Horizon Alert
Summary of the vulnerability and why it matters
WS_FTP Server contains a pre-authenticated .NET deserialization vulnerability within its Ad Hoc Transfer module. This flaw allows an attacker to execute arbitrary commands on the server's operating system. This could lead to compromised data and unauthorized system access, posing a significant business risk.
- Vulnerable WS_FTP Server Ad Hoc Transfer module
- .NET deserialization flaw
- Remote command execution and system compromise
Attack Path
How an attacker could exploit the issue
An attacker could exploit a vulnerability in the WS_FTP Server's Ad Hoc Transfer module. This module is exposed externally, allowing an attacker to trigger remote command execution. The attacker gains control over the underlying WS_FTP Server operating system, potentially impacting data and business operations.
- External exposure of Ad Hoc Transfer module.
- Attacker achieves remote command execution.
- System control and potential data impact.
Live Threat
Current exploitation, exposure, and threat context
A pre-authenticated attacker with a low skill level could exploit a .NET deserialization vulnerability in the Ad Hoc Transfer module of WS_FTP Server. This vulnerability allows for remote command execution on the operating system, potentially leading to significant data compromise and system disruption. Organizations should treat this as an urgent matter due to the high potential for damage and known exploitation.
- Low skill attacker can exploit.
- Requires unauthenticated network access.
- High business risk and urgency.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
The organization should address a critical vulnerability impacting WS_FTP Server. This issue enables a pre-authenticated attacker to execute remote commands on the server's operating system through the Ad Hoc Transfer module. Addressing this vulnerability is crucial to prevent unauthorized system access and potential data compromise.
- Identify WS_FTP Server instances.
- Isolate affected systems or restrict access.
- Apply vendor patches and validate.
- Monitor for suspicious activity.
