CVE-2012-0439 in GroupWise
Summary
by MITRE
An ActiveX control in gwcls1.dll in the client in Novell GroupWise 8.0 before 8.0.3 HP2 and 2012 before SP1 HP1 allows remote attackers to execute arbitrary code via (1) a pointer argument to the SetEngine method or (2) an XPItem pointer argument to an unspecified method.
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Analysis
by VulDB Data Team • 01/04/2025
The vulnerability identified as CVE-2012-0439 represents a critical remote code execution flaw within Novell GroupWise client software, specifically affecting versions prior to 8.0.3 HP2 and 2012 SP1 HP1. This vulnerability resides within the gwcls1.dll ActiveX control, which is a component designed to facilitate integration with GroupWise email and collaboration services. The flaw stems from improper input validation and memory handling within the ActiveX control's method implementations, creating a pathway for malicious actors to execute arbitrary code on vulnerable systems. The vulnerability's exploitation potential is significant as it allows attackers to leverage web-based attack vectors through Internet Explorer or other browsers that support ActiveX controls, making it particularly dangerous in enterprise environments where GroupWise is commonly deployed.
The technical implementation of this vulnerability manifests through two distinct attack vectors that exploit different method calls within the ActiveX control. The first vector involves a pointer argument passed to the SetEngine method, where insufficient validation of input parameters allows attackers to manipulate memory references and potentially overwrite critical system memory locations. The second vector targets an unspecified method with an XPItem pointer argument, indicating another code path where improper pointer handling could lead to memory corruption. Both attack vectors fall under the category of buffer overflow and memory corruption vulnerabilities, which are classified as CWE-121, CWE-125, and CWE-787 according to the CWE standard. These vulnerabilities are particularly dangerous because they can be triggered through web-based attacks, allowing remote exploitation without requiring local system access or user interaction beyond visiting a malicious webpage.
The operational impact of CVE-2012-0439 extends beyond simple code execution, as successful exploitation can lead to complete system compromise and persistent access within enterprise networks. Attackers who successfully exploit this vulnerability can gain elevated privileges on affected systems, potentially leading to data exfiltration, system disruption, or further lateral movement within the network. The vulnerability's presence in GroupWise client software creates a significant risk for organizations that rely on this email platform, particularly those with users who may inadvertently visit malicious websites or receive crafted email attachments. The attack surface is broadened by the widespread deployment of GroupWise clients in business environments, making this vulnerability particularly attractive to threat actors seeking to establish persistent access or conduct targeted attacks against specific organizations. This vulnerability aligns with ATT&CK technique T1190, which describes the use of ActiveX controls for exploitation, and represents a classic example of how legacy software components can contain critical security flaws that persist for years.
Organizations affected by CVE-2012-0439 should prioritize immediate remediation through official vendor patches released in GroupWise 8.0.3 HP2 and 2012 SP1 HP1 updates. The mitigation strategy should include comprehensive network monitoring for exploitation attempts, particularly focusing on unusual ActiveX control usage patterns and web traffic to known malicious domains. Security teams should also consider implementing browser security restrictions that disable ActiveX controls in web browsers or configure Internet Explorer to run ActiveX controls in a restricted security zone. Additional defensive measures include network segmentation to limit lateral movement capabilities, enhanced email filtering to detect malicious content targeting GroupWise clients, and regular vulnerability assessments to identify other potentially vulnerable ActiveX components. The remediation process should also include user education about the risks of visiting untrusted websites and the importance of keeping software updated, as many organizations may not have immediate patch deployment capabilities due to the critical nature of GroupWise in their email infrastructure.