CVE-2019-17001 Cross-site scripting in Firefox
Attackers can bypass Content-Security-Policy restrictions to execute JavaScript via object tags, enabling cross-site scripting attacks in Firefox.
- 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-2019-17001?
CVE-2019-17001 is a medium-severity cross-site scripting vulnerability in Mozilla Firefox, published on 8 Jan 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
A Content-Security-Policy that blocks in-line scripts could be bypassed using an object tag to execute JavaScript in the protected document (cross-site scripting). This is a separate bypass from CVE-2019-17000.*Note: This flaw only affected Firefox 69 and was not present in earlier versions.*. This vulnerability affects Firefox < 70.
Weakness: CWE-79
Which versions are affected by CVE-2019-17001?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2019-17001?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2019-17001 being exploited?
There is no known exploitation of CVE-2019-17001 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-pcxf-xvjr-2qpp, UBUNTU-CVE-2019-17001.