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TITLE:
OpenTTD Format String and Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA16696

VERIFY ADVISORY:
http://secunia.com/advisories/16696/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
OpenTTD 0.x
http://secunia.com/product/5664/

DESCRIPTION:
Alexey Dobriyan has reported some vulnerabilities in OpenTTD, which
can be exploited by malicious people to cause a DoS (Denial of
Service) or potentially compromise a vulnerable system.

1) Some format string error in the handling of network text messages
in network_server.c, network.c, console_cmds.c, and network_client.c
can be exploited to crash the OpenTTD server or client and
potentially to execute arbitrary code.

2) Some boundary errors due to the unsafe use of "vsprintf()" may be
exploited to cause a DoS and potentially to execute arbitrary code.

The vulnerabilities have been reported in version 0.4.0.1. Other
versions may also be affected.

SOLUTION:
Some of the vulnerabilities have been fixed in the CVS repositories.
http://svn.openttd.org/cgi-bin/viewcvs.cgi?rev=2899&view=rev

Play network games on trusted networks only.

PROVIDED AND/OR DISCOVERED BY:
Alexey Dobriyan

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About:
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