Vulnerability identifier: #VU6716

Vulnerability risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-2522

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to bad bounds checking in NSCharacterSet coding for NSKeyedUnarchiver when processing malicious data. A remote attacker can send a specially crafted NSArchiver object, trick the victim into opening it, trigger buffer overflow in the CoreFoundation component and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in full system compromise.

Mitigation
Update to version 10.12.5.

Vulnerable software versions

macOS: 10.12.4 16E195, 10.10.5, 10.11.6

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External links
http://support.apple.com/en-us/HT207797

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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. However, proof of concept for this vulnerability is available.