Symbolic Link Race Condition in Bitdefender Total Security and Internet Security

Executive Summary

This vulnerability is an Improper link resolution before file access (also known as 'link following') issue in the File Shredder module of Bitdefender Total Security and Internet Security on Windows.

A less-privileged local user can exploit this vulnerability to elevate their privileges on the system. The vulnerability involves race conditions via symbolic links, meaning an attacker could manipulate file paths by creating or replacing symbolic links in a way that tricks the software into performing unintended actions on files or directories.

The affected products are Bitdefender Total Security and Internet Security versions before 27.0.58.315.

Useful 0 Not Useful 0

Detection Guidance

Detecting this vulnerability requires checking for the presence of vulnerable versions of Bitdefender Total Security or Internet Security on Windows systems. Since the issue involves a race condition via symbolic links in the File Shredder module, direct detection via network scanning is unlikely. Instead, focus on verifying installed software versions.

• Check the installed version of Bitdefender Total Security or Internet Security on Windows systems. The vulnerability affects versions before 27.0.58.315.
• Use the following command in Windows Command Prompt to query installed software versions: wmic product where "name like 'Bitdefender%%'" get name, version.
• Alternatively, check the version via the Bitdefender GUI by navigating to Settings > About.

If the installed version is earlier than 27.0.58.315, the system is vulnerable. There are no specific network-based detection methods for this local privilege escalation vulnerability.

Useful 0 Not Useful 0

Impact Analysis

If you are using an affected version of Bitdefender Total Security or Internet Security on Windows, this vulnerability could allow a local attacker with limited privileges to gain elevated rights on your system.

• An attacker could potentially access, modify, or delete sensitive files they would not normally have permission to.
• The attacker could install malicious software or make unauthorized system changes, leading to further compromise of your device or data.
• This could result in data loss, unauthorized access to personal or confidential information, or disruption of system operations.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could impact compliance with several standards and regulations, depending on the context in which the affected software is used.

• GDPR: If the vulnerability leads to unauthorized access or exposure of personal data, it could result in a breach of GDPR requirements, particularly those related to data protection and security. Organizations may face fines or penalties if they fail to protect personal data adequately.
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could lead to unauthorized access or disclosure of PHI, violating HIPAA's Security Rule. This could result in legal consequences and fines.
• Other standards: Depending on the industry, this vulnerability could also affect compliance with frameworks like ISO 27001, NIST, or PCI DSS, which require robust access controls and protection against privilege escalation attacks.

To maintain compliance, it is critical to apply the available patches or updates to mitigate this vulnerability.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, follow these steps:

• Update Bitdefender Total Security or Internet Security to version 27.0.58.315 or later. This is the primary fix for the vulnerability.
• If immediate updating is not possible, restrict access to the File Shredder module for less-privileged users until the update is applied.
• Monitor for unusual symbolic link creation or file access patterns that may indicate exploitation attempts, though this is not a substitute for patching.
• Ensure that local user accounts have the least privileges necessary to reduce the impact of potential exploitation.

Useful 0 Not Useful 0