The vulnerability was used in Operation Iron Tiger, a cyber espionage campaign carried out by Chinese hackers on United States Defense Contractors.
Vulnerable component: Windows
CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to improper security restrictions on security tokens in the Microsoft Distributed Transaction Coordinator (MSDTC) service. By sending a specially crafted request to the MSDTC service, an attacker can access privileged security tokens and execute code with privileges of SYSTEM account.
Successful exploitation of the vulnerability results in privilege escalation allowing to execute arbitrary code and take complete control of an affected system.
Note: this vulnerability was being actively exploited.
Known APT campaigns:
Operation Iron Tiger
The operation was performed by Chinese group, called Emissary Panda or Threat Group-3390 (TG-3390).Hackers targeted US defense contractors and companies.