CVE-2022-40958 : Security Advisory and Response
Learn about CVE-2022-40958 impacting Mozilla Firefox ESR, Thunderbird, and Firefox versions. Find out the risks, impact, affected systems, and mitigation steps.
A cookie injection vulnerability in Firefox ESR, Thunderbird, and Firefox could allow an attacker to overwrite cookies from a secure context, potentially leading to session fixation and other attacks.
Understanding CVE-2022-40958
This vulnerability impacts Firefox ESR versions below 102.3, Thunderbird versions below 102.3, and Firefox versions below 105.
What is CVE-2022-40958?
By injecting a cookie with special characters, an attacker on a shared subdomain could overwrite cookies from a secure context, enabling session fixation and other malicious activities.
The Impact of CVE-2022-40958
The vulnerability could result in unauthorized access to user sessions, allowing attackers to impersonate legitimate users and perform various malicious actions.
Technical Details of CVE-2022-40958
The details of the vulnerability, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability allows an attacker to set and overwrite cookies from a secure context by injecting a cookie with specific characters on a shared subdomain.
Affected Systems and Versions
- Mozilla Firefox ESR: versions prior to 102.3
- Mozilla Thunderbird: versions prior to 102.3
- Mozilla Firefox: versions below 105
Exploitation Mechanism
Attackers exploit this vulnerability by injecting a specially crafted cookie on a non-secure subdomain to manipulate cookies from a secure context.
Mitigation and Prevention
Effective steps to mitigate the risks associated with CVE-2022-40958.
Immediate Steps to Take
Users are advised to update their Firefox ESR, Thunderbird, and Firefox to the latest secure versions to prevent exploitation of this vulnerability.
Long-Term Security Practices
Implementing secure coding practices and regular security updates can help maintain the integrity of user sessions and prevent potential cookie injection attacks.
Patching and Updates
Stay informed about security advisories from Mozilla and apply patches promptly to address known vulnerabilities.