A denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges. An attacker who successfully exploited the vulnerability could cause a target system to stop responding. To exploit this vulnerability, a remote unauthenticated attacker could send a specially crafted request to a target system utilizing TLS 1.2 or lower, triggering the system to automatically reboot. The update addresses the vulnerability by changing the way TLS key exchange messages are validated.
CVSS Details
- CVSS 3.1 Base Score: 8.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Msft | — | 2020-05 Cumulative Update for Microsoft Windows 10, version 1909 (KB4556799)2020-05 Cumulative Update for Microsoft Windows 10, version 1803 (KB4556807)2020-05 Cumulative Update for Microsoft Windows 10, version 1709 (KB4556812)2020-05 Cumulative Update for Microsoft Windows 10, version 1809 (KB4551853)2020-05 Cumulative Update for Microsoft Windows Server 2019, version 1809 (KB4551853)2020-05 Cumulative Update for Windows Server, version 1903 for x64-based Systems (KB4556799)2020-05 Cumulative Update for Microsoft Windows 10, version 1903 (KB4556799)2020-05 Cumulative Update for Windows Server, version 1909 for x64-based Systems (KB4556799) | Jun 9, 2020 | May 12, 2020 |
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