sources describe a stability and availability risk, not data theft or code execution.
Executive priority
Handle as routine-to-priority maintenance, depending on whether Espruino is used in production devices or automated processing. Raise priority if vulnerable systems parse files from users, partners, or other untrusted sources.
Technical view
The issue is a NULL pointer dereference during syntax parsing in Espruino before 1.98. The CVE states it was addressed by adding validation for a debug trace print statement in jsvar.c. No CVSS, CWE, or detailed affected CPE data is provided in the bundle.
Likely exposure
Exposure is most likely where Espruino before 1.98 parses untrusted or externally supplied input files. Systems using newer versions, or only parsing trusted internal code, appear less exposed based on the provided evidence.
Exploitation context
The bundle does not cite CISA KEV listing or active exploitation. Public GitHub references include the issue and fixing commit. Treat exploit status as unproven, while recognizing that a crafted input file was publicly documented.
Researcher notes
The public record is sparse: no CVSS vector, CWE mapping, CPE list, or active-exploitation claim is included. Analysis should stay focused on parser crash exposure and confirmation of the upstream validation fix.
Mitigation direction
- Upgrade Espruino to version 1.98 or later where feasible.
- Review vendor release notes and the linked fixing commit for applicability.
- Avoid parsing untrusted input files on vulnerable versions.
- Restrict access to workflows that feed files into Espruino parsing.
- Monitor vendor guidance for any additional remediation details.
Validation and detection
- Inventory systems, firmware, and tooling that embed Espruino.
- Confirm the deployed Espruino version is 1.98 or later.
- Check whether any production path parses user-supplied input files.
- Review crash logs for parser-related NULL pointer failures.
- Verify the jsvar.c validation fix is present in maintained forks.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-11591 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/espruino/Espruino/issues/1420CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/commit/b6d362f6a1f2de0b3e7604848116efb509196bf4CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/files/2015612/test.txtCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.