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OpenBSD ELF ld.so Umgebungs-Bereinigung Sicherheitslücke Advisory Available in English  Advisory Available in Danish 

Secunia Advisory: SA22993  
Herausgegeben: 2006-11-20
Last Update: 2006-11-30

Gefahrenstufe:
Weniger kritisch
Auswirkung: Erweiterung von Rechten
Von Wo: Auf dem lokalen System
Lösungsstatus: Hersteller-Patch

OS:OpenBSD 3.x
OpenBSD 4.0


CVE reference:CVE-2006-6164 (Secunia mirror)

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Beschreibung:
Eine Sicherheitslücke wurde in OpenBSD gemeldet, die böswillige lokale Benutzer ausnutzen können, um erweiterte Rechte zu erlangen.

Die Sicherheitslücke wird durch die "_dl_unsetenv()" Funktion des dynamischen Laders von OpenBSD verursacht, welche die Umgebung fehlerhaft bereinigt. Dies kann ausgenutzt werden, um erweiterte Rechte zu erlangen, indem man suid "root" Programme mit speziell präparierten Umgebungsvariablen aufruft.

Lösung:
Verwenden Sie den Patch.

OpenBSD 4.0:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/common/005_ldso.patch

OpenBSD 3.9:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/016_ldso.patch

Gemeldet und/oder entdeckt von:
Von Mark Dowd, John McDonald und Justin Schuh gemeldet.

Änderungen:
2006-11-23: Weitere Informationen hinzugefügt.
2006-11-30: CVE-Referenz hinzugefügt.

Original Advisory:
http://www.openbsd.org/errata.html#ldso

http://lists.grok.org.uk/pipermail/full-disclosure/2006-November/050829.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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