CVE-2023-38961
Published: 21 August 2023
Summary
CVE-2023-38961 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Jerryscript Jerryscript. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 7.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-38961 is a buffer overflow vulnerability in JerryScript version 3.0.0 that resides in the scanner_is_context_needed function within js-scanner-until.c. The flaw is tracked under CWE-787 and carries a CVSS 3.1 base score of 9.8, reflecting network-accessible, unauthenticated exploitation that can result in full confidentiality, integrity, and availability impact.
A remote attacker can supply crafted input that triggers the overflow, allowing arbitrary code execution on the affected JerryScript runtime without requiring user interaction or credentials.
The two reference URLs both point to the same public GitHub issue tracker entry for the project; no separate vendor advisory or patch commit details are supplied in the source data. The associated EPSS score has remained flat at 0.0837 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-42721
Vulnerability details
Buffer Overflwo vulnerability in JerryScript Project jerryscript v.3.0.0 allows a remote attacker to execute arbitrary code via the scanner_is_context_needed component in js-scanner-until.c.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.