Actively exploited · Published Jan 14, 2020 · Assigned by microsoft
CVE-2020-0646
Critical 9.8 Exploited
In plain English
A critical-severity security flaw in Microsoft .NET Framework 3.0 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 99.2% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by May 3, 2022.
Official description
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Affected products (as reported)
Weakness: CWE-91 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646 x_refsource_MISC
- http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646 government-resource