High · published May 22, 2020
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.
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/windows_10 | all versions | — |
| microsoft/windows_10 | all versions | — |
| microsoft/windows_10 | all versions | — |
| microsoft/windows_10 | all versions | — |
| microsoft/windows_10 | all versions | — |
| microsoft/windows_server_2019 | all versions | — |
| microsoft/windows_server_2019 | all versions | — |
| microsoft/windows_server_2019 | all versions | — |