Horizon Alert
Summary of the vulnerability and why it matters
A stack-based buffer overflow vulnerability exists in the Apache httpd server's mod_cgi module within SonicWall SMA 100 series appliances. This flaw allows an unauthenticated remote attacker to execute code on the appliance. Successful exploitation could lead to unauthorized control of the affected device, enabling attackers to install malware, intercept sensitive data, or access protected internal networks. This could result in a significant compromise of organizational security and data integrity.
- Vulnerable SMA 100 appliances.
- Flaw allows remote code execution.
- Business impact includes data compromise.
Attack Path
How an attacker could exploit the issue
This vulnerability impacts SonicWall SMA 100 series appliances by allowing remote, unauthenticated attackers to execute code. The attack exploits a buffer overflow in the Apache httpd server's mod_cgi module when handling environment variables. Successful exploitation grants the attacker control as a 'nobody' user on the appliance.
- Exposure: Internet-facing appliance.
- Attacker access: Send crafted HTTP request.
- Trigger and result: Overflow buffer, gain code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability presents a critical risk, allowing unauthenticated attackers to execute code remotely on affected SonicWall appliances. The exploitation does not require sophisticated skills and can lead to significant compromise of the appliance's integrity and confidentiality. Given the potential for widespread impact and the known exploitation, organizations should prioritize addressing this issue.
- Likely attacker skill level: Low
- Required access or conditions: None
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability allows an unauthenticated remote attacker to potentially execute code on the appliance. Organizations should address this risk by identifying affected assets, mitigating exposure, applying vendor-provided fixes, validating the implementation, and monitoring for related activity.
- Identify affected SonicWall SMA appliances.
- Reduce exposure or isolate risk.
- Apply vendor fix and validate.
- Monitor for related issues.
