CVE-2020-12417 Memory corruption in Firefox
Memory corruption in Firefox on ARM64 allows attackers to cause a crash or potentially execute arbitrary code via crafted JavaScript objects.
- 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-2020-12417?
CVE-2020-12417 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 9 Jul 2020. 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
Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
Which versions are affected by CVE-2020-12417?
It affects 5 products.
Products include Canonical Ubuntu Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Opensuse Leap.
How do I fix CVE-2020-12417?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-12417 being exploited?
There is no known exploitation of CVE-2020-12417 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-12417, GHSA-h4ph-w5wh-mj4j, UBUNTU-CVE-2020-12417.