Denial of service in Apple CUPS

1) Improper input validation

EUVDB-ID: #VU11303

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 - Improper input validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:apple:cups:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:apple:cups:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:cups:1.1.4:*:*:*:*:*:*:*

External links

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

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.