Security readout for executives and security teams
Plain-English summary
This issue can crash jsish when it processes specially crafted JavaScript. Business impact appears most tied to denial of service in systems that run or embed vulnerable jsish versions. The public data does not provide CVSS, CPEs, active exploitation evidence, or a named fixed version.
Executive priority
Treat as a targeted denial-of-service risk where jsish is used in production or automation. Priority should be moderate for exposed JavaScript-processing paths, lower where jsish is absent or only processes trusted code. Evidence is incomplete, so confirm local usage first.
Technical view
CVE-2018-1000663 is reported as a buffer overflow in jsish versions 2.4.70 and 2.047, in _jsi_evalcode within jsiEval.c. The stated outcome is a segmentation fault crash. The source says exploitation requires the victim to execute crafted JavaScript code.
Likely exposure
Exposure is likely limited to environments that install, embed, or invoke jsish and process JavaScript from users, files, automation, or other untrusted sources. The source bundle does not identify formal CPEs, downstream packages, or platform-specific exposure.
Exploitation context
No cited source states active exploitation, and the CVE is not marked KEV. The provided description says exploitation requires crafted JavaScript to be executed by the victim. Public impact evidence in the bundle is limited to crash due to segmentation fault.
Researcher notes
The record lacks CVSS, CWE, CPE, and patch metadata. Do not infer code execution from the provided sources; they only support buffer overflow and crash impact. Research should focus on confirming affected versions, reachable JavaScript evaluation paths, and vendor remediation status.
Mitigation direction
- Inventory systems and applications for jsish versions 2.4.70 and 2.047.
- Check jsish vendor guidance or the Fossil ticket for fixed-version details.
- Avoid processing untrusted JavaScript with affected jsish builds.
- Isolate jsish execution where removal or upgrade is not immediately possible.
- Monitor affected services for unexpected segmentation faults or crashes.
Validation and detection
- Confirm whether jsish is present through SBOM, package, or source dependency review.
- Verify exact jsish versions in deployed and build environments.
- Identify whether applications pass user-controlled JavaScript into jsish.
- Review crash logs for jsish segmentation faults around JavaScript evaluation.
- Track the vendor reference for remediation status and version guidance.
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-2018-1000663 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://jsish.org/fossil/jsi/tktview/c253f6d80c9018d841e857b69e7ad6436ed95cb9CVE reference · x_refsource_CONFIRM
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.