Security readout for executives and security teams
Plain-English summary
CVE-2018-1000661 is a crash vulnerability in jsish 2.4.67. If a victim runs specially crafted JavaScript, jsish can hit a null pointer dereference and segfault. The provided sources say it was fixed in 2.4.69, with no evidence of known active exploitation.
Executive priority
Treat this as a targeted availability risk, not an internet-wide emergency. Prioritize remediation if jsish is used in production automation, service paths, or customer-controlled script execution.
Technical view
The issue is described as CWE-476 in Jsi_LogMsg in jsiUtils.c around line 196. The documented impact is process crash from segmentation fault. Exploitation requires execution of crafted JavaScript by the affected jsish runtime. No CVSS vector or detailed affected CPE data is provided.
Likely exposure
Exposure is likely limited to environments that embed or run jsish 2.4.67, especially where untrusted or user-controlled JavaScript can be executed.
Exploitation context
The source bundle states exploitation appears possible when the victim executes specially crafted JavaScript. CISA KEV is false, and no cited source in the bundle reports active exploitation.
Researcher notes
Evidence is sparse: the bundle provides a crash class, function location, affected version, trigger condition, and fixed version, but no CVSS, CPEs, proof of exploitation, or broader product impact data.
Mitigation direction
- Upgrade jsish deployments from 2.4.67 to 2.4.69 or later.
- Review vendor guidance and the linked jsish ticket for fix details.
- Restrict execution of untrusted JavaScript in jsish-dependent workflows.
- Add monitoring for unexpected jsish process crashes or segmentation faults.
Validation and detection
- Inventory systems and applications that include or invoke jsish.
- Confirm deployed jsish versions are not 2.4.67.
- Identify workflows where jsish executes user-supplied JavaScript.
- Check crash logs for jsish segmentation faults near JavaScript 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
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CVE-2018-1000661 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
- CVE List V5 sourceCVE List V5
- https://jsish.org/fossil/jsi/tktview/2adeb066894695b38309d92771aea11c8e0a56a8CVE 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.