CVE-2012-5324 in PDF-XChange
Summary
by MITRE
Multiple buffer overflows in the Pdf Printer Preferences ActiveX Control in pdfxctrl.dll in Tracker Software PDF-XChange 3.60.0128 allow remote attackers to excute arbitrary code via a long string in the (1) sub_path parameter to the StoreInRegistry function or (2) sub_key parameter to the InitFromRegistry function.
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Analysis
by VulDB Data Team • 08/03/2025
The vulnerability identified as CVE-2012-5324 represents a critical buffer overflow flaw within the Pdf Printer Preferences ActiveX Control component of Tracker Software PDF-XChange version 3.60.0128. This security weakness resides in the pdfxctrl.dll library and manifests through improper input validation mechanisms that fail to adequately sanitize user-supplied data. The vulnerability specifically affects two distinct function calls within the ActiveX control where insufficient bounds checking allows attackers to overwrite adjacent memory locations through carefully crafted input strings.
The technical exploitation of this vulnerability occurs through two primary attack vectors that leverage different parameter handling within the ActiveX control's registry operations. The first vector targets the StoreInRegistry function where a lengthy string passed as the sub_path parameter can trigger a buffer overflow condition. The second vector exploits the InitFromRegistry function through manipulation of the sub_key parameter, creating similar memory corruption scenarios. Both attack paths demonstrate the fundamental flaw in the control's implementation where input validation is insufficient to prevent buffer overflows, allowing attackers to overwrite critical memory structures including return addresses and function pointers.
This vulnerability presents significant operational impact for systems running affected versions of PDF-XChange software, as it enables remote code execution without requiring local system access. Attackers can leverage this weakness to inject malicious code into the target system's memory space, potentially gaining full control over the affected machine. The ActiveX control's integration with web browsers and other applications creates multiple attack surfaces where unauthenticated remote exploitation becomes possible, making this vulnerability particularly dangerous in enterprise environments where PDF processing is commonly utilized. The buffer overflow conditions can lead to arbitrary code execution, system compromise, and potential data exfiltration.
Organizations should prioritize immediate remediation through official vendor patches and updates to address this vulnerability. The recommended mitigation strategy includes disabling the problematic ActiveX control in web browsers, implementing strict input validation policies, and monitoring for suspicious registry access patterns. From a security framework perspective, this vulnerability aligns with CWE-121 which addresses stack-based buffer overflow conditions, and represents a classic example of improper input validation leading to memory corruption. The attack vectors associated with this vulnerability map directly to ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands on the compromised system. System administrators should also consider implementing application whitelisting controls and network segmentation to limit the potential impact of successful exploitation attempts.