CVE-2017-7760 Path traversal in Firefox
A local attacker can manipulate file paths in the Mozilla Windows updater to overwrite privileged files, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-7760?
CVE-2017-7760 is a high-severity path traversal vulnerability in Mozilla Firefox, published on 11 Jun 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Mozilla Windows updater modifies some files to be updated by reading the original file and applying changes to it. The location of the original file can be altered by a malicious user by passing a special path to the callback parameter through the Mozilla Maintenance Service, allowing the manipulation of files in the installation directory and privilege escalation by manipulating the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.
Weakness: CWE-417
Which versions are affected by CVE-2017-7760?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2017-7760?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2017-7760 being exploited?
There is no known exploitation of CVE-2017-7760 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-v3f8-p9hj-32cj.