SIGRed

SIGRed[1] (CVE-2020-1350) is a security vulnerability discovered in Microsoft's Domain Name System (DNS) implementation of Windows Server versions from 2003 to 2019.

To exploit the vulnerability, an unauthenticated attacker sends malicious requests to a Windows DNS server.[2] If exploited, the vulnerability could allow an attacker to run arbitrary code on a Domain Controller in the context of the Local System Account.

In Microsoft's advisory of the issue, the vulnerability was classified 'wormable' and was given a CVSS base score of 10.0.[3]

It has been the subject of a Department of Homeland Security emergency directive, instructing all government agencies to deploy patches or mitigations for it in 24 hours.[4]

The vulnerability was discovered by Check Point Software Technologies and publicly disclosed on July 14, 2020.[1]

## References

1. ↑ 1.0 1.1 "SIGRed - Resolving Your Way into Domain Admin: Exploiting a 17 Year-old Bug in Windows DNS Servers". July 14, 2020. https://research.checkpoint.com/2020/resolving-your-way-into-domain-admin-exploiting-a-17-year-old-bug-in-windows-dns-servers/.
2. ↑ "Emergency Directive 20-03: Mitigate Windows DNS Server Remote Code Execution Vulnerability from July 2020 Patch". U.S. Department of Homeland Security. 2020-07-16. https://cyber.dhs.gov/assets/report/ed-20-03.pdf.
3. ↑ "July 2020 Security Update: CVE-2020-1350 Vulnerability in Windows Domain Name System (DNS) Server" (in en-US). https://msrc-blog.microsoft.com/2020/07/14/july-2020-security-update-cve-2020-1350-vulnerability-in-windows-domain-name-system-dns-server/.
4. ↑ "cyber.dhs.gov - Emergency Directive 20-03". 16 July 2020. https://cyber.dhs.gov/ed/20-03/.

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