CVE-2021-21033 : Security Advisory and Response
Critical CVE-2021-21033 affects Adobe Acrobat Reader DC versions, enabling attackers to execute arbitrary code. Learn about impact, mitigation, and prevention.
A critical vulnerability has been discovered in Acrobat Reader DC versions 2020.013.20074 and earlier, 2020.001.30018 and earlier, as well as 2017.011.30188 and earlier. The vulnerability, identified as a Use After Free flaw, could be exploited by an unauthenticated attacker to execute arbitrary code within the user's context.
Understanding CVE-2021-21033
This section delves into the details of the CVE-2021-21033 vulnerability.
What is CVE-2021-21033?
The vulnerability in Adobe's Acrobat Reader DC could allow an attacker to execute arbitrary code on the victim's system with the user's privileges, by exploiting a Use After Free flaw.
The Impact of CVE-2021-21033
With a CVSS base score of 8.8 and a High severity rating, this vulnerability poses a significant risk. An attacker could exploit this flaw to achieve arbitrary code execution, potentially leading to a complete system compromise.
Technical Details of CVE-2021-21033
Let's explore the technical aspects of CVE-2021-21033.
Vulnerability Description
The vulnerability is a Use After Free flaw in Acrobat Reader DC versions, allowing an unauthenticated attacker to execute arbitrary code within the victim's context.
Affected Systems and Versions
Acrobat Reader DC versions 2020.013.20074, 2020.001.30018, and 2017.011.30188 are affected by this vulnerability.
Exploitation Mechanism
Successful exploitation of this vulnerability requires user interaction. The attacker needs to trick the victim into opening a malicious file.
Mitigation and Prevention
Discover how to mitigate the risks associated with CVE-2021-21033.
Immediate Steps to Take
Users are advised to update Acrobat Reader DC to a non-vulnerable version immediately. Additionally, exercise caution while opening files from untrusted sources.
Long-Term Security Practices
Implementing a robust security policy, regularly updating software, and educating users on safe computing practices can help prevent similar vulnerabilities in the future.
Patching and Updates
Adobe has released security updates to address this vulnerability. Users must apply the latest patches to secure their systems against potential exploitation.