Vulnerability identifier: #VU167

Vulnerability risk: High

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-4592

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apple Safari
Client/Desktop applications / Web browsers
Apple iOS
Operating systems & Components / Operating system
tvOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description
The vulnerability allows a remote attacker to cause denial of service.

The vulnerability exists due to access control error in Apple Safari. A remote unauthenticated attacker can cause denial of service bycreating a specially crafted web site that, when loaded by the target user, will consume excessive memory resources on the target system.

Successful exploitation of this vulnerability may result in denial of vulnerable system.

Mitigation
The vendor has issued a fix (9.1.2).

Vulnerable software versions

Apple Safari: 9.1 - 9.1.1

Apple iOS: 9.3.0 - 9.3.2

tvOS: 9.2 - 9.2.1

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External links
http://support.apple.com/en-us/HT206900
http://support.apple.com/cs-cz/HT206902
http://support.apple.com/cs-cz/HT206905
http://support.apple.com/cs-cz/HT206900

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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.