CVE-2022-34468 : Security Advisory and Response

This article discusses the details of CVE-2022-34468, a vulnerability affecting Firefox, Firefox ESR, and Thunderbird.

Understanding CVE-2022-34468

CVE-2022-34468 is a vulnerability that allows an iframe not permitted to run scripts to execute them when a user clicks on a

javascript:

link. This vulnerability impacts Firefox versions less than 102, Firefox ESR versions less than 91.11, Thunderbird versions less than 102, and Thunderbird versions less than 91.11.

What is CVE-2022-34468?

CVE-2022-34468 enables an iframe to bypass CSP sandbox header restrictions by executing scripts through a retargeted

javascript:

URI.

The Impact of CVE-2022-34468

This vulnerability can be exploited by malicious actors to run unauthorized scripts within the affected browsers and email clients, potentially leading to further attacks such as information disclosure or unauthorized access.

Technical Details of CVE-2022-34468

Vulnerability Description

The vulnerability arises from a lack of proper script execution restrictions for iframes within the affected applications, leading to script execution despite restrictions.

Affected Systems and Versions

Mozilla Firefox: Versions less than 102 are affected.
Mozilla Firefox ESR: Versions less than 91.11 are impacted.
Mozilla Thunderbird: Versions less than 102 and less than 91.11 are vulnerable.

Exploitation Mechanism

Malicious entities can exploit this vulnerability by enticing users to click on malicious

javascript:

links, which trigger unintended script execution.

Mitigation and Prevention

Immediate Steps to Take

To mitigate the risk associated with CVE-2022-34468, users are advised to update their browsers and email clients to the latest patched versions. Additionally, exercise caution while clicking on links from untrusted sources.

Long-Term Security Practices

Enforcing strict content security policies (CSP) and educating users about the dangers of clicking on unverified links can help prevent similar vulnerabilities in the future.

Patching and Updates

Mozilla has released security updates to address CVE-2022-34468. Users are urged to apply these patches promptly to secure their systems against potential exploitation.