Vulnerability identifier: #VU9020

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-13849

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: Apple Inc.

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to memory handling error in the CoreText component. A remote attacker can supply a specially crafted text file, trigger memory corruption and cause an unexpected application termination.

Mitigation
Update to version 11.1.

Vulnerable software versions

Apple iOS: 10.3 - 10.3.3, 10.2 - 10.2.1, 10.1 - 10.1.1, 10.0.0 - 10.0.3, 4.3.0 - 4.3.4, 4.2.1 - 4.2.8, 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, 9.3.0 - 9.3.5, 9.1.0, 9.0.0 - 9.0.2

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External links
http://support.apple.com/en-us/HT208222

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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.