Vulnerability identifier: #VU19059

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-8664

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
watchOS
Operating systems & Components / Operating system
Apple iOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an issue with a "IMBalloonPluginDataSource individualPreviewSummary" method in IMCore, which can throw an NSException. A remote attacker can send a specially crafted IMessage to cause a denial of service condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

watchOS: 2.0 - 5.1.3

Apple iOS: 12.1 16B92 - 12.1.4 16D57, 12.0 16A366 - 12.0.1 16A404, 11.4 - 11.4.1, 11.3 - 11.3.1, 11.1 - 11.1.2, 4.2 - 4.2.10, 4.3 - 4.3.5, 5.0.1, 5.1 - 5.1.1, 6.0.1 - 6.0.2, 6.1 - 6.1.6, 7.0.1 - 7.0.6, 7.1 - 7.1.2, 8.1 - 8.1.3, 8.4 - 8.4.1, 9.1 - 9.1.0, 9.3 - 9.3.5, 6.3.1, 11.2 - 11.2.6, 10.0 - 10.0.3, 11.0.0 - 11.0.3, 10.3 - 10.3.3, 10.2 - 10.2.1, 10.1 - 10.1.1, 4.0 - 4.0.2, 3.2 - 3.2.2, 3.1 - 3.1.3, 3.0 - 3.0.1, 9.2 - 9.2.1, 9.0.0 - 9.0.2

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External links
http://packetstormsecurity.com/files/download/153531/GS20190704143402.tgz
http://threatpost.com/apple-patches-imessage-bug/146277/

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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.