Vulnerability · Published May 21, 2020 · Assigned by microsoft
CVE-2020-1118Microsoft Windows Transport Layer Security Denial of Service Vulnerability
High 8.6
In plain English
A high-severity security flaw in Windows 10 Version 1709 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 15.2% (higher than 97% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
References
- Microsoft Windows Transport Layer Security Denial of Service Vulnerability vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1118 x_refsource_MISC, x_transferred