CVE-2021-21036 Explained : Impact and Mitigation
Learn about CVE-2021-21036 impacting Adobe Acrobat Reader DC. Discover the potential for arbitrary code execution due to an Integer Overflow vulnerability, its impact, and mitigation steps.
Adobe Acrobat Reader DC versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier), and 2017.011.30188 (and earlier) are impacted by an Integer Overflow vulnerability. This flaw could be exploited by an unauthenticated attacker to execute arbitrary code within the user's context, requiring user interaction by opening a malicious file.
Understanding CVE-2021-21036
Adobe Acrobat Reader DC is prone to an Integer Overflow vulnerability, which could result in arbitrary code execution.
What is CVE-2021-21036?
The vulnerability in Adobe Acrobat Reader DC allows attackers to trigger an Integer Overflow, enabling them to execute arbitrary code in the context of the user.
The Impact of CVE-2021-21036
With a CVSS base score of 7.8, this vulnerability has a high severity impact on confidentiality, integrity, and availability. An attacker can exploit this issue with local access without privileges, but user interaction is necessary.
Technical Details of CVE-2021-21036
The following technical details shed light on the vulnerability.
Vulnerability Description
The Integer Overflow vulnerability in Adobe Acrobat Reader DC allows for arbitrary code execution.
Affected Systems and Versions
Adobe Acrobat Reader DC versions 2020.013.20074, 2020.001.30018, and 2017.011.30188 are affected.
Exploitation Mechanism
Attackers can exploit this vulnerability by tricking users into opening a malicious file.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21036, certain actions need to be taken.
Immediate Steps to Take
Users should update Adobe Acrobat Reader DC to the latest patched version as soon as possible. Exercise caution when opening files from unknown or untrusted sources.
Long-Term Security Practices
Employ security best practices such as keeping software up to date, using reliable security solutions, and educating users about safe file handling.
Patching and Updates
Regularly check for security updates from Adobe and apply them promptly to ensure protection against known vulnerabilities.