CVE-2017-5386

Public Exploit

Description

WebExtension scripts can use the "data:" protocol to affect pages loaded by other web extensions using this protocol, leading to potential data disclosure or privilege escalation in affected extensions. This vulnerability affects Firefox ESR < 45.7 and Firefox < 51.

7.3

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 1.18% Top 25%

Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox ESR

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2017-02/	vendor advisory
https://security.gentoo.org/glsa/201702-22	third party advisory vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1319070	issue tracking patch vendor advisory exploit
https://www.debian.org/security/2017/dsa-3771	third party advisory vendor advisory
http://www.securitytracker.com/id/1037693	vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2017-01/	vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0190.html	third party advisory vendor advisory
http://www.securityfocus.com/bid/95769	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-5386?: CVE-2017-5386 has been scored as a high severity vulnerability.
How to fix CVE-2017-5386?: To fix CVE-2017-5386, 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-2017-5386 being actively exploited in the wild?: It is possible that CVE-2017-5386 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5386?: CVE-2017-5386 affects Mozilla Firefox ESR, Mozilla Firefox.

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