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CVE-2025-43594: Out-of-Bounds Write Vulnerability in InDesign Desktop

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Overview

The recent discovery of a significant vulnerability in InDesign Desktop versions 19.5.3 and earlier has raised alarm in the cybersecurity world. This vulnerability, designated as CVE-2025-43594, is an out-of-bounds write vulnerability that could potentially allow arbitrary code execution in the context of the current user. With the widespread use of InDesign Desktop, this vulnerability poses a significant risk to users globally, placing their systems and sensitive data at risk of compromise or leakage.

Vulnerability Summary

CVE ID: CVE-2025-43594
Severity: High (7.8 CVSS score)
Attack Vector: Local File
Privileges Required: None
User Interaction: Required
Impact: System compromise or data leakage upon successful exploit

Affected Products

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Product | Affected Versions

InDesign Desktop | 19.5.3 and earlier

How the Exploit Works

The vulnerability, an out-of-bounds write issue, occurs when specially crafted data is processed by an affected version of InDesign Desktop. When a user opens a malicious file, the software fails to properly restrict the boundaries of a buffer, allowing an attacker to write data outside of the allocated memory. This can lead to corruption of adjacent memory and could result in arbitrary code execution in the context of the current user.

Conceptual Example Code

In a conceptual scenario, an attacker might create a malicious InDesign file with embedded code like this:

<Root>
<BufferOverflow>
<Data>malicious_code_here</Data>
</BufferOverflow>
</Root>

The ‘malicious_code_here’ represents a harmful payload that will be executed once the file is opened by a user. This could be designed to compromise the system or enable data leakage.

Mitigation Guidance

Users are strongly advised to apply the vendor-supplied patch for this vulnerability as soon as possible. If the patch cannot be applied immediately, consider using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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