CVE-2023-23604 Creation of duplicate SystemPrincipal from less secure contexts

What is CVE-2023-23604?

CVE-2023-23604 is a medium-severity vulnerability in Mozilla Firefox, published on 2 Jun 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A duplicate `SystemPrincipal` object could be created when parsing a non-system html document via `DOMParser::ParseFromSafeString`. This could have lead to bypassing web security checks. This vulnerability affects Firefox < 109.

Weakness: CWE-863

Which versions are affected by CVE-2023-23604?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2023-23604?

Upgrade to a fixed version.

Is CVE-2023-23604 being exploited?

There is no known exploitation of CVE-2023-23604 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-5997-5448-jfqf, UBUNTU-CVE-2023-23604.