CVE-2020-9729 in InDesign
Summary
by MITRE
A memory corruption vulnerability exists in InDesign 15.1.1 (and earlier versions). Insecure handling of a malicious indd file could be abused to cause an out-of-bounds memory access, potentially resulting in code execution in the context of the current user.
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Analysis
by VulDB Data Team • 05/05/2025
The vulnerability identified as CVE-2020-9729 represents a critical memory corruption flaw within Adobe InDesign version 15.1.1 and earlier releases. This issue stems from inadequate input validation and memory management when processing maliciously crafted indd files, which are the native file format used by Adobe InDesign for document storage and exchange. The flaw manifests when the application attempts to parse and render malformed content within these files, creating a pathway for attackers to exploit the software's memory handling mechanisms. The vulnerability falls under the category of buffer overflows and out-of-bounds memory access conditions that are commonly classified as CWE-121 and CWE-125 within the Common Weakness Enumeration framework, representing fundamental memory safety issues that can lead to arbitrary code execution.
The technical exploitation of this vulnerability occurs when a malicious indd file is opened within Adobe InDesign, triggering an improper memory access pattern that allows attackers to manipulate the application's memory space. The insecure handling of file parsing operations creates opportunities for attackers to craft specific payloads that cause the application to read or write beyond allocated memory boundaries. This type of memory corruption can be leveraged to execute arbitrary code with the privileges of the currently logged-in user, potentially enabling full system compromise. The attack vector is particularly concerning as it requires no special privileges or advanced technical knowledge beyond the ability to distribute a malicious file, making it an attractive target for attackers seeking to exploit end-user applications.
From an operational perspective, the impact of this vulnerability extends beyond simple memory corruption, as it represents a significant escalation path for attackers who may already have compromised a user's system through other means. The vulnerability affects users who frequently work with design documents and may unknowingly open malicious files, creating a persistent threat vector that can be exploited through social engineering campaigns or compromised file sharing networks. The fact that this flaw exists in widely used creative software platforms means that organizations with design departments, advertising agencies, or any entity utilizing InDesign are potentially at risk. The vulnerability's exploitation can result in data theft, system compromise, and unauthorized access to sensitive creative assets that organizations rely upon for their business operations. Organizations must consider the broader implications of this vulnerability within their attack surface, particularly in environments where users have elevated privileges or access to critical systems.
Mitigation strategies for CVE-2020-9729 should prioritize immediate software updates from Adobe, as the company has released patches addressing this specific vulnerability in later versions of InDesign. System administrators should implement strict file validation policies, including sandboxing mechanisms and automated malware scanning for all incoming design files, particularly those received through email or file sharing platforms. The implementation of principle of least privilege controls can help minimize the potential impact of successful exploitation by ensuring that InDesign applications run with minimal user privileges. Network-based protections such as email filtering and web application firewalls should be configured to block suspicious file types and prevent the distribution of potentially malicious indd files through corporate networks. Security teams should also consider implementing endpoint detection and response solutions that can monitor for anomalous behavior patterns associated with memory corruption exploits, providing early warning capabilities for potential exploitation attempts. The vulnerability's classification under the ATT&CK framework as a software exploitation technique highlights the importance of maintaining up-to-date threat intelligence and implementing comprehensive security awareness training to reduce the risk of social engineering attacks that might leverage this vulnerability.