CVE-2018-25366 globalscape CVE debrief

Who should care

System administrators managing legacy Windows environments, security teams responsible for software inventory and vulnerability management, and organizations with historical deployments of Globalscape CuteFTP should prioritize identification and removal of this obsolete software version.

Technical summary

CVE-2018-25366 is a buffer overflow vulnerability (CWE-120) in CuteFTP 5.0 XP's Site Manager label field. The vulnerability allows local attackers to execute arbitrary code by injecting a payload exceeding 520 bytes. When a shortcut is created and launched, the oversized payload overwrites the return address on the stack, redirecting execution to attacker-controlled shellcode. The vulnerability requires local access and user interaction but results in complete system compromise. CuteFTP 5.0 XP is an obsolete software version that should be removed from all environments.

Defensive priority

HIGH

Recommended defensive actions

• Remove or disable CuteFTP 5.0 XP from all systems; this version is obsolete and should be replaced with a supported FTP client
• If CuteFTP must be used, upgrade to a current version from Globalscape with modern security controls
• Implement application whitelisting to prevent execution of unauthorized or legacy FTP clients
• Monitor for suspicious process execution originating from CuteFTP or related shortcuts
• Review endpoint detection and response (EDR) policies for indicators of local privilege escalation attempts

Evidence notes

The vulnerability description indicates a classic stack-based buffer overflow (CWE-120) in the Site Manager label field. The 520-byte threshold for payload injection suggests a fixed-size buffer without proper bounds checking. The attack requires local access and user interaction (creating and launching a shortcut), but successful exploitation yields complete compromise of confidentiality, integrity, and availability.

Official resources