Vulnerability identifier: #VU15613

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-4400

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
macOS
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 an error in Security component when processing a malicious input. A remote attacker can supply a specially crafted S/MIME signed message and cause the service to crash.

Mitigation
Update to version 10.14.1.

Vulnerable software versions

macOS: 10.13.6 17G66, 10.12.6 16G29, 10.14 18A391

---

External links
http://support.apple.com/en-us/HT209193

---

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.