Rapid7 Insight Agent, version 2.6.3 and prior, suffers from a local privilege escalation due to an uncontrolled DLL search path. Specifically, when Insight Agent 2.6.3 and prior starts, the Python interpreter attempts to load python3.dll at "C:\DLLs\python3.dll," which normally is writable by locally authenticated users. Because of this, a malicious local user could use Insight Agent's startup conditions to elevate to SYSTEM privileges. This issue was fixed in Rapid7 Insight Agent 2.6.4.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-5629
• https://bogner.sh/2019/06/local-privilege-escalation-in-rapid7s-windows-insight-idr-agent/
• https://help.rapid7.com/insightagent/release-notes/archive/2019/05/#20190529
• https://seclists.org/bugtraq/2019/Jun/0
• http://packetstormsecurity.com/files/153159/Rapid7-Windows-InsightIDR-Agent-2.6.3.14-Local-Privilege-Escalation.html
• http://seclists.org/fulldisclosure/2019/Jun/13