CVE-2021-42533 : Security Advisory and Response

Adobe Bridge version 11.1.1 (and earlier) is affected by a double free vulnerability when parsing a crafted DCM file, potentially leading to arbitrary code execution. This CVE was published on October 26, 2021.

Understanding CVE-2021-42533

Adobe Bridge is vulnerable to a double free issue that could allow an attacker to execute arbitrary code by manipulating a specially crafted DCM file.

What is CVE-2021-42533?

The CVE-2021-42533 vulnerability in Adobe Bridge involves a double free flaw that arises during the processing of specifically constructed DCM files. If successfully exploited, this vulnerability may enable an attacker to execute arbitrary code within the privileges of the current user. Exploiting this vulnerability necessitates user interaction.

The Impact of CVE-2021-42533

The impact of this vulnerability is rated as high, with a CVSS base score of 7.8 due to the following factors:

Attack Complexity: Low
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: None
User Interaction: Required

Technical Details of CVE-2021-42533

This section covers specific technical aspects of the CVE.

Vulnerability Description

The vulnerability is a double free issue in Adobe Bridge that occurs during the processing of a crafted DCM file. Successful exploitation could lead to arbitrary code execution.

Affected Systems and Versions

Product: Adobe Bridge
Vendor: Adobe
Affected Versions: <= 11.1.1 (and unspecified versions)

Exploitation Mechanism

Exploiting this vulnerability requires an attacker to trick a user into opening a maliciously crafted DCM file, triggering the double free flaw and executing arbitrary code.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2021-42533.

Immediate Steps to Take

Update Adobe Bridge to a patched version that addresses the double free vulnerability.
Exercise caution when opening DCM files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and implement timely security patches.
Educate users about the risks of opening files from unfamiliar sources.
Employ endpoint protection solutions to detect and prevent such vulnerabilities.
Conduct security assessments and audits to identify and rectify potential weaknesses.

Patching and Updates

Adobe has likely released security updates to address CVE-2021-42533. Ensure that all systems running Adobe Bridge are updated to the latest secure version.