CVE-2016-2821: Use After Free
First published: Mon Jun 13 2016(Updated: )
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.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Firefox | <=46.0.1 | |
| Firefox | =45.1.0 | |
| Firefox | =45.1.1 | |
| Debian | =8.0 | |
| SUSE Linux | =42.1 | |
| SUSE Linux | =13.1 | |
| SUSE Linux | =13.2 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =15.10 | |
| Ubuntu | =16.04 | |
| Firefox ESR | =45.1.0 | |
| Firefox ESR | =45.1.1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00055.html
- http://www.debian.org/security/2016/dsa-3600
- http://www.mozilla.org/security/announce/2016/mfsa2016-51.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/91075
- http://www.securitytracker.com/id/1036057
- http://www.ubuntu.com/usn/USN-2993-1
- https://access.redhat.com/errata/RHSA-2016:1217
- https://bugzilla.mozilla.org/show_bug.cgi?id=1271460
Frequently Asked Questions
What is the severity of CVE-2016-2821?
The severity of CVE-2016-2821 is considered high due to its potential to execute arbitrary code or cause denial of service.
How do I fix CVE-2016-2821?
To fix CVE-2016-2821, update to Mozilla Firefox version 47.0 or later, or Firefox ESR 45.2 or later.
Which versions of Firefox are affected by CVE-2016-2821?
CVE-2016-2821 affects Mozilla Firefox versions prior to 47.0 and Firefox ESR versions before 45.2.
What causes the vulnerability CVE-2016-2821?
CVE-2016-2821 is caused by a use-after-free vulnerability in the mozilla::dom::Element class when contenteditable mode is enabled.
Can CVE-2016-2821 affect web applications?
Yes, CVE-2016-2821 can affect web applications due to the ability of remote attackers to exploit the vulnerability.
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