CVE-2015-2094 in Winrds
Summary
by MITRE
Stack-based buffer overflow in the WESPPlayback.WESPPlaybackCtrl.1 control in WebGate WinRDS allows remote attackers to execute arbitrary code via unspecified vectors to the (1) PrintSiteImage, (2) PlaySiteAllChannel, (3) StopSiteAllChannel, or (4) SaveSiteImage function.
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Analysis
by VulDB Data Team • 07/04/2025
The vulnerability identified as CVE-2015-2094 represents a critical stack-based buffer overflow within the WESPPlayback.WESPPlaybackCtrl.1 ActiveX control component of WebGate WinRDS software. This flaw exists in the Windows operating system environment where ActiveX controls are executed with elevated privileges, creating a significant attack surface for remote code execution. The vulnerability specifically affects the PrintSiteImage, PlaySiteAllChannel, StopSiteAllChannel, and SaveSiteImage functions of the control, which are exposed through the component's interface and accessible to remote attackers. The buffer overflow occurs when the control processes user-supplied input without proper bounds checking, allowing attackers to overwrite adjacent memory locations on the stack. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue that has been consistently exploited in various security incidents over the years.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the ability to gain complete control over the affected system. When an attacker successfully exploits this buffer overflow, they can execute arbitrary code with the privileges of the user running the vulnerable ActiveX control, which typically runs with system-level privileges in web browsing contexts. The attack vector requires remote exploitation through web-based interfaces where the ActiveX control is loaded, making it particularly dangerous for enterprise environments where users may encounter malicious web content. This vulnerability directly aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: Visual Basic, as the exploitation often involves manipulating ActiveX controls through web interfaces. The vulnerability's presence in a widely used industrial control system component like WebGate WinRDS makes it especially concerning for critical infrastructure environments.
Mitigation strategies for CVE-2015-2094 should focus on immediate remediation through vendor-provided patches and comprehensive security hardening measures. Organizations must prioritize updating the WebGate WinRDS software to versions that address this specific buffer overflow vulnerability, as the vendor has likely released security patches to resolve the issue. Network-level protections should include disabling ActiveX controls in web browsers, implementing strict content filtering policies, and employing web application firewalls that can detect and block malicious input patterns targeting ActiveX components. Security teams should also consider implementing application whitelisting controls that prevent execution of untrusted ActiveX controls, particularly those from unknown vendors or with outdated versions. The vulnerability's nature makes it susceptible to exploitation through social engineering campaigns where users are tricked into visiting malicious websites or opening infected email attachments that load the vulnerable ActiveX control. Additionally, regular security assessments should include scanning for outdated ActiveX controls and ensuring proper privilege separation between user applications and system-level components. Organizations should also implement monitoring solutions that can detect anomalous behavior patterns consistent with buffer overflow exploitation attempts, including unusual memory access patterns or unexpected code execution sequences that may indicate exploitation of this and similar vulnerabilities.