CVE-2021-45055 : What You Need to Know

Adobe InCopy version 16.4 (and earlier) is affected by an out-of-bounds read vulnerability. This could lead to remote code execution by manipulating crafted files.

Understanding CVE-2021-45055

Adobe InCopy is susceptible to a critical out-of-bounds read vulnerability when processing specific files, potentially resulting in the execution of malicious code.

What is CVE-2021-45055?

The vulnerability in Adobe InCopy allows an attacker to overrun memory structures when parsing a malicious file.
Successful exploitation could enable an attacker to execute arbitrary code within the context of the victim user.
User interaction is required as the attack vector involves opening a tainted file.

The Impact of CVE-2021-45055

CVSS Base Score: 7.8 (High)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2021-45055

Adobe InCopy's vulnerability involves parsing crafted files, leading to the potential for remote code execution.

Vulnerability Description

The vulnerability results from incorrect handling of files, allowing a malicious actor to control the execution flow.

Affected Systems and Versions

Affected Product: InCopy
Vendor: Adobe
Vulnerable Versions: Up to 16.4

Exploitation Mechanism

Attackers can exploit this vulnerability by enticing victims to open a specially crafted file, triggering malicious code execution.

Mitigation and Prevention

Adobe has released guidance to mitigate the risks associated with CVE-2021-45055.

Immediate Steps to Take

Users should refrain from opening untrusted or suspicious files, especially those received from unknown sources.
Implement file validation mechanisms to identify and block potentially harmful content.

Long-Term Security Practices

Regularly update Adobe InCopy to the latest version to ensure patches for known vulnerabilities.
Train users on recognizing and avoiding phishing attempts that may deliver malicious files.

Patching and Updates

Apply the latest security updates and patches provided by Adobe to fix the vulnerability and enhance system security.