CVE-2021-40266 Explained : Impact and Mitigation
Learn about CVE-2021-40266, a vulnerability in FreeImage before 1.18.0. Discover its impact, affected systems, exploitation method, and mitigation steps.
CVE-2021-40266 is a vulnerability found in FreeImage before version 1.18.0, specifically in the ReadPalette function within PluginTIFF.cpp. This flaw can lead to a null pointer dereference.
Understanding CVE-2021-40266
This section provides an insight into the details of CVE-2021-40266.
What is CVE-2021-40266?
CVE-2021-40266 is a security vulnerability present in FreeImage, affecting the ReadPalette function in PluginTIFF.cpp. It allows for a null pointer dereference, posing a risk to system stability and security.
The Impact of CVE-2021-40266
The vulnerability in CVE-2021-40266 could be exploited by attackers to cause a denial of service or potentially execute arbitrary code on the system where FreeImage is used.
Technical Details of CVE-2021-40266
This section delves into the technical aspects of the CVE-2021-40266 vulnerability.
Vulnerability Description
The vulnerability in FreeImage before version 1.18.0 stems from insufficient input validation in the ReadPalette function, leading to a null pointer dereference.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: All versions prior to 1.18.0 are affected.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a malicious input that triggers the vulnerable ReadPalette function, causing a null pointer dereference and potentially leading to a system crash or arbitrary code execution.
Mitigation and Prevention
In this section, you will find recommendations on mitigating the risks associated with CVE-2021-40266.
Immediate Steps to Take
- Upgrade FreeImage to version 1.18.0 or later to eliminate the vulnerability.
- Users are advised to apply patches provided by the FreeImage project promptly.
Long-Term Security Practices
- Regularly monitor for security advisories related to FreeImage and promptly apply updates.
- Employ robust input validation mechanisms in software development to prevent similar vulnerabilities.
Patching and Updates
Ensure timely installation of security patches and updates released by FreeImage to address CVE-2021-40266 and other potential vulnerabilities.