Security readout for executives and security teams
Plain-English summary
CVE-2020-23323 is a reported heap buffer overflow in JerryScript 2.2.0. JerryScript is an embeddable JavaScript engine, so business urgency depends on whether your products or devices include that exact version and process untrusted script-like input. The public record does not provide severity, exploitation, or a named fix.
Executive priority
Set priority after inventory. If JerryScript 2.2.0 is embedded and parses untrusted input, treat this as a meaningful memory-safety risk. If it is absent or unreachable, business urgency is low.
Technical view
The issue is described as a heap-buffer-overflow in `re-parser.c`, specifically `re_parse_char_escape`, in JerryScript 2.2.0. The source bundle does not include CVSS, CWE, attack vector, proof of active exploitation, or remediation details. Treat reachability through JavaScript parsing paths as the key exposure question.
Likely exposure
Exposure is most likely in firmware, applications, appliances, or internal products that embed JerryScript 2.2.0. Generic enterprise servers are not exposed unless they include this engine or a bundled dependency containing it.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. The available record only confirms a heap-buffer-overflow report tied to JerryScript 2.2.0 and a GitHub issue reference.
Researcher notes
Evidence is sparse. The CVE names a specific function and version but provides no CVSS, CWE mapping, exploit status, impact details, or patch reference in the supplied bundle. Avoid broad product claims without confirming embedded JerryScript usage.
Mitigation direction
- Inventory products, firmware, and dependencies for JerryScript 2.2.0.
- Check JerryScript project guidance and the linked issue for fixed versions or patches.
- Prioritize remediation where untrusted input reaches JerryScript parsing paths.
- Restrict or sandbox any embedded JerryScript runtime until remediation is confirmed.
- Track vendor advisories for downstream products that bundle JerryScript.
Validation and detection
- Confirm the JerryScript version in SBOMs, lockfiles, vendored source, or firmware manifests.
- Identify whether external users can supply JavaScript or parser input.
- Review the linked GitHub issue and CVE record for remediation updates.
- Run vendor regression or memory-safety tests in a controlled environment.
- Verify compensating controls isolate the engine from sensitive process privileges.
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-2020-23323 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/jerryscript-project/jerryscript/issues/3871CVE 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.