Security readout for executives and security teams
Plain-English summary
CVE-2018-11592 is a crash bug in Espruino before version 1.98. A specially crafted input file can trigger an out-of-bounds read during syntax parsing, causing denial of service. The public record does not show active exploitation or impact beyond application crash.
Executive priority
Treat this as a targeted availability risk. Prioritize remediation for production devices or services where Espruino processes external input, especially if outages affect operations. Lower priority is reasonable for isolated lab-only use with trusted inputs.
Technical view
The issue is in Espruino syntax parsing, specifically missing height validation in libs/graphics/jswrap_graphics.c. Public sources describe an out-of-bounds read reachable through crafted input, affecting Espruino versions before 1.98. CVSS, CWE, CPE, and detailed product mappings are not provided.
Likely exposure
Exposure is most likely where Espruino before 1.98 is embedded or used to parse untrusted input files. The source bundle lists affected vendor and product as n/a, so inventory must rely on Espruino version evidence rather than CPE matching.
Exploitation context
The cited sources support denial of service through crafted input. They do not support claims of remote code execution, privilege escalation, data theft, or active exploitation. KEV status is false in the provided bundle.
Researcher notes
Evidence is limited but consistent: CVE text, GitHub issue, test artifact, and fix commit point to parser-side bounds validation in graphics code. Missing CVSS and CPE data reduce precision. Do not infer exploit maturity beyond the public crafted-file denial-of-service description.
Mitigation direction
- Upgrade Espruino deployments to version 1.98 or later where applicable.
- Review the referenced upstream commit before backporting to older maintained branches.
- Avoid parsing untrusted input files on vulnerable Espruino builds.
- Check vendor or project guidance for any platform-specific remediation notes.
Validation and detection
- Inventory devices, firmware, and packages for Espruino versions before 1.98.
- Confirm whether the upstream fix commit is present in local source builds.
- Identify workflows that parse user-supplied or externally delivered input files.
- Run regression validation only in isolated, non-production environments.
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-2018-11592 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/1421CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/files/2015630/test_0.txtCVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/commit/8a44b04b584b3d3ab1cb68fed410f7ecb165e50eCVE 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.