CVE-2022-44572

A flaw was found in rubygem-rack. Rack is vulnerable to a denial of service caused by a regular expression denial of service (ReDoS) flaw in the multipart parsing component. By sending a specially-crafted input, a remote attacker can cause a denial of service.

It was discovered that Rack was not properly parsing data when processing multipart POST requests. If a user or automated system were tricked into sending a specially crafted multipart POST request to an application using Rack, a remote attacker could possibly use this issue to cause a denial of service. It was discovered that Rack was not properly escaping untrusted data when performing logging operations, which could cause shell escaped sequences to be written to a terminal. If a user or automated system were tricked into sending a specially crafted request to an application using Rack, a remote attacker could possibly use this issue to execute arbitrary code in the machine running the application.