CVE-2022-34477 Information disclosure in Firefox

What is CVE-2022-34477?

CVE-2022-34477 is a high-severity vulnerability in Mozilla Firefox, published on 22 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The MediaError message property should be consistent to avoid leaking information about cross-origin resources; however for a same-site cross-origin resource, the message could have leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 102.

Weakness: CWE-203

Which versions are affected by CVE-2022-34477?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2022-34477?

Upgrade to a fixed version.

Is CVE-2022-34477 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-34477 exists.

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-hc2g-x3vc-qhj4, UBUNTU-CVE-2022-34477.