Security readout for executives and security teams
Plain-English summary
JerryScript 2.2.0 can crash when it encounters specific JavaScript parsing errors during out-of-memory conditions. The public record describes NULL pointer dereference and assertion failure behavior, so the practical concern is availability in products embedding JerryScript, not confirmed data theft or code execution.
Executive priority
Treat this as a targeted dependency hygiene item unless JerryScript parses attacker-controlled JavaScript in a production product. Prioritize embedded or exposed runtimes first; otherwise handle during normal maintenance.
Technical view
CVE-2020-13649 affects parser/js/js-scanner.c in JerryScript 2.2.0. Error handling during certain out-of-memory paths is mishandled, demonstrated by scanner_reverse_info_list NULL pointer dereference and scanner_scan_all assertion failure. The source bundle references upstream issues and a fixing commit.
Likely exposure
Exposure is limited to systems, firmware, or applications that embed JerryScript 2.2.0 and parse untrusted or externally supplied JavaScript. The source bundle does not identify downstream affected products or CPEs.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. Public evidence supports crash conditions under memory pressure, but does not establish remote exploitability or code execution.
Researcher notes
The record lacks CVSS, CWE, CPE, and downstream product mapping. Analysis should focus on confirming JerryScript 2.2.0 presence, whether JavaScript input is attacker-controlled, and whether the referenced upstream commit is present.
Mitigation direction
- Identify any direct or embedded JerryScript 2.2.0 usage.
- Apply the upstream fix commit or a vendor release that contains it.
- Ask device or SDK vendors whether their builds include the fix.
- Restrict untrusted JavaScript parsing where update timing is uncertain.
Validation and detection
- Check SBOMs, lockfiles, firmware manifests, and source trees for JerryScript 2.2.0.
- Confirm parser/js/js-scanner.c includes changes from commit 69f8e78c2f8d562bd6d8002b5488f1662ac30d24.
- Review crash telemetry for JerryScript scanner NULL dereferences or scanner_scan_all assertions.
- Verify vendor advisories before marking downstream products affected.
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-2020-13649 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://github.com/jerryscript-project/jerryscript/issues/3786CVE reference · x_refsource_MISC
- https://github.com/jerryscript-project/jerryscript/issues/3788CVE reference · x_refsource_MISC
- https://github.com/jerryscript-project/jerryscript/commit/69f8e78c2f8d562bd6d8002b5488f1662ac30d24CVE 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.