CVE-2002-0317 in Gator
Summary
by MITRE
Gator ActiveX component (IEGator.dll) 3.0.6.1 allows remote web sites to install arbitrary software by specifying a Trojan Gator installation file (setup.ex_) in the src parameter.
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Analysis
by VulDB Data Team • 10/23/2024
The vulnerability identified as CVE-2002-0317 represents a critical security flaw in the Gator ActiveX component version 3.0.6.1, specifically affecting Internet Explorer through the IEGator.dll library. This issue stems from improper input validation within the ActiveX control implementation, creating a dangerous attack vector that allows remote malicious websites to execute arbitrary software installation on vulnerable systems. The vulnerability operates through a simple yet effective mechanism where an attacker can manipulate the src parameter of the ActiveX component to point to a specially crafted Trojan file named setup.ex_, which then gets executed automatically during the installation process.
The technical exploitation of this vulnerability occurs when a user visits a malicious website that loads the vulnerable ActiveX control with a crafted src parameter pointing to the attacker-controlled setup.ex_ file. This file typically contains malicious code that gets downloaded and executed with the privileges of the user browsing the compromised website. The vulnerability is particularly dangerous because it leverages the trust model inherent in ActiveX controls, where browsers automatically execute components that are properly signed and installed on the system. The flaw resides in the component's failure to properly validate or sanitize input parameters, allowing arbitrary file paths to be specified in the src attribute without proper security checks.
The operational impact of this vulnerability extends beyond simple software installation, as it enables full system compromise through the installation of trojan horses, keyloggers, rootkits, and other malicious software. Attackers can use this vulnerability to establish persistent backdoors, steal sensitive information, or create botnet nodes without requiring any user interaction beyond visiting a malicious website. This represents a classic example of a drive-by download attack that exploits the trust relationship between the browser and ActiveX controls, making it particularly difficult to detect and prevent through traditional security measures.
Security professionals should note that this vulnerability aligns with CWE-20, which addresses "Improper Input Validation," and represents a significant weakness in the input sanitization process of ActiveX components. The attack pattern follows common techniques described in the MITRE ATT&CK framework under the Tactic of Execution, specifically targeting the use of ActiveX controls for malicious code execution. Organizations should implement immediate mitigations including disabling ActiveX controls in Internet Explorer, implementing strict content security policies, and ensuring all ActiveX components are properly updated and validated. The vulnerability also highlights the importance of proper software supply chain security and the risks associated with third-party components that lack proper input validation and security hardening measures.