OpenTTD before 1.1.5 contains a Denial of Service (slow read attack) that prevents users from joining the server.

Two denial of service vulnerabilities have been discovered in the server component of OpenTTD, a free reimplementation of Transport Tycoon Deluxe.

Fixes CVE-2012-0049 openttd: denial of service via slow read attack

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The OpenTTD Team reports :

Using a slow read type attack it is possible to prevent anyone from joining a server with virtually no resources. Once downloading the map no other downloads of the map can start, so downloading really slowly will prevent others from joining. This can be further aggravated by the pause-on-join setting in which case the game is paused and the players cannot continue the game during such an attack. This attack requires that the user is not banned and passes the authorization to the server, although for many servers there is no server password and thus authorization is easy.

ID	Name	Product	Family	Severity
61440	Debian DSA-2524-1 : openttd - several vulnerabilities	Nessus	Debian Local Security Checks	medium
57718	Fedora 16 : openttd-1.1.5-1.fc16 (2012-0647)	Nessus	Fedora Local Security Checks	medium
57717	Fedora 15 : openttd-1.1.5-1.fc15 (2012-0623)	Nessus	Fedora Local Security Checks	medium
57585	FreeBSD : OpenTTD -- Denial of service (server) via slow read attack (1ac858b0-3fae-11e1-a127-0013d3ccd9df)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2012-0049

medium

Tenable Plugins

medium

medium

medium

medium