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TITLE:
S.T.A.L.K.E.R.: Shadow of Chernobyl Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA30891

VERIFY ADVISORY:
http://secunia.com/advisories/30891/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
S.T.A.L.K.E.R.: Shadow of Chernobyl 1.x
http://secunia.com/product/19116/

DESCRIPTION:
Luigi Auriemma has reported some vulnerabilities in S.T.A.L.K.E.R.:
Shadow of Chernobyl, which can be exploited by malicious people to
cause a DoS (Denial of Service) or compromise a vulnerable system.

1) A boundary error within MultipacketReciever::RecievePacket() can
be exploited to cause a stack-based buffer overflow via a specially
crafted packet with 0x39 as the first byte.

Successful exploitation allows execution of arbitrary code.

2) An input validation error within NET_Compressor::Decompress() can
be exploited to cause a buffer overflow via a specially crafted
packet containing the byte 0xc1.

3) An error within MultipacketReciever::RecievePacket() can be
exploited to cause the server to terminate via a specially crafted
packet.

The vulnerabilities are reported in version 1.0006. Other versions
may also be affected.

SOLUTION:
Use in trusted network environments only.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/stalker39x-adv.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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