Security readout for executives and security teams
Plain-English summary
CVE-2018-11593 is a memory-safety flaw in Espruino before 1.99. A specially crafted input file can crash the application and may expose information during syntax parsing. Business impact is most relevant where Espruino processes untrusted scripts or files.
Executive priority
Treat as targeted remediation for exposed Espruino deployments, not a broad emergency. Prioritize internet-facing, user-scriptable, or file-processing use cases first.
Technical view
The CVE describes a buffer overflow in Espruino's syntax parser, caused by misuse of strncpy in jslex.c. Public references include a GitHub issue, a crafted input attachment, and a fixing commit. No CVSS score, CWE, CPE, or detailed affected product list is provided in the bundle.
Likely exposure
Exposure is likely limited to environments running Espruino before 1.99, especially embedded or application contexts that parse user-controlled input files or scripts.
Exploitation context
The source bundle supports denial of service and potential information disclosure via crafted input. It does not show active exploitation, and the CVE is not listed as KEV.
Researcher notes
Evidence is concise but source-grounded: the CVE identifies the vulnerable version range and root cause, while GitHub references provide issue and commit context. Missing CVSS, CWE, CPE, and exploit-status detail reduce precision.
Mitigation direction
- Upgrade Espruino to version 1.99 or later where feasible.
- Apply the referenced upstream fix if maintaining a custom Espruino build.
- Avoid parsing untrusted input files with vulnerable Espruino versions.
- Check vendor or project guidance for supported remediation details.
Validation and detection
- Inventory systems, firmware, and applications that include Espruino.
- Confirm whether any deployed version is earlier than 1.99.
- Review whether Espruino parses user-supplied files or scripts.
- Verify jslex.c includes the upstream fix in custom builds.
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-2018-11593 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/files/2019228/eh_0.txtCVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/issues/1426CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/commit/bed844f109b6c222816740555068de2e101e8018CVE 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.