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Cisco IOS regulære udtryk Denial of Service Advisory Available in English  Advisory Available in German 

Secunia Advisory: SA26798  
Udsendt: 2007-09-13

Kritisk:
Ikke kritisk
Betydning: DoS
Hvor: Lokalt System
Løsning Status: Ikke Patchet

OS:Cisco IOS 12.x
Cisco IOS R12.x


This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released!


Beskrivelse:
Der er rapporteret en sårbarhed i Cisco IOS, som kan udnyttes af ondsindede, lokale brugere til at udføre et DoS (Denial of Service).

Sårbarheden skyldes en fejl under håndteringen af regulære udtryk indeholdende "repetition operators" og "pattern recalls". Dette kan udnyttes til at forårsage et stack overflow via en kommando med specielt udformede regulære udtryk på CLI-interfacet.

Succesfuld udnyttelse crasher enheden og forudsætter en genstart.

Sårbarheden er rapporteret i version 12.0, 12.1, 12.2, 12.3 og 12.4.

Løsning:
Begræns adgang til brugere, der haves tillid til.

Rapporteret af / Kredit:
Sebastian Wiesinger

Original Advisory:
http://www.cisco.com/en/US/products/p...ecurity_response09186a00808bb91c.html

Andre Kilder:
https://puck.nether.net/pipermail/cisco-nsp/2007-August/043002.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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