CVE-2017-5389 Security feature bypass in Firefox
Malicious WebExtensions can bypass security controls to install additional extensions without user permission by manipulating CSP headers and script loads.
- 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-2017-5389?
CVE-2017-5389 is a medium-severity vulnerability in Mozilla Firefox, published on 11 Jun 2018. 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
WebExtensions could use the "mozAddonManager" API by modifying the CSP headers on sites with the appropriate permissions and then using host requests to redirect script loads to a malicious site. This allows a malicious extension to then install additional extensions without explicit user permission. This vulnerability affects Firefox < 51.
Weakness: CWE-601
Which versions are affected by CVE-2017-5389?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2017-5389?
Upgrade to a fixed version.
Is CVE-2017-5389 being exploited?
There is no known exploitation of CVE-2017-5389 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-xmc5-26p9-v4x6, UBUNTU-CVE-2017-5389.