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PHP heltals-overflow og sikkerhedsomgåelse Advisory Available in English  Advisory Available in German 

Secunia Advisory: SA25456  
Udsendt: 2007-06-01
Sidste Opdt.: 2007-09-06

Kritisk:
Mindre kritisk
Betydning: Sikkerhedsomgåelse
Rettighedseskalering
Hvor: Lokalt System
Løsning Status: Producent Patch

Software:PHP 5.2.x

CVE reference:CVE-2007-2872 (Secunia mirror)
CVE-2007-3007 (Secunia mirror)
CVE-2007-4660 (Secunia mirror)
CVE-2007-4661 (Secunia mirror)

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Beskrivelse:
Der er rapporteret en svaghed og en sårbarhed i PHP 5, hvor sårbarheden har ukendt betydning og svagheden kan udnyttes af ondsindede, lokale brugere til at omgå visse sikkerhedsomgåelser.

1) Et heltals-overflow i funktionen "chunk_split()" kan udnyttes til at forårsage et heap-baseret buffer overflow.

Succesfuld udnyttelse kan muliggøre eksekvering af vilkårlig kode, hvilket kan resultere i omgåelse af sikkerhedsbegrænsninger som f.eks. "disable_functions" direktivet.

2) En fejl i "realpath()" funktionen gør det muligt at omgå "open_basedir" begrænsninger og derved fastslå og bestemte filer eksisterer.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.

Løsning:
Opdatér til version 5.2.4.
http://www.php.net/downloads.php

Rapporteret af / Kredit:
Producenten krediterer:
1) Gerhard Wagner
2) bugs.php.net

Forløb:
04-06-2007: Tilføjede information fra SEC Consult.
06-06-2007: Opdaterede løsningen baseret på yderligere information fra Stefan Esser.
12-06-2007: Tilføjede CVE-reference.
31-08-2007: Opdaterede løsningen.
06-09-2007: Tilføjede CVE-reference.

Original Advisory:
PHP:
http://www.php.net/releases/5_2_3.php

SEC Consult:
http://www.sec-consult.com/291.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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