CVE-2021-21775 : What You Need to Know

A detailed overview of CVE-2021-21775 highlighting the vulnerability, its impact, technical details, and mitigation steps.

Understanding CVE-2021-21775

This section provides insight into the use-after-free vulnerability found in Webkit WebKitGTK 2.30.4.

What is CVE-2021-21775?

CVE-2021-21775 is a use-after-free vulnerability discovered in Webkit WebKitGTK 2.30.4. It stems from the incorrect processing of certain events for ImageLoader objects, posing a risk of information exposure and memory corruption when a user visits a malicious webpage.

The Impact of CVE-2021-21775

With a CVSS base score of 6.8 (Medium severity), the vulnerability requires low privileges and user interaction to exploit. It can compromise confidentiality by allowing an attacker to execute arbitrary code or trigger a denial of service attack.

Technical Details of CVE-2021-21775

Explore the specific technical aspects associated with CVE-2021-21775.

Vulnerability Description

The vulnerability arises from the mishandling of events for ImageLoader objects in Webkit WebKitGTK 2.30.4, leading to a use-after-free scenario that can be exploited for information leakage and memory corruption.

Affected Systems and Versions

Webkit WebKitGTK 2.30.4 is identified as the affected version, emphasizing the importance of updating to a secure version to mitigate the risk.

Exploitation Mechanism

To trigger the vulnerability, an attacker needs to lure a user into accessing a specially crafted malicious webpage, exploiting the flawed event processing within ImageLoader objects.

Mitigation and Prevention

Discover the recommended mitigation strategies to address CVE-2021-21775 effectively.

Immediate Steps to Take

Users should refrain from visiting untrusted or suspicious websites to minimize the risk of falling victim to exploitation. Implementing web filters and security tools can also enhance protection.

Long-Term Security Practices

Practicing good cybersecurity hygiene, such as keeping software up to date, using security patches, and staying informed about potential threats, can fortify defenses against similar vulnerabilities.

Patching and Updates

It is crucial to apply the latest software patches and updates provided by Webkit to remediate CVE-2021-21775 and prevent potential security breaches.