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Zdaemon Denial of Service and Buffer Overflow Vulnerabilities
Secunia Advisory: SA19496
Release Date: 2006-04-03
Last Update: 2006-04-06
Popularity: 4,917 views

Critical:
Highly critical
Impact: DoS
System access
Where: From remote
Solution Status: Unpatched

Software:ZDaemon 1.x

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CVE reference:CVE-2006-1592
CVE-2006-1593


Description:
Luigi Auriemma has reported two vulnerabilities in Zdaemon, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.

1) A boundary error in the checking of client maps (.wad files) when a client connects can be exploited to cause a buffer overflow by passing an overly long string (more than 256 bytes) as the filename of a map.

Successful exploitation requires knowledge of the password if the server is password protected.

2) Out-of-bounds memory access errors in the "ZD_MissingPlayer()", "ZD_UseItem()", and "ZD_ValidClient()" functions can be exploited to crash the server by supplying an invalid value.

Successful exploitation requires access to a match on a vulnerable server.

The vulnerabilities have been reported in version 1.08.01. Other versions may also be affected.

Solution:
Grant only trusted clients access to matches by password protecting vulnerable game servers.

Provided and/or discovered by:
Luigi Auriemma

Changelog:
2006-04-06: Added CVE references.

Original Advisory:
http://aluigi.altervista.org/adv/zdaebof-adv.txt


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