CVE-2021-23155
Published: 18 November 2021
Summary
CVE-2021-23155 is a critical-severity Improper Following of a Certificate's Chain of Trust (CWE-296) vulnerability in Gallagher Command Centre Mobile Client. Its CVSS base score is 9.0 (Critical).
Operationally, ranked at the 31.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-10267
Vulnerability details
Improper validation of the cloud certificate chain in Mobile Client allows man-in-the-middle attack to impersonate the legitimate Command Centre Server. This issue affects: Gallagher Command Centre Mobile Client for Android 8.60 versions prior to 8.60.065; version 8.50 and prior versions.
- 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.
Mandates approved trust anchors and issuance policies, directly preventing acceptance of unvalidated or untrusted certificates.
When certificates are used to establish component provenance, the control requires correct certificate validation procedures.
Correct system time is required for proper enforcement of certificate notBefore/notAfter dates and time-based revocation checks.