CVE-2026-48098 in NexTor IP Changer
Summary
by MITRE • 08/07/2026
NexTor IP Changer is a command-line tool that leverages the Tor network to periodically rotate a user's IP address. Versions prior to 2.0.0 execute privileged system commands using `sudo` and `shell=True` directly inside application logic. In environments where passwordless sudo (`NOPASSWD`) is enabled, privileged commands may execute silently without explicit user confirmation. Version 2.0.0 fixes the issue.
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Analysis
by VulDB Data Team • 08/07/2026
The NexTor IP Changer tool presents a critical security vulnerability through its improper handling of privileged system commands within its application logic. This flaw manifests when the software executes commands with elevated privileges using sudo in conjunction with shell=True parameters, creating an environment where arbitrary command execution becomes possible. The vulnerability stems from the application's direct invocation of system-level operations without proper input sanitization or privilege separation mechanisms.
The technical implementation of this vulnerability allows attackers to exploit the tool's use of shell=True parameter within sudo commands, which creates a path for command injection attacks. When passwordless sudo configurations are present in the target environment, these privileges can be leveraged silently without requiring explicit user confirmation or authentication prompts. This scenario represents a dangerous privilege escalation vector that directly violates security best practices and industry standards such as those outlined in CWE-78 and CWE-20.
The operational impact of this vulnerability extends beyond simple command execution, potentially enabling full system compromise when exploited by malicious actors. Attackers could inject malicious commands through the vulnerable execution paths, leading to unauthorized access, data exfiltration, or system manipulation. The silent execution nature of the vulnerability means that users remain unaware of the privilege escalation attempts, making detection and mitigation significantly more challenging.
Security professionals should note that this vulnerability directly relates to ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and T1548.1 which addresses 'Abuse Elevation Control Mechanism'. The issue demonstrates a fundamental flaw in privilege management where the application fails to properly validate inputs or implement secure coding practices when handling elevated privileges.
The remediation approach involves upgrading to version 2.0.0 or later, which addresses the core issue through proper command execution methods that do not rely on shell=True parameters with sudo. Additionally, organizations should review their sudo configurations to ensure passwordless access is restricted to only necessary applications and users. System administrators should implement proper input validation, use secure coding practices for privilege handling, and conduct regular security assessments of third-party tools. The fix demonstrates the importance of proper privilege separation and input sanitization in preventing command injection vulnerabilities that could lead to complete system compromise.
The vulnerability serves as a reminder of critical security considerations when developing tools that require elevated privileges, emphasizing the need for defense-in-depth approaches and adherence to secure coding standards. Organizations should implement comprehensive monitoring for unauthorized privilege usage and maintain updated security policies governing the use of privileged commands within automated environments.