CVE-2019-11753 Privilege escalation in Firefox
Local attackers can escalate privileges by manipulating the Firefox installer to run altered maintenance services with elevated rights.
- 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-2019-11753?
CVE-2019-11753 is a high-severity vulnerability in Mozilla Firefox, published on 27 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Firefox installer allows Firefox to be installed to a custom user writable location, leaving it unprotected from manipulation by unprivileged users or malware. If the Mozilla Maintenance Service is manipulated to update this unprotected location and the updated maintenance service in the unprotected location has been altered, the altered maintenance service can run with elevated privileges during the update process due to a lack of integrity checks. This allows for privilege escalation if the executable has been replaced locally. <br>*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69, Firefox ESR < 60.9, and Firefox ESR < 68.1.
Weakness: CWE-354
Which versions are affected by CVE-2019-11753?
It affects 2 products.
Products include Mozilla Firefox, Mozilla Firefox Esr.
How do I fix CVE-2019-11753?
Upgrade to a fixed version.
Is CVE-2019-11753 being exploited?
There is no known exploitation of CVE-2019-11753 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-8h86-hhcq-m432, UBUNTU-CVE-2019-11753.