CVE-2015-2093 in Webeyeaudio
Summary
by MITRE
Stack-based buffer overflow in the Connect function in the WebGate WebEyeAudio ActiveX control allows remote attackers to execute arbitrary code via a crafted value.
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Analysis
by VulDB Data Team • 05/01/2022
The vulnerability identified as CVE-2015-2093 represents a critical stack-based buffer overflow flaw within the WebGate WebEyeAudio ActiveX control, specifically within its Connect function. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow conditions, where insufficient bounds checking allows an attacker to write data beyond the allocated stack buffer space. The ActiveX control, designed for web-based audio processing and communication, creates a dangerous attack surface when exploited through web browsers that support ActiveX components, particularly Internet Explorer.
The technical exploitation of this vulnerability occurs when a remote attacker crafts a malicious value and passes it to the Connect function of the WebEyeAudio ActiveX control. The flaw arises from inadequate input validation and buffer size management within the function implementation, allowing an attacker to overwrite adjacent stack memory locations. This overflow can potentially overwrite return addresses, function pointers, or other critical control data structures, enabling arbitrary code execution with the privileges of the affected user. The attack vector is particularly concerning as it requires no user interaction beyond visiting a malicious webpage, making it a prime candidate for drive-by download attacks and automated exploitation campaigns.
The operational impact of CVE-2015-2093 extends beyond simple code execution, as it provides attackers with a persistent foothold in compromised systems. The vulnerability affects systems running vulnerable versions of the WebGate WebEyeAudio ActiveX control, typically those deployed in enterprise environments where ActiveX controls are enabled for legitimate business purposes. Attackers can leverage this flaw to install backdoors, exfiltrate sensitive data, or establish command and control channels, making it particularly attractive for advanced persistent threat actors. The vulnerability also aligns with ATT&CK technique T1190 for Exploit Public-Facing Application, as it represents an exploitable entry point through web-based interfaces.
Mitigation strategies for CVE-2015-2093 should focus on immediate remediation through software updates from WebGate, as the vendor would have released patches addressing the buffer overflow condition. Organizations must also implement browser security measures including disabling ActiveX controls in web browsers, particularly Internet Explorer, and deploying application whitelisting solutions to prevent execution of untrusted ActiveX components. Network-level protections such as intrusion detection systems should be configured to monitor for exploitation attempts, while security teams should conduct comprehensive vulnerability assessments to identify all instances of the vulnerable ActiveX control throughout their infrastructure. The remediation process must also include user education to avoid visiting untrusted websites and understanding the risks associated with ActiveX controls in browser environments.