CVE-2022-38476 Use after free in Firefox ESR
A use-after-free vulnerability in Firefox ESR and Thunderbird allows attackers to execute arbitrary code via a race condition during master password changes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-38476?
CVE-2022-38476 is a high-severity use after free vulnerability in Mozilla Firefox Esr, published on 22 Dec 2022. 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 data race could occur in the <code>PK11_ChangePW</code> function, potentially leading to a use-after-free vulnerability. In Firefox, this lock protected the data when a user changed their master password. This vulnerability affects Firefox ESR < 102.2 and Thunderbird < 102.2.
Weakness: CWE-416
Which versions are affected by CVE-2022-38476?
It affects 2 products.
Products include Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2022-38476?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2022-38476 being exploited?
There is no known exploitation of CVE-2022-38476 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox Esr
Sources
Also known as DEBIAN-CVE-2022-38476, GHSA-mj64-2668-m2rv, UBUNTU-CVE-2022-38476.