CVE-2017-7784 Use after free in n/a
A use-after-free flaw in image observer handling allows attackers to cause a crash or potentially execute arbitrary code via crafted web content.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-7784?
CVE-2017-7784 is a critical use after free vulnerability in Debian Debian Linux, published on 11 Jun 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 reading an image observer during frame reconstruction after the observer has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
Weakness: CWE-416
Which versions are affected by CVE-2017-7784?
It affects 10 products.
Products include Debian Debian Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop and 4 more.
How do I fix CVE-2017-7784?
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-2017-7784 being exploited?
There is no known exploitation of CVE-2017-7784 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-7784, GHSA-mhrc-3vwx-42rv, UBUNTU-CVE-2017-7784.