Vulnerability identifier: #VU608

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-5280

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Oracle Linux
Operating systems & Components / Operating system

Vendor: Mozilla

Oracle

Description
The vulnerability may lead to arbitrary code execution on the target system.
The weakness exists during changing text direction. A use-after-free memory error in mozilla::nsTextNodeDirectionalityMap::RemoveElementFromMap() allows attackers to execute arbitrary code.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation
Update to 49.0.

Vulnerable software versions

Mozilla Firefox: 3.5 - 48.0.2

Oracle Linux: 10 - 11.3

Oracle Linux: 5 - 7

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2016-85/
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html

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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.