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OpenBSD DNS-Server PRNG Transaktion-ID Sicherheitslücke Advisory Available in English 

Secunia Advisory: SA28819  
Herausgegeben: 2008-02-07
Last Update: 2008-03-14

Gefahrenstufe:
Mittelgradig kritisch
Auswirkung: Spoofing
Von Wo: Aus dem Internet
Lösungsstatus: Hersteller-Workaround

OS:OpenBSD 3.x
OpenBSD 4.0
OpenBSD 4.1
OpenBSD 4.2


CVE reference:CVE-2008-1146 (Secunia mirror)
CVE-2008-1147 (Secunia mirror)
CVE-2008-1148 (Secunia mirror)



Beschreibung:
Amit Klein hat eine Sicherheitslücke in OpenBSD gemeldet, die böswillige Personen ausnutzen können, um den DNS-Cache zu verunreinigen.

Die Sicherheitslücke wird durch eine Schwachstelle in dem Pseudo Random Number Generator (PRNG) des DNS-Servers von OpenBSD verursacht. Dies kann ausgenutzt werden, um die DNS-Transaktion-ID zu erlangen und den DNS-Cache zu verunreinigen.

Die Sicherheitslücke ist in OpenBSD Versionen 3.3 bis 4.2 gemeldet.

Lösung:
Verlassen Sie sich nicht auf Informationen eines OpenBSD DNS-Servers.

In dem CVS-Repository behoben.
http://www.openbsd.org/cgi-bin/cvsweb...amp;content-type=text/x-cvsweb-markup

Gemeldet und/oder entdeckt von:
Amit Klein, Trusteer

Änderungen:
2008-03-11: CVE-Referenz hinzugefügt.
2008-03-14: "Lösung" aktualisiert.

Original Advisory:
http://www.trusteer.com/docs/dnsopenbsd.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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