CVE-2016-2821

Description

Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 2.76% Top 15%

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

Affected: n/a n/a

References

Link	Tags
http://www.securitytracker.com/id/1036057	vdb entry
http://www.mozilla.org/security/announce/2016/mfsa2016-51.html	vendor advisory
https://access.redhat.com/errata/RHSA-2016:1217	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00016.html	vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00014.html	vendor advisory
http://www.ubuntu.com/usn/USN-2993-1	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00055.html	vendor advisory
http://www.securityfocus.com/bid/91075	vdb entry
http://www.debian.org/security/2016/dsa-3600	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1271460

Frequently Asked Questions

What is the severity of CVE-2016-2821?: CVE-2016-2821 has been scored as a high severity vulnerability.
How to fix CVE-2016-2821?: To fix CVE-2016-2821, 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-2016-2821 being actively exploited in the wild?: It is possible that CVE-2016-2821 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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