CVE-2017-5389

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.43%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1037693 third party advisory vdb entry
https://www.mozilla.org/security/advisories/mfsa2017-01/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1308688 patch exploit vendor advisory issue tracking
http://www.securityfocus.com/bid/95763 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-5389?
CVE-2017-5389 has been scored as a medium severity vulnerability.
How to fix CVE-2017-5389?
To fix CVE-2017-5389, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5389 being actively exploited in the wild?
It is possible that CVE-2017-5389 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5389?
CVE-2017-5389 affects Mozilla Firefox.
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