REMOTE CODE EXECUTION😱

SIGRed: Another Critical Wormable Remote Code Execution Vulnerability

Attackers often abuse Windows DNS servers to gain access to targeted networks. The recent discovery of SIGRed, a critical, wormable remote code execution (RCE) vulnerability in the Windows DNS server can probably prove to be a jackpot for threat actors.

This is not just another vulnerability

Check Point security researcher Sagi Tzaik found the vulnerability (CVE-2020-1350) that existed in the operating system's code for 17 years. The successful exploitation of such a vulnerability could have a severe impact.

• Microsoft has warned that the vulnerability (CVSS base score of 10.0) could allow an attacker to craft malicious DNS queries for Windows DNS servers (versions from 2003 to 2019), and achieve arbitrary code execution that could lead to the breach of an organizations’ entire infrastructure.
• When triggered by a malicious DNS query, the vulnerability leads to a heap-based buffer overflow, allowing the attacker to take control of the server and making it possible for them to obstruct and manipulate users' emails and network traffic, make services unaccessible, and steal users' sensitive data.
• If compromised, the attacker is also granted Domain Administrator rights. In limited scenarios, the vulnerability can be triggered remotely through browser sessions in Internet Explorer and Microsoft Edge (non-Chromium based).