CVE-2021-29955 : What You Need to Know
CVE-2021-29955 involves a Floating Point Value Injection vulnerability in Firefox ESR and Firefox, enabling attackers to leak memory addresses and execute JIT type confusion attacks. Update to versions 78.9+ and 87+ for protection.
This CVE involves a transient execution vulnerability named Floating Point Value Injection (FPVI) that could allow an attacker to leak arbitrary memory addresses and potentially execute JIT type confusion attacks. The affected products include Firefox ESR versions less than 78.9 and Firefox versions less than 87.
Understanding CVE-2021-29955
This section delves into the vulnerability and its implications.
What is CVE-2021-29955?
The vulnerability FPVI enables attackers to obtain sensitive information stored in memory and execute JIT type confusion attacks on affected systems.
The Impact of CVE-2021-29955
The vulnerability poses a risk of leaking memory addresses and executing malicious code on vulnerable systems, potentially leading to unauthorized access and data theft.
Technical Details of CVE-2021-29955
Explore the specifics of the CVE.
Vulnerability Description
The FPVI vulnerability in Firefox ESR and Firefox versions allows for the unauthorized access and potential manipulation of sensitive memory data, posing a significant security risk.
Affected Systems and Versions
Mozilla's Firefox ESR versions prior to 78.9 and Firefox versions before 87 are vulnerable to this exploit, exposing users of these versions to potential attacks.
Exploitation Mechanism
Exploiting this vulnerability involves leveraging FPVI to retrieve memory addresses and potentially execute JIT type confusion attacks, enabling attackers to compromise system integrity.
Mitigation and Prevention
Learn how to protect your systems from CVE-2021-29955.
Immediate Steps to Take
Users are advised to update their Firefox ESR to version 78.9 or above and Firefox to version 87 or newer to mitigate the risk associated with this vulnerability.
Long-Term Security Practices
Implement robust security measures and best practices to defend against potential exploitation of transient execution vulnerabilities and ensure system integrity.
Patching and Updates
Regularly apply security patches and updates provided by Mozilla to address known vulnerabilities and enhance the security posture of your systems.