CVE-2021-21100 : What You Need to Know

Adobe Digital Editions version 4.5.11.187245 (and earlier) is affected by a Privilege Escalation vulnerability during installation. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary file system write in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Understanding CVE-2021-21100

This CVE involves a Privilege Escalation vulnerability in Adobe Digital Editions that can lead to arbitrary file system write access with the involvement of user interaction.

What is CVE-2021-21100?

CVE-2021-21100 is a Privilege Escalation vulnerability in Adobe Digital Editions, allowing an unauthenticated attacker to perform arbitrary file system write operations.

The Impact of CVE-2021-21100

The impact of this vulnerability is rated as HIGH, affecting confidentiality, integrity, and availability. It requires no privileges to exploit, but user interaction is necessary.

Technical Details of CVE-2021-21100

This section covers the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows an attacker to achieve arbitrary file system write in the context of the current user during installation.

Affected Systems and Versions

Adobe Digital Editions versions 4.5.11.187245 and earlier are affected by this vulnerability.

Exploitation Mechanism

Exploitation of CVE-2021-21100 requires the victim to open a malicious file to trigger the privilege escalation.

Mitigation and Prevention

To address CVE-2021-21100, immediate steps need to be taken along with long-term security practices and timely patching and updates.

Immediate Steps to Take

Users are recommended to update Adobe Digital Editions to the latest version and avoid opening files from untrusted sources.

Long-Term Security Practices

Implement secure installation procedures, user awareness training, and regular security audits to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Adobe and promptly apply patches to mitigate the risk.