CVE-2016-5259 Use after free in n/a
Remote attackers can execute arbitrary code in Firefox by exploiting a use-after-free flaw in Service Worker handling.
- 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-2016-5259?
CVE-2016-5259 is a high-severity use after free vulnerability in Mozilla Firefox, published on 5 Aug 2016. 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
Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.
Weakness: CWE-416
Which versions are affected by CVE-2016-5259?
It affects 2 products.
Products include Mozilla Firefox, Oracle Linux.
How do I fix CVE-2016-5259?
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-2016-5259 being exploited?
There is no known exploitation of CVE-2016-5259 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2016-5259, GHSA-93fp-mg63-wc9r, UBUNTU-CVE-2016-5259.