CVE-2023-5554
Published: 12 October 2023
Summary
CVE-2023-5554 is a medium-severity Improper Certificate Validation (CWE-295) vulnerability in Linecorp Line. Its CVSS base score is 4.8 (Medium).
Operationally, ranked at the 33.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-57854
Vulnerability details
Lack of TLS certificate verification in log transmission of a financial module within LINE Client for iOS prior to 13.16.0.
- 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.
When certificates are used to establish component provenance, the control requires correct certificate validation procedures.
Mandates approved trust anchors and issuance policies, directly preventing acceptance of unvalidated or untrusted certificates.
Correct system time is required for proper enforcement of certificate notBefore/notAfter dates and time-based revocation checks.