CVE-2024-45750
Published: 25 September 2024
Summary
CVE-2024-45750 is a high-severity Improper Authentication (CWE-287) vulnerability in Thegreenbow (inferred from references). Its CVSS base score is 7.3 (High).
Operationally, ranked in the top 7.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
TheGreenBow VPN clients are affected by an improper authentication vulnerability (CWE-287) tracked as CVE-2024-45750. Impacted versions include Windows Standard VPN Client 6.87.108 and earlier, Windows Enterprise VPN Client 6.87.109 and earlier plus 7.5.007 and earlier, Android VPN Client 6.4.5 and earlier, VPN Client Linux 3.4 and earlier, and VPN Client MacOS 2.4.10 and earlier. The flaw resides in the IKEv2 authentication phase, where the client accepts malformed ECDSA signatures and proceeds to establish the tunnel.
A remote attacker can exploit the issue over the network without credentials or user interaction by supplying a crafted ECDSA signature during IKEv2 negotiation. Successful exploitation grants the ability to execute arbitrary code in the context of the VPN client and forces tunnel establishment, resulting in partial impacts to confidentiality, integrity, and availability as reflected in the CVSS 7.3 score.
The vendor has published details on its security alerts page at thegreenbow.com. Administrators should review the advisory for available updates or configuration guidance and apply patches once released for the affected product lines. The associated EPSS score has remained flat at 0.0866 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-41580
Vulnerability details
An issue in TheGreenBow Windows Standard VPN Client 6.87.108 (and older), Windows Enterprise VPN Client 6.87.109 (and older), Windows Enterprise VPN Client 7.5.007 (and older), Android VPN Client 6.4.5 (and older) VPN Client Linux 3.4 (and older), VPN Client MacOS…
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2.4.10 (and older) allows a remote attacker to execute arbitrary code via the IKEv2 Authentication phase, it accepts malformed ECDSA signatures and establishes the tunnel.
- 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.
Detects unauthorized successful logons resulting from improper authentication implementations.
Documented procedures ensure personnel are trained on authentication mechanisms, tangibly lowering the risk of improper authentication being exploited.
Security awareness training instructs users on secure authentication practices and avoiding credential compromise.
Training on authentication mechanisms and best practices decreases the occurrence of improper authentication.
Non-repudiation requires strong authentication mechanisms to irrefutably attribute performed actions to specific individuals or processes.
Session content review can reveal authentication bypasses or failures in session establishment.
Review of authentication-related audit records can detect improper authentication mechanisms or bypasses.
Assessments check authentication mechanisms for correct implementation and effectiveness, reducing successful authentication bypass attempts.