CVE-2023-6205 Use after free in Firefox
An attacker can trigger a use-after-free in MessagePort handling, potentially leading to exploitable crashes or code execution in Firefox and Thunderbird.
- 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-2023-6205?
CVE-2023-6205 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 21 Nov 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
It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Weakness: CWE-416
Which versions are affected by CVE-2023-6205?
It affects 4 products.
Products include Debian Debian Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2023-6205?
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-2023-6205 being exploited?
There is no known exploitation of CVE-2023-6205 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2023-6205, GHSA-h4m4-6cfw-5q6g, UBUNTU-CVE-2023-6205.