CVE-2015-2731

Description

Use-after-free vulnerability in the CSPService::ShouldLoad function in the microtask implementation in Mozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 allows remote attackers to execute arbitrary code by leveraging client-side JavaScript that triggers removal of a DOM object on the basis of a Content Policy.

10.0

CVSS

Severity: Critical

CVSS 2.0 •

EPSS 2.30% Top 20%

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

Affected: n/a n/a

References

Link	Tags
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html	vendor advisory
http://rhn.redhat.com/errata/RHSA-2015-1455.html	vendor advisory
https://security.gentoo.org/glsa/201512-10	vendor advisory
http://www.securityfocus.com/bid/75541	vdb entry
http://www.mozilla.org/security/announce/2015/mfsa2015-63.html	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1149891	issue tracking
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html	third party advisory
http://www.securitytracker.com/id/1032784	vdb entry
http://rhn.redhat.com/errata/RHSA-2015-1207.html	vendor advisory
http://www.ubuntu.com/usn/USN-2656-1	vendor advisory
http://www.securitytracker.com/id/1032783	vdb entry
http://www.debian.org/security/2015/dsa-3300	vendor advisory
http://www.ubuntu.com/usn/USN-2656-2	vendor advisory
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html	third party advisory

Frequently Asked Questions

What is the severity of CVE-2015-2731?: CVE-2015-2731 has been scored as a critical severity vulnerability.
How to fix CVE-2015-2731?: To fix CVE-2015-2731, 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-2015-2731 being actively exploited in the wild?: It is possible that CVE-2015-2731 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.