Vulnerability identifier: #VU10942

Vulnerability risk: Low

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-18190

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CUPS
Server applications / Other server solutions

Vendor: Apple Inc.

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

The weakness exists in a localhost.localdomain whitelist entry in valid_host() in scheduler/client.c due to the localhost.localdomain name is often resolved via a DNS server. A remote attacker can send specially crafted POST requests to the CUPS daemon in conjunction with DNS rebinding, inject and execute arbitrary IPP commands.

Mitigation
Update to version 2.2.2.

Vulnerable software versions

CUPS: 1.0.4 - 2.2.1

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External links
http://github.com/apple/cups/commit/afa80cb2b457bf8d64f775bed307588610476c41

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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.