CVE-2018-12377 Use after free in Firefox
A use-after-free flaw in Firefox and Thunderbird allows attackers to cause a crash or potentially execute arbitrary code during shutdown.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-12377?
CVE-2018-12377 is a critical use after free vulnerability in Canonical Ubuntu Linux, published on 18 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A use-after-free vulnerability can occur when refresh driver timers are refreshed in some circumstances during shutdown when the timer is deleted while still in use. This results in a potentially exploitable crash. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
Weakness: CWE-416
Which versions are affected by CVE-2018-12377?
It affects 10 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Mozilla Firefox, Mozilla Thunderbird, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server and 4 more.
How do I fix CVE-2018-12377?
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-2018-12377 being exploited?
There is no known exploitation of CVE-2018-12377 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-12377, GHSA-q5f8-grf8-9ff4, UBUNTU-CVE-2018-12377.