CVE-2022-42413 in PDF-XChange Editor
Summary
by MITRE • 01/26/2023
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 JP2 files. Crafted data in a JP2 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-18368.
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Analysis
by VulDB Data Team • 04/29/2025
CVE-2022-42413 represents a critical buffer over-read vulnerability affecting PDF-XChange Editor software that enables remote attackers to extract sensitive information through malicious JP2 file manipulation. This vulnerability resides within the software's JP2 file parsing functionality and demonstrates a classic memory safety issue that has been categorized under CWE-125 as "Out-of-bounds Read." The flaw occurs when the application processes crafted JP2 files containing malformed data structures that cause the parser to read beyond the boundaries of allocated memory buffers. This particular vulnerability requires user interaction to be exploited, meaning that victims must either visit a malicious webpage or open a specially crafted malicious file for the attack to succeed, making it a client-side exploitation vector that aligns with ATT&CK technique T1203 for "Exploitation for Client Execution."
The technical implementation of this vulnerability involves the JP2 file format parsing engine within PDF-XChange Editor failing to properly validate buffer boundaries during the processing of image data structures. When a malicious JP2 file is encountered, the parser attempts to read memory locations beyond the intended buffer limits, potentially exposing sensitive data from adjacent memory regions including stack contents, heap data, or other process memory segments. This read past the end of buffer condition creates opportunities for information disclosure attacks where attackers can extract cryptographic keys, session tokens, or other confidential information stored in memory. The vulnerability's potential for arbitrary code execution makes it particularly dangerous as it could be leveraged as a stepping stone for more sophisticated attacks, allowing adversaries to escalate privileges or establish persistent access to affected systems.
The operational impact of CVE-2022-42413 extends beyond simple information disclosure to encompass potential system compromise through exploitation chaining. Organizations utilizing PDF-XChange Editor in enterprise environments face significant risk exposure as this vulnerability can be weaponized through web-based attacks or file-sharing channels. The vulnerability's classification as a remote code execution risk means that attackers can potentially gain complete control over affected systems without requiring physical access. Security professionals should consider this vulnerability in the context of broader attack surface management and incident response planning, particularly when assessing the security posture of document processing applications. The vulnerability's relationship to ATT&CK technique T1068 for "Exploitation for Privilege Escalation" and T1550 for "Use of Unsecured Credentials" highlights the multi-layered threat potential that organizations must address through comprehensive security controls.
Mitigation strategies for CVE-2022-42413 should focus on immediate software patching as the primary defense mechanism, with organizations prioritizing the deployment of vendor-provided security updates. Network-based protections including web application firewalls and content filtering systems can help prevent access to malicious JP2 files through web interfaces. Additionally, user education and awareness programs should emphasize the dangers of opening untrusted files, particularly those containing image formats that may trigger such vulnerabilities. Organizations should implement strict file validation policies and consider sandboxing mechanisms for processing potentially malicious documents. The vulnerability's characteristics align with CWE-707 as "Improper Neutralization of Special Elements in Output Used by a Downstream Component," suggesting that proper input validation and output sanitization measures should be implemented to prevent similar issues in related systems. Security monitoring should include detection of suspicious file access patterns and memory read operations that could indicate exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to identify and remediate similar memory safety issues within the organization's software ecosystem, particularly in applications handling multimedia file formats.