How the CVE Works:
CVE-2025-21124 is an out-of-bounds read vulnerability affecting Adobe InDesign Desktop versions ID20.0, ID19.5.1, and earlier. This vulnerability occurs when the software reads data beyond the intended boundary of a memory buffer. An attacker can exploit this by crafting a malicious file that, when opened by a victim, triggers the out-of-bounds read. This could lead to the disclosure of sensitive memory contents, potentially bypassing security mitigations like Address Space Layout Randomization (ASLR). Successful exploitation requires user interaction, as the victim must open the malicious file. The vulnerability is classified as critical due to its potential to compromise system integrity and confidentiality.
DailyCVE Form:
Platform: Adobe InDesign
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Version: ID20.0, ID19.5.1 and earlier
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Vulnerability: Out-of-Bounds Read
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Severity: Critical
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Date: 02/11/2025
What Undercode Say:
Exploitation:
- Craft a malicious `.indd` file with payload triggering out-of-bounds read.
- Use tools like Hex editors or scripting to manipulate file headers.
- Distribute the file via phishing emails or malicious websites.
- Victim opens the file, triggering the vulnerability and leaking memory data.
Protection:
1. Update Adobe InDesign to the latest version.
2. Avoid opening untrusted `.indd` files.
- Enable ASLR and DEP (Data Execution Prevention) on the system.
- Use endpoint protection tools to detect malicious files.
Commands and Tools:
- Hex Editor: `xxd malicious_file.indd` to inspect file headers.
- GDB: Use `gdb -p
` to debug memory leaks.
3. Python Script: Automate payload generation for testing.
with open("malicious.indd", "wb") as f:
f.write(b"\x41" 1000) Example payload
4. Metasploit: Develop a module for CVE-2025-21124 exploitation.
URLs:
Analytics:
1. CVSS Score: 9.8 (Critical)
2. Attack Vector: Network (via malicious file)
3. Impact: Confidentiality and Integrity loss.
4. Patch Availability: Yes, via Adobe updates.
Detection:
- Use IDS/IPS rules to detect suspicious `.indd` file transfers.
2. Monitor memory access patterns for out-of-bounds reads.
Mitigation Code:
// Example: Bounds checking in C
void safe_read(char buffer, size_t size) {
if (size > MAX_BUFFER_SIZE) {
printf("Error: Buffer overflow detected.\n");
return;
}
// Safe memory read operation
}
References:
By following these steps, users can protect themselves from CVE-2025-21124 and mitigate potential risks.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-21124
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