CVE-2025-47097: InCopy Integer Underflow Vulnerability Leading to Arbitrary Code Execution

Overview

A significant vulnerability labeled CVE-2025-47097 has been identified in InCopy versions 20.3, 19.5.3 and earlier versions. This vulnerability is a notable security threat due to its potential to allow an attacker to execute arbitrary code in the context of the current user, potentially compromising the system or leading to data leakage. This flaw is a pressing concern to those users and organizations who rely on the affected InCopy versions, as it can be exploited if a user interacts with a malicious file.

Vulnerability Summary

CVE ID: CVE-2025-47097
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

InCopy | 20.3
InCopy | 19.5.3

How the Exploit Works

The exploit leverages an Integer Underflow (Wrap or Wraparound) vulnerability present in the affected InCopy versions. An attacker crafts a malicious file that, when opened by a victim, triggers the integer underflow. This condition can cause the program to operate in an unintended way, allowing the attacker to execute arbitrary code in the context of the user who opened the malicious file.

Conceptual Example Code

Below is a conceptual example of how an attacker might craft a malicious file to exploit this vulnerability. The exact details will vary depending on the specifics of the vulnerable system and the attacker’s goals.

# Pseudo code for malicious payload
import struct
def craft_malicious_file():
# Craft a file that triggers an integer underflow in the target application
buffer = struct.pack('<I', 0xFFFFFFFF)  # Underflow occurs when subtracted by 1
buffer += 'A' * 1024  # Add arbitrary code here
with open('malicious.icml', 'wb') as f:
f.write(buffer)
craft_malicious_file()

This script crafts a file (`malicious.icml`) that triggers an integer underflow when opened by the vulnerable application, potentially causing the application to execute the arbitrary code contained within the file.

Mitigation

Users are advised to apply the vendor patch as soon as it becomes available. In the meantime, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Ensure that these systems are configured to detect and block attempts to exploit this vulnerability. Regularly update your security systems to incorporate the latest threat intelligence.