CVE-2024-9398 Information disclosure in Firefox

What is CVE-2024-9398?

CVE-2024-9398 is a medium-severity vulnerability in Mozilla Firefox, published on 1 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

Weakness: CWE-203

Which versions are affected by CVE-2024-9398?

It affects 2 products.

Products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2024-9398?

Upgrade to a fixed version.

Is CVE-2024-9398 being exploited?

There is no known exploitation of CVE-2024-9398 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 DEBIAN-CVE-2024-9398, GHSA-3qpq-hc75-5535, UBUNTU-CVE-2024-9398.