#VU33593 Use-after-free - CVE-2016-9899

Vulnerability identifier: #VU33593

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9899

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

Mitigation
Install update from vendor's website.

External links
https://rhn.redhat.com/errata/RHSA-2016-2946.html
https://rhn.redhat.com/errata/RHSA-2016-2973.html
https://www.securityfocus.com/bid/94885
https://www.securitytracker.com/id/1037461
https://bugzilla.mozilla.org/show_bug.cgi?id=1317409
https://security.gentoo.org/glsa/201701-15
https://www.debian.org/security/2017/dsa-3757
https://www.exploit-db.com/exploits/41042/
https://www.mozilla.org/security/advisories/mfsa2016-94/
https://www.mozilla.org/security/advisories/mfsa2016-95/
https://www.mozilla.org/security/advisories/mfsa2016-96/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.