CVE-2025-1413
Remediation/Mitigation Strategy: CVE-2025-1413 - DaVinci Resolve MacOS File Permissions Vulnerability
This document outlines the remediation and mitigation strategy for CVE-2025-1413, a file permissions vulnerability found in DaVinci Resolve on MacOS.
1. Vulnerability Description:
- CVE ID: CVE-2025-1413
- Description: DaVinci Resolve installations on MacOS were discovered with overly permissive file permissions (
rwxrwxrwx- 777) on the application directory. Standard macOS security practices dictate application directories should have more restrictive permissions (drwxr-xr-x- 755). This deviation from best practices allows for Dylib Hijacking. - Affected Software: DaVinci Resolve on MacOS versions prior to 19.1.3.
- Location: The vulnerability lies within the permissions settings of the DaVinci Resolve application directory itself (e.g.,
/Applications/DaVinci Resolve/).
2. Severity Assessment:
- CVSS Score: 9.2 (Based on the provided data)
- Severity: Critical
- Impact: Privilege escalation. The overly permissive file permissions allow malicious actors (including guest accounts, other users on the system, or even other applications) to potentially inject malicious dynamic libraries (Dylibs) into DaVinci Resolve. When DaVinci Resolve loads these hijacked Dylibs, the malicious code executes with the elevated privileges of the DaVinci Resolve process, leading to privilege escalation. This can allow an attacker to gain control over the system.
3. Known Exploits & Attack Vectors:
- Dylib Hijacking (Dynamic Library Hijacking): This is the primary exploit vector. An attacker can create a malicious Dylib with a name that DaVinci Resolve might attempt to load (e.g., by mimicking a dependency). Due to the
rwxrwxrwxpermissions, the attacker can write this malicious Dylib to the DaVinci Resolve application directory. When DaVinci Resolve is launched, it loads the malicious Dylib, executing the attacker’s code with DaVinci Resolve’s privileges. - Attack Scenario:
- Attacker identifies a Dylib that DaVinci Resolve attempts to load, potentially through static analysis or dynamic monitoring.
- Attacker creates a malicious Dylib with the same name as the target.
- Attacker leverages the
rwxrwxrwxpermissions to copy the malicious Dylib into the DaVinci Resolve application directory. - The next time DaVinci Resolve is launched, it loads the attacker’s Dylib, executing the malicious code.
- The attacker can then leverage this elevated access to install malware, steal data, or perform other malicious actions.
4. Remediation Strategy:
The primary remediation is to update DaVinci Resolve to version 19.1.3 or later. This update should address the file permissions issue directly.
Immediate Action (Required):
- Upgrade DaVinci Resolve: Immediately upgrade all affected DaVinci Resolve installations to version 19.1.3 or later. This is the most effective solution and directly addresses the root cause of the vulnerability.
- Verify the Update: After upgrading, verify the installation and confirm the corrected permissions on the DaVinci Resolve application directory.
Permission Correction (If Upgrade is Not Immediately Possible):
- Change File Permissions: If an immediate upgrade is not possible, manually correct the file permissions on the DaVinci Resolve application directory using the
chmodcommand in Terminal. Open the Terminal application and execute the following command, replacing/Applications/DaVinci Resolve/with the actual path to your DaVinci Resolve application directory: sudo chmod -R 755 “/Applications/DaVinci Resolve/” This command sets the permissions todrwxr-xr-x(755), which is the recommended and more secure configuration. The-Rflag applies the changes recursively to all files and subdirectories within the DaVinci Resolve application directory. You may be prompted for your administrator password. - Verify Permissions: After changing the permissions, verify they are set correctly using the
ls -ldcommand: ls -ld “/Applications/DaVinci Resolve/” The output should displaydrwxr-xr-xas the directory’s permissions.
- Change File Permissions: If an immediate upgrade is not possible, manually correct the file permissions on the DaVinci Resolve application directory using the
5. Mitigation Strategy:
In addition to remediation, the following mitigation steps can help reduce the risk:
- Principle of Least Privilege: Ensure that user accounts have only the necessary permissions to perform their tasks. Avoid granting administrator privileges unnecessarily.
- Endpoint Detection and Response (EDR) Solutions: Deploy and maintain EDR solutions that can detect and respond to suspicious activity, including Dylib hijacking attempts. EDR can help identify and block malicious code execution.
- Security Awareness Training: Educate users about the risks of software vulnerabilities and the importance of keeping their software up to date.
- Regular Security Audits: Conduct regular security audits to identify and address potential vulnerabilities in your systems and applications.
- File Integrity Monitoring: Implement file integrity monitoring to detect unauthorized changes to critical files, including those within the DaVinci Resolve application directory. This can help identify if a malicious Dylib has been injected.
6. Monitoring and Verification:
- Post-Remediation Verification: After applying the remediation steps (upgrade or permission correction), verify that the vulnerability is no longer present by:
- Confirming the correct file permissions on the DaVinci Resolve application directory.
- Attempting to exploit the vulnerability (e.g., by trying to inject a Dylib). This should be done in a controlled testing environment.
- Continuous Monitoring: Implement ongoing monitoring to detect any attempts to exploit the vulnerability or any unauthorized changes to the DaVinci Resolve installation. Regularly review security logs and alerts.
7. Communication:
- Communicate the vulnerability and the remediation/mitigation steps to all affected users.
- Provide clear instructions on how to upgrade DaVinci Resolve or correct the file permissions.
- Keep users informed of any updates or new information regarding the vulnerability.
8. Rollback Plan (If Applicable):
While an upgrade is recommended, in the unlikely event of issues with the new version, the rollback plan would involve:
- Reverting to the previous version of DaVinci Resolve.
- Immediately implementing the manual permission correction (chmod) detailed above.
- Thoroughly testing the reverted version to ensure stability and functionality.
By implementing these remediation and mitigation steps, you can significantly reduce the risk of exploitation associated with CVE-2025-1413. Prioritize upgrading to DaVinci Resolve version 19.1.3 or later as this is the most effective and complete solution.
Assigner
- CERT.PL [email protected]
Date
- Published Date: 2025-02-28 08:25:25
- Updated Date: 2025-02-28 09:15:12