CVE-2024-20674
Published: 09 January 2024
Summary
CVE-2024-20674 is a high-severity Authentication Bypass by Primary Weakness (CWE-305) vulnerability in Microsoft Windows 10 1809. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 5.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2024-20674 is a security feature bypass vulnerability in the Windows Kerberos implementation. It carries a CVSS 3.1 base score of 8.8 with network attack vector, low complexity, no required privileges, and required user interaction, resulting in high impact to confidentiality, integrity, and availability. The weakness is tracked under CWE-305 and CWE-290.
An unauthenticated attacker can exploit the flaw remotely by inducing a user to interact with a malicious resource, thereby bypassing Kerberos security protections and potentially obtaining unauthorized access or elevated capabilities on the target system.
Microsoft’s Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20674 addresses mitigation through available updates.
The associated EPSS score has remained flat at 0.1605 since disclosure, indicating no material post-publication increase in observed exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-18389
Vulnerability details
Windows Kerberos Security Feature Bypass Vulnerability
- 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.
Reveals spoofed logon attempts through unexpected previous logon timestamps upon legitimate login.
Training specifically addresses recognizing spoofed communications and phishing that enable authentication bypass.
Requiring verifiable identity evidence at appropriate assurance levels makes it substantially harder for attackers to successfully spoof or impersonate users to obtain accounts.
Unique device authentication makes successful spoofing of device identity substantially more difficult to achieve.
Unique identification of non-organizational users reduces the feasibility of authentication bypass by spoofing.
Unique identification and authentication of services before communications makes spoofing of service identities substantially harder.
Isolated trusted path ensures the user interacts only with genuine system components, preventing spoofing of authentication interfaces or prompts.
Directly counters DNS response spoofing by requiring cryptographic origin authentication artifacts from the authoritative source.