CVE-2025-52365: Stabilizer Command Injection Vulnerability

CVE-2025-52365 Overview

A command injection vulnerability exists in the szc script of the ccurtsinger/stabilizer repository that allows attackers to execute arbitrary system commands via unsanitized user input passed to os.system(). The vulnerability arises from improper input handling where command-line arguments are directly concatenated into shell commands without validation, enabling malicious actors to inject and execute arbitrary commands on the underlying system.

Critical Impact

Successful exploitation allows attackers with local access to execute arbitrary system commands, potentially leading to complete system compromise, data exfiltration, or lateral movement within the network.

Affected Products

• ccurtsinger/stabilizer repository - szc script
• Systems utilizing the stabilizer build tool with exposed szc functionality

Discovery Timeline

• 2026-03-03 - CVE-2025-52365 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2025-52365

Vulnerability Analysis

This command injection vulnerability (CWE-77) occurs within the szc script component of the stabilizer project. The fundamental issue lies in how user-supplied input is processed before being passed to the os.system() function in Python. Rather than sanitizing or validating command-line arguments, the script directly concatenates user input into shell command strings, creating an injection point that attackers can exploit.

The local attack vector requires an attacker to have access to execute the szc script with crafted arguments. Once exploited, the vulnerability grants the attacker the same privileges as the user running the script, enabling full compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause is improper input validation and neutralization of special elements used in shell commands. The szc script fails to implement proper input sanitization mechanisms before passing user-controlled data to os.system(). This violates secure coding practices that mandate all external input be treated as untrusted and properly escaped or validated before use in command execution contexts.

Attack Vector

The attack requires local access to execute the vulnerable szc script. An attacker crafts malicious input containing shell metacharacters and command sequences that, when concatenated into the shell command string, break out of the intended command context and execute arbitrary attacker-controlled commands.

The vulnerability manifests when user-supplied arguments are passed directly to os.system() without sanitization. For example, an attacker could inject shell metacharacters such as semicolons, pipes, or backticks to chain additional commands. Technical details and the vulnerable code patterns can be found in the GitHub CVE-2025-52365 Analysis and the szc source code.

Detection Methods for CVE-2025-52365

Indicators of Compromise

• Unexpected process spawning from Python scripts in the stabilizer directory
• Anomalous shell command execution patterns originating from szc script invocations
• Log entries showing unusual command-line arguments containing shell metacharacters (;, |, `, $())
• Suspicious outbound network connections following szc execution

Detection Strategies

• Monitor for process execution anomalies where szc or its parent Python process spawns unexpected child processes
• Implement file integrity monitoring on the szc script and related stabilizer components
• Deploy endpoint detection rules targeting command injection patterns in script arguments
• Analyze command-line audit logs for shell metacharacter sequences in stabilizer-related processes

Monitoring Recommendations

• Enable comprehensive command-line auditing on systems where stabilizer is deployed
• Configure SIEM alerts for patterns indicative of command injection attempts
• Monitor for privilege escalation attempts following szc script execution
• Implement behavioral analysis to detect unusual command sequences

How to Mitigate CVE-2025-52365

Immediate Actions Required

• Restrict access to the szc script to only trusted users who require it
• Review and audit any systems where the stabilizer tool is deployed
• Implement input validation wrapper scripts that sanitize arguments before passing to szc
• Consider disabling or removing the szc script if not actively required

Patch Information

As of the last NVD update on 2026-03-03, no official vendor patch has been released. Organizations should monitor the ccurtsinger/stabilizer GitHub repository for security updates and patches. In the absence of an official fix, implement the workarounds and mitigations described below.

Workarounds

• Replace os.system() calls with safer alternatives such as subprocess.run() with shell=False and proper argument lists
• Implement strict input validation to reject or escape shell metacharacters in user-supplied arguments
• Run the szc script in a sandboxed or containerized environment with restricted privileges
• Use application-level firewalls or security wrappers to filter malicious input patterns

# Example mitigation: Restrict szc script permissions
chmod 750 /path/to/stabilizer/szc
chown root:trusted-group /path/to/stabilizer/szc

# Create wrapper script with basic input sanitization
# Note: This is a temporary workaround - proper code remediation is recommended