CVE-2021-44703 : Security Advisory and Response

Adobe Acrobat Pro DC version 21.007.20099 and earlier, 20.004.30017 and earlier, and 17.011.30204 and earlier are affected by a stack buffer overflow vulnerability, potentially leading to arbitrary code execution.

Understanding CVE-2021-44703

Adobe Acrobat Pro DC is prone to a stack buffer overflow vulnerability that could allow an attacker to execute arbitrary code on the affected system.

What is CVE-2021-44703?

The vulnerability in Adobe Acrobat Pro DC arises from insecure handling of specially crafted files, enabling an attacker to trigger a stack buffer overflow, potentially leading to arbitrary code execution with the privileges of the current user. Successful exploitation requires the victim to interact with a malicious file.

The Impact of CVE-2021-44703

The impact of this vulnerability is rated as high severity, with a CVSS base score of 7.8. The exploit could lead to unauthorized code execution, posing risks to confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-44703

This section delves into specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability is a stack buffer overflow (CWE-121) due to inadequate handling of crafted files, facilitating arbitrary code execution.

Affected Systems and Versions

Adobe Acrobat Reader DC version 21.007.20099 and earlier
Adobe Acrobat Reader DC version 20.004.30017 and earlier
Adobe Acrobat Reader DC version 17.011.30204 and earlier

Exploitation Mechanism

The exploit requires user interaction where a victim opens a malicious file, triggering the stack buffer overflow and leading to execution of arbitrary code.

Mitigation and Prevention

Protective measures and actions to mitigate the vulnerability.

Immediate Steps to Take

Update Adobe Acrobat Reader DC to the latest patched version.
Avoid opening files from untrusted sources or unknown senders.
Exercise caution while interacting with files from external parties.

Long-Term Security Practices

Regularly update software to patch vulnerabilities.
Educate users on safe file handling practices.
Implement advanced threat detection mechanisms.

Patching and Updates

Adobe has released patches addressing the vulnerability. Ensure timely installation of updates to safeguard systems.