#VU11303 Improper input validation in CUPS - CVE-2017-18248

Vulnerability identifier: #VU11303

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-18248

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CUPS
Server applications / Other server solutions

Vendor: Apple Inc.

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

The weakness exists in the add_job function due to insufficient validation of usernames. A remote attacker can send print jobs with an invalid username and cause the service to crash.

Mitigation
Update to version 2.2.6.

Vulnerable software versions

CUPS: 1.0.4 - 2.2.5

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External links
https://github.com/apple/cups/issues/5143

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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.