Security readout for executives and security teams
Plain-English summary
CVE-2020-24187 is a reported null pointer dereference in JerryScript 2.3.0. A local attacker could crash the engine, causing denial of service. The supplied sources do not show remote code execution, data theft, a CVSS score, a named fixed version, or active exploitation.
Executive priority
Treat this as a targeted availability risk, not a confirmed breach risk. Prioritize if JerryScript 2.3.0 processes untrusted scripts in production, embedded devices, or customer-facing automation paths.
Technical view
The issue is described in ecma-helpers.c in JerryScript 2.3.0 and results in a denial-of-service crash from a null pointer dereference. The public reference names a PoC around ecma_get_lex_env_type, but the supplied evidence does not define broader affected ranges or remediation details.
Likely exposure
Exposure is most likely where JerryScript 2.3.0 is embedded or executed locally with untrusted JavaScript input. Systems not using JerryScript, or not allowing untrusted local scripts, are unlikely to be affected based on the supplied sources.
Exploitation context
A public GitHub issue and PoC repository are cited, so crash reproduction information appears public. The CVE is not listed as KEV in the supplied bundle, and no cited source confirms active exploitation.
Researcher notes
The source bundle is sparse: no CVSS, CWE, CPEs, fixed version, or vendor advisory is provided. The only stated impact is local denial of service. Avoid expanding scope beyond JerryScript 2.3.0 unless upstream evidence confirms more versions.
Mitigation direction
- Inventory products or firmware that embed JerryScript 2.3.0.
- Check JerryScript upstream guidance for a fixed version or patch.
- Restrict untrusted local JavaScript execution where JerryScript is used.
- Run JerryScript workloads with least privilege and process isolation.
- Add monitoring for repeated JerryScript crashes or service restarts.
Validation and detection
- Confirm whether JerryScript is present and identify the exact version.
- Review build manifests, SBOMs, firmware packages, and bundled third-party code.
- Check logs for JerryScript crashes consistent with null pointer dereference DoS.
- Review the upstream issue without executing public PoC material in production.
- Verify any vendor-recommended update with regression tests around script parsing and execution.
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-2020-24187 mapping review
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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
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.