PDF-XChange Editor RTF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

Vulnerability Details

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 RTF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Fixed in version 10.4.2.390 https://www.pdf-xchange.com/support/security-bulletins.html

Disclosure Timeline

• 2024-10-01 - Vulnerability reported to vendor
• 2025-01-31 - Coordinated public release of advisory
• 2025-01-31 - Advisory Updated

Credit

Rocco Calvi (@TecR0c) with TecSecurity

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