CVE-2017-2956 Explained : Impact and Mitigation

Adobe Acrobat Reader versions 15.020.20042 and earlier, 15.006.30244 and earlier, and 11.0.18 and earlier are affected by a use after free vulnerability in the JavaScript engine, allowing for arbitrary code execution.

Understanding CVE-2017-2956

This CVE involves an exploitable vulnerability in Adobe Acrobat Reader versions, potentially leading to the execution of arbitrary code.

What is CVE-2017-2956?

CVE-2017-2956 is a security vulnerability in Adobe Acrobat Reader versions 15.020.20042 and earlier, 15.006.30244 and earlier, and 11.0.18 and earlier. The vulnerability is related to the JavaScript engine and specifically involves manipulating the navigation pane.

The Impact of CVE-2017-2956

If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code on the affected system, potentially leading to unauthorized access, data theft, or further compromise of the system.

Technical Details of CVE-2017-2956

Adobe Acrobat Reader versions 15.020.20042 and earlier, 15.006.30244 and earlier, and 11.0.18 and earlier are susceptible to this use after free vulnerability.

Vulnerability Description

The vulnerability in the JavaScript engine of Adobe Acrobat Reader allows attackers to manipulate the navigation pane, leading to a use after free scenario and potential arbitrary code execution.

Affected Systems and Versions

Adobe Acrobat Reader 15.020.20042 and earlier
Adobe Acrobat Reader 15.006.30244 and earlier
Adobe Acrobat Reader 11.0.18 and earlier

Exploitation Mechanism

The vulnerability is exploited by manipulating the navigation pane within Adobe Acrobat Reader, triggering a use after free condition that could be leveraged to execute arbitrary code.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2017-2956.

Immediate Steps to Take

Update Adobe Acrobat Reader to the latest version available from the official Adobe website.
Consider disabling JavaScript in Adobe Acrobat Reader as a temporary mitigation measure.
Exercise caution when opening PDF files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities.
Implement security best practices such as network segmentation and least privilege access.

Patching and Updates

Adobe has released security updates to address CVE-2017-2956. Ensure that your Adobe Acrobat Reader is updated to the latest patched version to mitigate the risk of exploitation.