Microsoft PrintNightmare
Public 0-day exploit allows domain takeover
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527A remote code execution vulnerability exists in Windows OS when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Microsoft is encouraging customers to either "Disable the Print Spooler service" or "Disable inbound remote printing through Group Policy".
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527
Background
On June 30 it was disclosed that the technical details and a proof-of-concept (PoC) exploit have been accidentally leaked for a currently unpatched vulnerability in Windows that allows remote code execution. Despite the need for authentication, the severity of the issue is critical as threat actors can use it to take over a Windows domain server to easily deploy malware across a company’s network. The issue affects Windows Print Spooler and the researchers named it PrintNightmare.
Announced
June 30: Initial details emerge -
Latest Developments
July 7 - Full patch / fix released -
July 6 - Microsoft released a security patch (found later to be a partial fix) -
July 2 - Microsoft is investigating the vulnerability and assigned a CVE to the vulnerability -
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527
| Fortinet Products Summary | Services | Version | Other Info |
|---|---|---|---|
| FortiGate | IPS | 6.0+ | FortiGuard IPS blocks the Exploit |
| FortiClient | Vulnerability | 6.2+ | Detects Vulnerable Endpoints and triggers Auto-Patching |
| FortiAnalyzer | Event Handlers & Reports | 6.2+ | Detects vulnerable endpoints and intrusion attempts against the network, covering FortiGate and FortiClient |
| FortiSIEM | Rules & Reports | 6.2+ | Detects vulnerable endpoints and intrusion attempts against the network, covering FortiGate, FortiClient and 3rd party products |
Cyber Kill Chain
FortiClient
FortiGate
Incident Response (Security Operations)
To help customers identify and protect vulnerable, FortiAnalyzer, FortiSIEM and FortiSOAR updates are available to raise alerts and escalate to incident response:
FortiAnalyzer
Event Handlers & Reports
Version Info: 6.2+
FortiSIEM
Rules & Reports
Version Info: 6.2+