Ubuntu Security Notice 7036-1 - 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.
c4acd1ffc8ca871047fb8a39618d9c0b95465770474d22abee717b0b2de788adDebian Linux Security Advisory 5530-1 - Several vulnerabilities were discovered in ruby-rack, a modular Ruby webserver interface, which may result in denial of service and shell escape sequence injection.
1d720695b79a166118349cbe5f4050069000900a5d5b9d9439ed4da692cb559fUbuntu Security Notice 5910-1 - It was discovered that Rack did not properly structure regular expressions in some of its parsing components, which could result in uncontrolled resource consumption if an application using Rack received specially crafted input. A remote attacker could possibly use this issue to cause a denial of service. It was discovered that Rack did not properly structure regular expressions in its multipart parsing component, which could result in uncontrolled resource consumption if an application using Rack to parse multipart posts received specially crafted input. A remote attacker could possibly use this issue to cause a denial of service. This issue was only fixed in Ubuntu 20.04 ESM and Ubuntu 22.04 ESM.
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