CVE-2022-37360 in PDF-XChange Editor
Summary
by MITRE • 03/29/2023
This vulnerability allows remote attackers to disclose sensitive information 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 EMF files. Crafted data in an EMF file can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-17635.
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Analysis
by VulDB Data Team • 06/18/2026
CVE-2022-37360 represents a critical buffer overread vulnerability affecting PDF-XChange Editor software that enables remote information disclosure and potential arbitrary code execution. This vulnerability resides within the software's handling of Enhanced Metafile (EMF) files, which are commonly used for vector graphics in Windows environments. The flaw manifests when the application processes malformed EMF files containing crafted data that causes the parser to read beyond the boundaries of allocated memory buffers. This type of vulnerability falls under CWE-125, known as "Out-of-Bounds Read," which represents one of the most prevalent categories of memory safety issues in software applications. The vulnerability requires user interaction to be exploited, meaning that an attacker must convince a target to visit a malicious webpage or open a specifically crafted EMF file that contains the malicious payload.
The technical exploitation of this vulnerability involves careful construction of EMF file data that triggers the buffer overread condition during the parsing process. When the PDF-XChange Editor attempts to parse the malicious EMF file, the parser reads memory locations beyond the intended buffer boundaries, potentially exposing sensitive data from adjacent memory regions. This information disclosure can include memory contents such as stack values, heap data, or other process memory segments that may contain authentication tokens, encryption keys, or other confidential information. The vulnerability's classification as a remote attack vector means that an attacker can potentially exploit this through web-based delivery mechanisms, making it particularly dangerous in modern networked environments where users frequently browse untrusted websites. The attack chain typically begins with a user visiting a malicious website containing the crafted EMF file, which then gets processed by the PDF-XChange Editor when the user attempts to view or interact with the content.
The operational impact of CVE-2022-37360 extends beyond simple information disclosure to potentially enable full system compromise when combined with other vulnerabilities. This vulnerability aligns with ATT&CK technique T1059.007, which covers "Command and Scripting Interpreter: JavaScript," as the exploitation may involve JavaScript-based delivery mechanisms to trigger the vulnerable parsing code. The read past the end of buffer condition can be leveraged by attackers to gain insights into memory layout and process structure, which are essential for more sophisticated exploitation techniques such as return-oriented programming (ROP) or stack spraying attacks. The vulnerability's presence in PDF-XChange Editor, a widely used document processing application, means that successful exploitation could compromise users' systems where the application is installed, potentially leading to unauthorized access to sensitive documents and system resources. Organizations using this software are particularly at risk since the vulnerability can be triggered through web browsing activities, which are common in enterprise environments.
Mitigation strategies for CVE-2022-37360 should focus on both immediate protective measures and long-term remediation efforts. The most effective immediate defense involves applying the vendor-provided security patches or updates that address the buffer overread condition in the EMF file parsing code. Organizations should also implement application whitelisting policies that restrict execution of potentially malicious files, particularly those with EMF extensions, and deploy web application firewalls that can detect and block malicious content delivery. Network segmentation and user education programs should be enhanced to reduce the attack surface and prevent users from inadvertently accessing malicious content. The vulnerability demonstrates the importance of input validation and memory safety practices in software development, particularly for applications that process untrusted file formats. Security teams should monitor for exploitation attempts through network traffic analysis and endpoint detection systems that can identify suspicious file processing activities. Additionally, the vulnerability highlights the need for regular security assessments of document processing applications, as these tools often become attack vectors due to their frequent interaction with potentially malicious content in email attachments, web downloads, and document sharing platforms.