CVE-2017-5378

Public Exploit

Description

Hashed codes of JavaScript objects are shared between pages. This allows for pointer leaks because an object's address can be discovered through hash codes, and also allows for data leakage of an object's content using these hash codes. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.68% Top 20%
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 Vendor Advisory mozilla.org
Affected: Mozilla Thunderbird
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2017-03/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2017-02/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1312001 vendor advisory issue tracking exploit
https://security.gentoo.org/glsa/201702-22 third party advisory vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1330769 patch vendor advisory issue tracking
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 third party advisory vdb entry
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 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-5378?
CVE-2017-5378 has been scored as a high severity vulnerability.
How to fix CVE-2017-5378?
To fix CVE-2017-5378, 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-2017-5378 being actively exploited in the wild?
It is possible that CVE-2017-5378 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5378?
CVE-2017-5378 affects Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox.
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