Security readout for executives and security teams
Plain-English summary
This CVE describes a crash risk in Cesanta MJS 1.20.1. A specially crafted file can trigger a stack overflow in parsing logic, causing denial of service. The public record does not provide CVSS, a fixed version, or broad product impact details.
Executive priority
Treat this as a targeted availability risk, not a confirmed data compromise issue. Escalate if MJS 1.20.1 handles unauthenticated external input or supports critical services.
Technical view
CVE-2020-36367 is reported as a stack overflow in the parse_block function of Cesanta MJS 1.20.1. The stated impact is denial of service via crafted file parsing. Source data lacks CWE mapping, CVSS scoring, CPEs, and remediation detail.
Likely exposure
Exposure is most likely where Cesanta MJS 1.20.1 is embedded and used to parse files or scripts supplied by remote or untrusted users. The source bundle does not identify downstream affected products.
Exploitation context
The bundle does not cite active exploitation, public weaponization, or CISA KEV listing. The only supported exploit context is denial of service from a crafted file against vulnerable MJS parsing.
Researcher notes
The evidence base is sparse. Public CVE data names MJS 1.20.1 and parse_block, but provides no CVSS, fixed release, CWE, detailed affected CPEs, or active exploitation evidence.
Mitigation direction
- Inventory applications and firmware that embed Cesanta MJS.
- Check Cesanta guidance and issue 135 for fixed versions or workarounds.
- Reduce or block untrusted file parsing where MJS 1.20.1 is present.
- Use process isolation and restart controls around MJS parsing services.
- Prioritize remediation for internet-facing or unauthenticated file-processing paths.
Validation and detection
- Confirm whether Cesanta MJS 1.20.1 exists in source, binaries, or vendor components.
- Identify code paths that pass remote or untrusted files into MJS parsing.
- Check crash logs for parser-related stack overflow or abnormal termination.
- Verify vendor advisories before marking a patched or mitigated state.
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-2020-36367 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/cesanta/mjs/issues/135CVE 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.