CVE-2025-55048: OS Command Injection RCE Vulnerability

CVE-2025-55048 Overview

CVE-2025-55048 is a critical OS command injection vulnerability (CWE-78) that allows remote attackers to execute arbitrary system commands on affected systems. This vulnerability enables unauthenticated attackers to inject malicious commands through network-accessible interfaces without requiring user interaction, potentially leading to complete system compromise.

Critical Impact

Remote attackers can execute arbitrary operating system commands without authentication, potentially gaining full control of affected systems, exfiltrating sensitive data, or establishing persistent access for further attacks.

Affected Products

• Product information not available in current CVE data
• Consult the Israeli Government CVE Advisories for specific affected products
• Organizations should review their assets for systems matching the vulnerability profile

Discovery Timeline

• September 9, 2025 - CVE-2025-55048 published to NVD
• September 11, 2025 - Last updated in NVD database

Technical Details for CVE-2025-55048

Vulnerability Analysis

This vulnerability falls under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS Command Injection. The flaw occurs when user-controllable input is incorporated into operating system commands without proper sanitization or validation.

The vulnerability is network-exploitable and requires no privileges or user interaction to execute, making it particularly dangerous in internet-facing deployments. Successful exploitation allows attackers to execute commands with the privileges of the vulnerable application, which may include root or system-level access depending on the deployment configuration.

Command injection vulnerabilities of this nature typically arise when applications construct shell commands using string concatenation with untrusted input, pass user data directly to functions like system(), exec(), popen(), or shell interpreters, or fail to implement proper input validation and output encoding.

Root Cause

The root cause of CVE-2025-55048 is improper neutralization of special shell metacharacters in user-supplied input before incorporating it into OS commands. Characters such as ;, |, &, $(), and backticks can be used to terminate the intended command and inject arbitrary commands. The application fails to sanitize or escape these dangerous characters, allowing attackers to break out of the intended command context.

Attack Vector

The attack vector is network-based, meaning attackers can exploit this vulnerability remotely over the network without requiring local access to the target system. The low attack complexity indicates that exploitation is straightforward and does not require specialized conditions or extensive preparation.

Attackers typically exploit command injection vulnerabilities by identifying input fields that are processed by backend shell commands, injecting shell metacharacters followed by malicious commands, and observing the results through direct output, timing-based inference, or out-of-band data exfiltration.

Since no verified code examples are available for this vulnerability, organizations should consult the Israeli Government CVE Advisories for specific technical details and exploitation patterns related to CVE-2025-55048.

Detection Methods for CVE-2025-55048

Indicators of Compromise

• Unusual process spawning from web server or application processes, particularly shell interpreters (/bin/sh, /bin/bash, cmd.exe, powershell.exe)
• Unexpected outbound network connections from application servers to external hosts
• Command history or logs showing reconnaissance commands such as whoami, id, hostname, or cat /etc/passwd
• Creation of new user accounts, scheduled tasks, or cron jobs by application processes
• Presence of web shells or reverse shell scripts in application directories

Detection Strategies

• Deploy Web Application Firewalls (WAF) with rules to detect common command injection patterns including shell metacharacters
• Monitor application logs for input containing suspicious characters such as ;, |, &, $(), and backticks
• Implement process monitoring to detect anomalous child processes spawned by web applications
• Configure SIEM rules to correlate network-based attacks with suspicious local command execution

Monitoring Recommendations

• Enable comprehensive logging for all user input processing and command execution functions
• Monitor for DNS queries or HTTP requests to unknown external domains from application servers
• Track file system changes in application directories and system configuration files
• Implement network segmentation and monitor for lateral movement attempts following potential compromise

How to Mitigate CVE-2025-55048

Immediate Actions Required

• Review and identify all systems potentially affected by this vulnerability
• Implement network segmentation to limit exposure of vulnerable systems
• Deploy WAF rules to block common command injection attack patterns
• Monitor affected systems for indicators of compromise
• Disable or restrict network access to vulnerable components until patches are available

Patch Information

Specific patch information is not available in the current CVE data. Organizations should:

1. Monitor the Israeli Government CVE Advisories for vendor patches
2. Subscribe to vendor security bulletins for affected products
3. Apply patches immediately upon release due to the critical severity
4. Test patches in a staging environment before production deployment

Workarounds

• Implement strict input validation using allowlists to permit only expected characters and patterns
• Use parameterized APIs or library functions instead of shell commands where possible
• Apply principle of least privilege to application service accounts to limit impact of successful exploitation
• Deploy network-level controls to restrict access to vulnerable services from untrusted networks
• Consider application-level sandboxing to contain potential command execution

# Example WAF rule to block common command injection patterns
# Add to your WAF configuration to help mitigate exploitation attempts
# Note: This is a defense-in-depth measure, not a complete fix

# Block requests containing common shell metacharacters
SecRule ARGS "@rx [;|&$\`]" "id:100001,phase:2,deny,status:403,msg:'Potential command injection attempt'"

# Block requests with common command injection payloads  
SecRule ARGS "@rx (;|\||&|$\(|`)(ls|cat|id|whoami|wget|curl|nc|bash|sh)" "id:100002,phase:2,deny,status:403,msg:'Command injection payload detected'"