CVE-2019-11728 Information disclosure in Firefox
A malicious site can scan TCP ports on a user's host via the Alt-Svc header, exposing network topology information.
- 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-2019-11728?
CVE-2019-11728 is a medium-severity vulnerability in Mozilla Firefox, published on 23 Jul 2019. 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
The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded. This vulnerability affects Firefox < 68.
Weakness: CWE-668
Which versions are affected by CVE-2019-11728?
It affects 2 products.
Products include Mozilla Firefox, Opensuse Leap.
How do I fix CVE-2019-11728?
Upgrade to a fixed version.
Is CVE-2019-11728 being exploited?
There is no known exploitation of CVE-2019-11728 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-64hw-6p83-m326, UBUNTU-CVE-2019-11728.