CVE-2024-8834 in PDF-XChange
Summary
by MITRE • 11/23/2024
PDF-XChange Editor TIF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability. 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 TIF files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-24319.
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Analysis
by VulDB Data Team • 03/09/2025
The CVE-2024-8834 vulnerability represents a critical out-of-bounds read flaw within PDF-XChange Editor's handling of TIF file parsing operations, classified under CWE-125 as an "Out-of-bounds Read" condition. This vulnerability specifically affects the software's ability to process TIF image files, where insufficient input validation allows maliciously crafted data to trigger memory access violations that can lead to information disclosure. The flaw exists in the software's image processing pipeline where TIF file structures are parsed without adequate bounds checking, creating a scenario where an attacker can manipulate the parsing logic to read memory locations beyond the intended data boundaries.
The exploitation of this vulnerability requires user interaction, making it a client-side attack vector that typically manifests when users visit malicious websites or open compromised TIF files. This characteristic places the vulnerability within the ATT&CK framework's technique T1203 - Exploitation for Client Execution, where adversaries leverage software vulnerabilities to execute code on target systems. The attack scenario begins with an attacker crafting a malicious TIF file or hosting a webpage containing embedded malicious TIF content that, when processed by the vulnerable PDF-XChange Editor, triggers the out-of-bounds read condition. The vulnerability's potential for information disclosure stems from the ability to read adjacent memory regions that may contain sensitive data such as stack contents, heap data, or other process memory segments that could reveal system state information.
The operational impact of CVE-2024-8834 extends beyond simple information disclosure, as it creates a potential pathway for more severe exploitation techniques that could lead to arbitrary code execution. When combined with other vulnerabilities present in the same software environment or system, this out-of-bounds read condition can serve as a stepping stone for attackers to gain deeper system access. The vulnerability affects installations where PDF-XChange Editor is used for document processing, particularly in environments where users may encounter untrusted TIF files through web browsing or document sharing activities. The lack of proper bounds checking in the TIF parsing component means that any TIF file, regardless of its intended purpose, can potentially trigger this vulnerability when processed by the vulnerable software.
Security mitigations for this vulnerability should focus on immediate software updates from the vendor, as the flaw requires changes to the TIF parsing logic to implement proper input validation and bounds checking mechanisms. Organizations should implement network-based protections such as web application firewalls that can detect and block suspicious TIF file content, while also considering endpoint protection measures that monitor for unusual file processing activities. The vulnerability's classification as an information disclosure issue means that defensive measures should include monitoring for anomalous memory access patterns and implementing strict file validation policies that prevent processing of untrusted TIF files. Additionally, user education regarding the risks of opening untrusted files and visiting suspicious websites remains crucial in reducing the attack surface for this vulnerability, particularly in enterprise environments where PDF-XChange Editor is widely deployed for document management and viewing purposes.