CVE-2023-29536 Use after free in Firefox
Attackers can trigger a use-after-free in the memory manager, leading to memory corruption, crashes, or potential 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-2023-29536?
CVE-2023-29536 is a high-severity use after free vulnerability in Mozilla Firefox, published on 2 Jun 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
An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled memory, resulting in an assertion, memory corruption, or a potentially exploitable crash. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.
Weakness: CWE-416
Which versions are affected by CVE-2023-29536?
It affects 5 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Firefox Mobile, Mozilla Focus, Mozilla Thunderbird.
How do I fix CVE-2023-29536?
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-2023-29536 being exploited?
There is no known exploitation of CVE-2023-29536 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2023-29536, GHSA-wg4p-p6rx-83xw, UBUNTU-CVE-2023-29536.