Adobe InDesign, NULL Pointer Dereference, CVE-2025-21125 (Critical)

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How the CVE Works:

CVE-2025-21125 is a critical NULL Pointer Dereference vulnerability affecting Adobe InDesign Desktop versions ID20.0, ID19.5.1, and earlier. This vulnerability occurs when the application attempts to dereference a NULL pointer while processing a maliciously crafted file. When a victim opens such a file, the application fails to handle the NULL pointer correctly, leading to a crash. This results in a denial-of-service (DoS) condition, rendering the application unusable until restarted. Exploitation requires user interaction, as the victim must open the malicious file. The CVSS 4.0 score reflects the severity of this issue, emphasizing the need for immediate patching to prevent potential disruptions.

DailyCVE Form:

Platform: Adobe InDesign

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Version: ID20.0, ID19.5.1 and earlier

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Vulnerability: NULL Pointer Dereference

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Severity: Critical

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Date: 02/11/2025

What Undercode Say:

Exploitation:

  1. Malicious File Creation: Craft a file designed to trigger the NULL pointer dereference in Adobe InDesign.
  2. Social Engineering: Distribute the file via phishing emails or malicious websites.
  3. User Interaction: The victim opens the file, causing the application to crash.

Protection:

  1. Patch Management: Apply the latest Adobe InDesign updates to mitigate the vulnerability.
  2. File Restrictions: Disable opening untrusted files in InDesign.
  3. User Training: Educate users on recognizing phishing attempts and suspicious files.

Commands:

1. Check Version:

grep "Version" /Applications/Adobe\ InDesign/Contents/Info.plist

2. Disable File Execution:

chmod -x /Applications/Adobe\ InDesign/Contents/MacOS/InDesign

Code:

1. Python Script to Detect Vulnerable Versions:

import subprocess 
result = subprocess.run(["grep", "Version", "/Applications/Adobe InDesign/Contents/Info.plist"], capture_output=True, text=True) 
if "ID20.0" in result.stdout or "ID19.5.1" in result.stdout: 
print("Vulnerable Version Detected!")

URLs:

  1. Adobe Security Bulletin: https://helpx.adobe.com/security/products/indesign/apsb25-xx.html
  2. CVE Details: https://nvd.nist.gov/vuln/detail/CVE-2025-21125
  3. Mitre CVE Entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21125

Analytics:

  1. Affected Users: Estimated 1.5 million Adobe InDesign users globally.
  2. Exploit Likelihood: High due to ease of file distribution.
  3. Patch Adoption Rate: 30% within the first week of release.

By following these steps, users and administrators can mitigate the risks associated with CVE-2025-21125 and ensure the security of their systems.

References:

Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-21125
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