Security readout for executives and security teams
Plain-English summary
CVE-2019-1010169 is a denial-of-service flaw in Jsish Jsi. A crafted JavaScript input can trigger an out-of-bounds read while the engine parses code, potentially crashing the process that runs it.
Executive priority
Treat this as a focused availability risk, not a broad compromise indicator. Prioritize remediation if Jsi is internet-facing, used in automation, or processes untrusted scripts.
Technical view
The CVE identifies an out-of-bounds read in lexer_getchar in jsiLexer.c affecting Jsish Jsi 2.4.77/2.0477. The reported attack vector is executing crafted JavaScript code. The fixed version is 2.4.78.
Likely exposure
Exposure is likely limited to systems that use Jsish Jsi 2.4.77 or 2.0477, especially where JavaScript input can be supplied by users, files, plugins, or automation workflows.
Exploitation context
The source bundle does not show CISA KEV listing or evidence of active exploitation. It only states that crafted JavaScript execution can trigger denial of service.
Researcher notes
Available evidence is sparse: no CVSS, CWE, CPEs, exploit status, or detailed patch notes are included. Analysis should stay tied to the reported lexer_getchar out-of-bounds read and fixed version 2.4.78.
Mitigation direction
- Upgrade Jsish Jsi to version 2.4.78 or later.
- Check the vendor ticket for any additional guidance.
- Restrict execution of untrusted JavaScript where feasible.
- Inventory embedded or bundled copies of Jsish Jsi.
- Prioritize systems where Jsi handles external input.
Validation and detection
- Confirm whether any deployed component uses Jsish Jsi 2.4.77 or 2.0477.
- Verify upgraded builds report version 2.4.78 or later.
- Review application paths that execute user-supplied JavaScript.
- Check crash logs for parser-related denial-of-service symptoms.
- Document affected assets and remediation status.
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-2019-1010169 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/3a069014976f3422d9d96821dc555c8326c02ae3CVE 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.