CVE-2022-37358 in PDF-XChange Editor
Summary
by MITRE • 03/29/2023
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of JPG files. Crafted data in a JPG file can trigger a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17632.
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Analysis
by VulDB Data Team • 06/18/2026
CVE-2022-37358 represents a critical buffer overflow vulnerability affecting PDF-XChange Editor versions up to 9.5.344. This weakness falls under CWE-121, which describes heap-based buffer overflow conditions where data is written beyond the boundaries of allocated memory regions. The vulnerability specifically manifests during the parsing of jpeg image files within the PDF processing pipeline, making it particularly dangerous as PDF documents frequently contain embedded image resources. The flaw enables attackers to craft malicious jpeg files that trigger a write past the end of an allocated buffer, allowing for arbitrary code execution within the context of the current process. This type of vulnerability directly aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1548.001 for abuse of privileges, as successful exploitation grants attackers the ability to execute malicious code with the privileges of the vulnerable application. The attack requires user interaction through either visiting a malicious webpage or opening a crafted pdf file containing the malicious jpeg payload, making this a typical client-side attack vector that leverages social engineering tactics to deliver the exploit. The vulnerability's impact extends beyond simple code execution as it can potentially allow for privilege escalation, remote code execution, and full system compromise depending on the privileges of the target application. The buffer overflow occurs during jpeg parsing operations where insufficient bounds checking allows crafted data to overwrite adjacent memory regions, potentially corrupting critical program structures or injecting malicious code into the application's execution flow. This vulnerability demonstrates the importance of robust input validation and memory safety practices in document processing applications, particularly those handling multimedia content within document formats. The exploitation of this vulnerability requires careful crafting of jpeg metadata and image data to ensure the buffer overflow occurs at a predictable memory location, allowing for successful code injection and execution. Organizations utilizing PDF-XChange Editor should prioritize immediate patching to address this vulnerability, as the combination of remote exploitability and user interaction requirements makes it a significant threat vector. The vulnerability's classification as a heap-based buffer overflow emphasizes the need for memory safety practices and proper bounds checking in image parsing libraries. This issue highlights the broader challenge of securing document processing applications against malicious content, particularly when dealing with complex file formats that contain embedded multimedia elements. The vulnerability's potential for privilege escalation makes it particularly concerning for enterprise environments where PDF processing applications may run with elevated privileges. Security professionals should implement network monitoring to detect suspicious pdf file transfers and ensure that users are educated about the risks of opening untrusted pdf documents containing embedded images. The patching process should include verification that the updated version properly handles jpeg file parsing without exhibiting the buffer overflow behavior, ensuring that the fix addresses the root cause rather than merely masking symptoms. This vulnerability serves as a reminder of the critical importance of input validation in multimedia processing applications and the potential consequences when such validation is insufficient. The ATT&CK framework categorization of this vulnerability as a privilege escalation and code execution vector underscores the need for comprehensive security measures including application whitelisting, network segmentation, and regular security assessments of document processing applications. Organizations should also consider implementing sandboxing mechanisms for pdf processing to contain potential exploitation attempts and limit the damage that could result from successful attacks against vulnerable applications. The vulnerability demonstrates how seemingly benign image processing functionality can become a critical security risk when proper memory safety controls are not implemented.