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**Name of the Vulnerable Software and Affected Versions** OpenTTD versions 0.3.5 through 1.1.4 **Description** The issue allows remote attackers to cause a denial of service, resulting in a game pause, by connecting to the server and not completing either the authorization phase or the map download, which is referred to as a "slow read" attack. **Recommendations** For OpenTTD versions 0.3.5 through 1.1.4, consider implementing measures to detect and prevent slow read attacks, such as timing out incomplete connections or limiting the number of concurrent connections to prevent denial of service. At the moment, there is no information about a newer version that contains a fix for this vulnerability.