CVE-2022-37962: Microsoft PowerPoint RCE Vulnerability

CVE-2022-37962 Overview

CVE-2022-37962 is a Remote Code Execution vulnerability affecting Microsoft PowerPoint across multiple versions of Microsoft Office products. This vulnerability allows an attacker to execute arbitrary code on a target system when a user opens a specially crafted PowerPoint file. The attack requires user interaction, making it a potential vector for phishing and social engineering campaigns targeting enterprise environments.

Critical Impact

Successful exploitation enables attackers to execute arbitrary code with the privileges of the current user, potentially leading to complete system compromise, data theft, or lateral movement within corporate networks.

Affected Products

• Microsoft 365 Apps (Enterprise Edition - x64 and x86)
• Microsoft Office 2013 SP1, 2016, 2019 (Windows and macOS)
• Microsoft Office Long Term Servicing Channel 2021 (Windows and macOS)

Discovery Timeline

• September 13, 2022 - CVE-2022-37962 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-37962

Vulnerability Analysis

This Remote Code Execution vulnerability in Microsoft PowerPoint stems from improper handling of certain elements within PowerPoint presentation files. When a user opens a maliciously crafted .pptx or similar PowerPoint file format, the application fails to properly validate specific content, allowing an attacker to inject and execute arbitrary code within the context of the running process.

The vulnerability requires local access, meaning an attacker must convince a user to open a malicious file either through email attachment, file sharing, or other delivery mechanisms. Once the file is opened, code execution occurs automatically without additional user interaction beyond opening the document.

Root Cause

The underlying cause of CVE-2022-37962 involves improper validation and processing of embedded content within PowerPoint files. Microsoft has classified this vulnerability without providing specific CWE categorization (NVD-CWE-noinfo), but the remote code execution nature suggests issues related to memory corruption, improper object handling, or unsafe deserialization of presentation components during file parsing.

Attack Vector

The attack vector is local, requiring an attacker to deliver a malicious PowerPoint file to the victim. Common delivery mechanisms include:

• Phishing emails with malicious PowerPoint attachments
• Compromised file sharing platforms or network shares
• Malicious downloads from attacker-controlled websites
• USB drives or other removable media in targeted attacks

The victim must actively open the malicious file for exploitation to occur. Once opened, the attacker's payload executes with the same privileges as the user running PowerPoint, which in many enterprise environments may include elevated access to sensitive resources.

The vulnerability can be exploited when a user opens a specially crafted PowerPoint file containing malicious content. The malicious file triggers improper processing within PowerPoint's parsing engine, leading to code execution. For detailed technical information, refer to the Microsoft Security Update Guide.

Detection Methods for CVE-2022-37962

Indicators of Compromise

• Suspicious PowerPoint files (.pptx, .ppt, .potx, .ppsx) received via email or downloaded from untrusted sources
• Unusual child processes spawned by POWERPNT.EXE such as cmd.exe, powershell.exe, or script interpreters
• Unexpected network connections initiated by PowerPoint processes
• Anomalous file system activity or registry modifications following PowerPoint file access

Detection Strategies

• Monitor process creation events for suspicious child processes spawned by Microsoft Office applications, particularly POWERPNT.EXE
• Implement email security scanning to detect and quarantine potentially malicious Office document attachments
• Deploy endpoint detection rules to identify unusual behavior patterns associated with document-based exploitation
• Enable Protected View in Microsoft Office to sandbox documents from untrusted sources

Monitoring Recommendations

• Configure Security Information and Event Management (SIEM) alerts for Office application anomalies
• Review endpoint telemetry for PowerPoint processes exhibiting unexpected behavior patterns
• Monitor network traffic for command-and-control communications following document access
• Audit file access logs for PowerPoint files opened from email attachments or downloads folders

How to Mitigate CVE-2022-37962

Immediate Actions Required

• Apply the latest Microsoft security updates to all affected Office installations immediately
• Enable Protected View for files originating from the Internet, email attachments, and untrusted locations
• Educate users about the risks of opening PowerPoint files from unknown or untrusted sources
• Consider implementing application whitelisting to restrict executable content within Office applications

Patch Information

Microsoft has released security updates addressing CVE-2022-37962 as part of their September 2022 Patch Tuesday release cycle. Organizations should apply the relevant patches for their installed Office versions through Windows Update, Microsoft Update, or enterprise patch management solutions such as WSUS or Configuration Manager. Detailed patch information is available from the Microsoft Security Update Guide.

Workarounds

• Enable Protected View for all Office documents to open files in a sandboxed environment by default
• Block PowerPoint file attachments at the email gateway for users who do not require PowerPoint functionality
• Implement attack surface reduction rules in Microsoft Defender to block Office applications from creating child processes
• Use Microsoft Office Application Guard to isolate potentially malicious documents in a container

# Enable Protected View via Group Policy (registry configuration)
# HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\PowerPoint\Security\ProtectedView

# Enable Protected View for Internet files
reg add "HKCU\Software\Microsoft\Office\16.0\PowerPoint\Security\ProtectedView" /v DisableInternetFilesInPV /t REG_DWORD /d 0 /f

# Enable Protected View for Outlook attachments
reg add "HKCU\Software\Microsoft\Office\16.0\PowerPoint\Security\ProtectedView" /v DisableAttachementsInPV /t REG_DWORD /d 0 /f

# Enable Protected View for files in unsafe locations
reg add "HKCU\Software\Microsoft\Office\16.0\PowerPoint\Security\ProtectedView" /v DisableUnsafeLocationsInPV /t REG_DWORD /d 0 /f