CVE-2013-4986 in PDFCool Studio
Summary
by MITRE
Stack-based buffer overflow in PDFAX0722_IconCool.dll 7.22.1125.2121 in IconCool PDFCool Studio 3.32 Build 130330 and earlier allows remote attackers to execute arbitrary code via a crafted PDF file.
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Analysis
by VulDB Data Team • 12/25/2024
The vulnerability CVE-2013-4986 represents a critical stack-based buffer overflow flaw discovered in the PDFAX0722_IconCool.dll component version 7.22.1125.2121, which is part of IconCool PDFCool Studio 3.32 Build 130330 and earlier versions. This vulnerability resides within the document processing functionality of a widely used PDF manipulation software suite that was commonly deployed in enterprise environments for document management and conversion tasks. The flaw manifests when the affected software processes specially crafted PDF files that contain malformed data structures designed to overflow the stack buffer allocated for processing PDF elements. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which occurs when more data is written to a buffer located on the stack than the buffer can accommodate, leading to memory corruption and potential code execution.
The technical exploitation of this vulnerability involves remote attackers crafting malicious PDF documents that contain oversized data fields or malformed structures specifically designed to trigger the buffer overflow condition. When the vulnerable PDFCool Studio software attempts to parse and render these malicious documents, the stack buffer overflow occurs during the processing of PDF elements such as embedded images, fonts, or other graphical components. The overflow corrupts adjacent memory locations including return addresses and function pointers on the stack, which can be overwritten with attacker-controlled data. This memory corruption allows adversaries to redirect program execution flow to malicious code injected into the process memory, effectively enabling arbitrary code execution with the privileges of the user running the vulnerable software. The vulnerability demonstrates characteristics consistent with the attack pattern described in the MITRE ATT&CK framework under technique T1203, where adversaries leverage software vulnerabilities to execute malicious code in the context of the target application.
The operational impact of this vulnerability extends beyond simple code execution as it represents a significant threat to enterprise security infrastructure that relies on PDF processing capabilities. Organizations using affected versions of PDFCool Studio may face unauthorized access to sensitive documents, potential data exfiltration, and complete system compromise when attackers exploit this vulnerability. The remote nature of the attack means that adversaries can leverage this vulnerability from outside the network perimeter without requiring local access or authentication. The vulnerability affects not only individual user workstations but also enterprise servers and document management systems that process untrusted PDF content from external sources such as email attachments, web downloads, or file sharing platforms. This makes the vulnerability particularly dangerous in environments where PDF files are routinely processed automatically or where users frequently open PDF documents from unknown sources.
Mitigation strategies for CVE-2013-4986 require immediate action to address the vulnerable software components. Organizations should prioritize updating to the latest versions of IconCool PDFCool Studio that contain patches for this vulnerability, as the vendor likely released security updates to address the buffer overflow condition. System administrators should implement network-based controls such as PDF file filtering and content inspection to prevent potentially malicious PDF files from reaching vulnerable systems. The principle of least privilege should be enforced by running the affected software with minimal required permissions and implementing application whitelisting policies to restrict execution of unauthorized software. Additionally, regular security assessments should include vulnerability scanning for outdated PDF processing components and network segmentation to limit the potential impact of successful exploitation. The vulnerability highlights the importance of maintaining up-to-date third-party software components and implementing comprehensive patch management procedures to protect against known security flaws in document processing applications that are frequently targeted by cyber adversaries.