CVE-2022-31744 : Exploit Details and Defense Strategies
Learn about CVE-2022-31744, a security flaw detected in Mozilla products, allowing CSS injection to bypass Content Security Policy, impacting Firefox ESR, Thunderbird, and Firefox versions.
In December 2022, Mozilla published CVE-2022-31744, a security vulnerability that could allow an attacker to inject CSS into stylesheets to bypass a page's Content Security Policy. This CVE affects Firefox ESR, Thunderbird, and Firefox, impacting versions below specific thresholds.
Understanding CVE-2022-31744
This section provides insights into the nature of the vulnerability and its implications.
What is CVE-2022-31744?
CVE-2022-31744 is a security flaw that enables an attacker to inject CSS into stylesheets accessible via internal URIs, such as resource:, to circumvent a page's Content Security Policy.
The Impact of CVE-2022-31744
The vulnerability affects users of Firefox ESR versions below 91.11, Thunderbird versions below 102 and 91.11, as well as Firefox versions below 101.
Technical Details of CVE-2022-31744
Explore the specific technical aspects of CVE-2022-31744 below.
Vulnerability Description
The vulnerability allows malicious actors to inject CSS code into specific stylesheets, ultimately evading the security measures imposed by the Content Security Policy.
Affected Systems and Versions
Mozilla products, including Firefox ESR, Thunderbird, and Firefox, are vulnerable. Firefox ESR versions less than 91.11, Thunderbird versions less than 102 and 91.11, and Firefox versions less than 101 are impacted.
Exploitation Mechanism
By injecting CSS code into internal URIs like resource:, attackers can work around Content Security Policies, potentially leading to unauthorized actions on affected platforms.
Mitigation and Prevention
Discover the steps necessary to safeguard your systems and data against CVE-2022-31744.
Immediate Steps to Take
Users should update their Mozilla products to versions that contain patches addressing CVE-2022-31744. Monitoring for unusual activity is also advised.
Long-Term Security Practices
Employing robust security protocols and regularly updating software can help mitigate future risks associated with similar vulnerabilities.
Patching and Updates
Stay informed about security updates from Mozilla, especially those that address known security vulnerabilities like CVE-2022-31744.