Vulnerability identifier: #VU15971

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-2018-16470

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rack
Web applications / Modules and components for CMS

Vendor: Rack

Description

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

The vulnerability exists due to resource exhaustion condition in the multipart parser when processing malicious input. A remote attacker can send a custom request, cause the parser to use an excessive amount of CPU resources and cause the service to crash.

Mitigation
Update to version 2.0.6.

Vulnerable software versions

Rack: 2.0.4 - 2.0.5

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External links
http://groups.google.com/forum/#!msg/rubyonrails-security/U_x-YkfuVTg/xhvYAmp6AAAJ

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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.