CVE-2017-5390

Description

The JSON viewer in the Developer Tools uses insecure methods to create a communication channel for copying and viewing JSON or HTTP headers data, allowing for potential privilege escalation. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

9.8

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 1.35% Top 25%

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

Affected: Mozilla Thunderbird

Affected: Mozilla Firefox ESR

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2017-03/	vendor advisory
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=1297361	issue tracking patch vendor advisory
https://www.debian.org/security/2017/dsa-3832	third party advisory vendor advisory
https://security.gentoo.org/glsa/201702-13	third party advisory vendor advisory
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://rhn.redhat.com/errata/RHSA-2017-0238.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-2017-5390?: CVE-2017-5390 has been scored as a critical severity vulnerability.
How to fix CVE-2017-5390?: To fix CVE-2017-5390, 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-2017-5390 being actively exploited in the wild?: It is possible that CVE-2017-5390 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-2017-5390?: CVE-2017-5390 affects Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox.