CVE-2023-37209 Use after free in Firefox
A use-after-free in Firefox allows attackers to potentially execute arbitrary code via a reused reference to a freed object.
- 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-2023-37209?
CVE-2023-37209 is a high-severity use after free vulnerability in Mozilla Firefox, published on 5 Jul 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
A use-after-free condition existed in `NotifyOnHistoryReload` where a `LoadingSessionHistoryEntry` object was freed and a reference to that object remained. This resulted in a potentially exploitable condition when the reference to that object was later reused. This vulnerability affects Firefox < 115.
Weakness: CWE-416
Which versions are affected by CVE-2023-37209?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2023-37209?
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-2023-37209 being exploited?
There is no known exploitation of CVE-2023-37209 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-qvg2-h6w2-cvwj, UBUNTU-CVE-2023-37209.