CVE-2020-15667 Memory corruption in Firefox
Heap overflow in Firefox MAR update processing allows arbitrary code execution, though exploitation is restricted to Mozilla-signed updates.
- 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-2020-15667?
CVE-2020-15667 is a high-severity memory corruption vulnerability in Mozilla Firefox, published on 1 Oct 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
When processing a MAR update file, after the signature has been validated, an invalid name length could result in a heap overflow, leading to memory corruption and potentially arbitrary code execution. Within Firefox as released by Mozilla, this issue is only exploitable with the Mozilla-controlled signing key. This vulnerability affects Firefox < 80.
Weakness: CWE-787
Which versions are affected by CVE-2020-15667?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2020-15667?
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-2020-15667 being exploited?
There is no known exploitation of CVE-2020-15667 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-93j6-6353-95h4, UBUNTU-CVE-2020-15667.