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How CVE-2025-30320 Works
CVE-2025-30320 is a NULL pointer dereference vulnerability in Adobe InDesign (versions ID19.5.2, ID20.2 and earlier). When processing a maliciously crafted file, the application fails to validate pointer references, leading to a dereference of a NULL pointer. This occurs during file parsing when specific malformed structures trigger an unexpected memory access. The dereference causes the application to crash, resulting in denial-of-service (DoS). Attackers can exploit this by tricking users into opening a specially designed .indd file. The vulnerability has a medium severity due to requiring user interaction and only causing application crashes rather than remote code execution.
DailyCVE Form
Platform: Adobe InDesign
Version: ≤ ID19.5.2, ID20.2
Vulnerability: NULL Pointer Dereference
Severity: Medium
Date: 05/14/2025
What Undercode Say:
Analytics:
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (5.5 Medium)
- Exploitability: Low (requires user interaction)
- Affected Components: File parsing module
Exploitation:
1. Craft malicious .indd file with malformed structures.
- Trigger NULL pointer dereference via invalid object reference.
3. Cause application crash (DoS).
PoC (Conceptual):
import struct
with open("exploit.indd", "wb") as f:
f.write(b"\x00" 1024) Malformed header
f.write(struct.pack("<I", 0xFFFFFFFF)) Invalid offset
Detection:
Check InDesign version grep -i "Adobe InDesign" /Applications/Adobe\ InDesign/Version.plist
Mitigation:
1. Update to latest Adobe InDesign version.
2. Disable opening untrusted .indd files.
3. Apply sandboxing via OS-level restrictions.
Patch Analysis:
Adobe fixed this by adding NULL pointer checks before dereferencing objects during file parsing.
Workaround:
<!-- Disable .indd file association (Windows) --> <association extension=".indd" progid="NoOpen" />
Memory Protection:
Enable DEP/ASLR to reduce impact (though limited for DoS).
Logging:
Monitor logs for repeated crashes:
tail -f /var/log/system.log | grep "InDesign Crash"
References:
– Adobe Security Bulletin: APSB25-XX
– CWE-476: NULL Pointer Dereference
– Mitre ATT&CK: T1499 (Endpoint Denial of Service)
Sources:
Reported By:
Extra Source Hub:
Undercode
