CVE-2024-29943 Memory corruption in Firefox

What is CVE-2024-29943?

CVE-2024-29943 is a critical memory corruption vulnerability in Mozilla Firefox, published on 22 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by fooling range-based bounds check elimination. This vulnerability affects Firefox < 124.0.1.

Weakness: CWE-787, CWE-125

Which versions are affected by CVE-2024-29943?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2024-29943?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-29943 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-29943 exists.

Public exploit code: 3 proofs of concept on GitHub.

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-gv5g-5832-j3rm, UBUNTU-CVE-2024-29943.