All Research
Patch Tuesday: Remote Code Execution Buffet
r00t |
microsoft patch-tuesday rce vulnerability
Microsoft’s Patch Tuesday release included 128 patches addressing critical remote code execution vulnerabilities across multiple protocols. The most severe issues affect RPC, SMB, NFS, LDAP, and Hyper-V systems.
Critical Vulnerabilities
| CVE | Protocol | CVSS | Notes |
|---|---|---|---|
| CVE-2022-26809 | RPC | 9.8 | Worm-like propagation risk (similar to Blaster) |
| CVE-2022-24491 | NFS | 9.8 | Critical RCE |
| CVE-2022-24497 | NFS | 9.8 | Critical RCE |
| CVE-2022-24541 | SMB | 8.8 | Remote code execution |
| CVE-2022-24500 | SMB | 8.8 | Remote code execution |
| CVE-2022-23257 | Hyper-V | 8.6 | VM escape potential |
| CVE-2022-26919 | LDAP | 8.1 | Directory services attack |
| CVE-2022-24537 | Hyper-V | 7.7 | Guest-to-host escape |
| CVE-2022-22008 | Hyper-V | 7.7 | Guest-to-host escape |
Historical Context
The RPC vulnerability (CVE-2022-26809) poses worm-like propagation risk similar to the Blaster worm, which affected millions of systems and caused approximately $320 million in damages. WannaCry (2017) affected more than 200,000 computers across 150 countries with damages in the billions.
Important Elevation of Privilege Issues
- CVE-2022-24521 (CVSS 7.8) - Windows Common Log File System Driver
- CVE-2022-26904 (CVSS 7.0) - Windows User Profile Service (Public Metasploit exploit available)
Key Recommendations
- Apply patches immediately
- Audit firewall rules to restrict TCP/UDP ports 135, 139, and 445
- Implement SIEM alerts for malicious activity monitoring
- Prevent exposure of port 445 to the internet