PHP 'tempnam()' 'safe_mode' Restriction-Bypass Vulnerability

BID:36555

Info

PHP 'tempnam()' 'safe_mode' Restriction-Bypass Vulnerability

Bugtraq ID: 36555
Class: Design Error
CVE: CVE-2009-3557
Remote: No
Local: Yes
Published: Sep 30 2009 12:00AM
Updated: Jun 17 2010 06:49PM
Credit: Grzegorz Stachowiak from SecurityReason
Vulnerable: Ubuntu Ubuntu Linux 9.10 sparc
Ubuntu Ubuntu Linux 9.10 powerpc
Ubuntu Ubuntu Linux 9.10 lpia
Ubuntu Ubuntu Linux 9.10 i386
Ubuntu Ubuntu Linux 9.10 amd64
Ubuntu Ubuntu Linux 9.04 sparc
Ubuntu Ubuntu Linux 9.04 powerpc
Ubuntu Ubuntu Linux 9.04 lpia
Ubuntu Ubuntu Linux 9.04 i386
Ubuntu Ubuntu Linux 9.04 amd64
Ubuntu Ubuntu Linux 8.10 sparc
Ubuntu Ubuntu Linux 8.10 powerpc
Ubuntu Ubuntu Linux 8.10 lpia
Ubuntu Ubuntu Linux 8.10 i386
Ubuntu Ubuntu Linux 8.10 amd64
Ubuntu Ubuntu Linux 8.04 LTS sparc
Ubuntu Ubuntu Linux 8.04 LTS powerpc
Ubuntu Ubuntu Linux 8.04 LTS lpia
Ubuntu Ubuntu Linux 8.04 LTS i386
Ubuntu Ubuntu Linux 8.04 LTS amd64
Ubuntu Ubuntu Linux 6.06 LTS sparc
Ubuntu Ubuntu Linux 6.06 LTS powerpc
Ubuntu Ubuntu Linux 6.06 LTS i386
Ubuntu Ubuntu Linux 6.06 LTS amd64
Slackware Linux x86_64 -current
Slackware Linux 13.0 x86_64
Slackware Linux 13.0
Slackware Linux 12.2
Slackware Linux 12.1
Slackware Linux 12.0
Slackware Linux 11.0
Slackware Linux -current
PHP PHP 5.3
PHP PHP 5.2.11
Mandriva Linux Mandrake 2010.0 x86_64
Mandriva Linux Mandrake 2010.0
Mandriva Linux Mandrake 2009.1 x86_64
Mandriva Linux Mandrake 2009.1
Mandriva Linux Mandrake 2008.0 x86_64
Mandriva Linux Mandrake 2008.0
HP HP-UX Web Server Suite 3.10
HP HP-UX Web Server Suite 2.31
HP HP-UX B.11.31
HP HP-UX B.11.23
HP HP-UX B.11.11
Gentoo Linux
Apple Mac OS X Server 10.6.2
Apple Mac OS X Server 10.6.1
Apple Mac OS X Server 10.6
Apple Mac OS X 10.6.2
Apple Mac OS X 10.6.1
Apple Mac OS X 10.6
Not Vulnerable: PHP PHP 5.3.1
PHP PHP 5.2.12
Apple Mac OS X Server 10.6.3
Apple Mac OS X 10.6.3

Discussion

PHP 'tempnam()' 'safe_mode' Restriction-Bypass Vulnerability

PHP is prone to a 'safe_mode' restriction-bypass vulnerability. Successful exploits could allow an attacker to access files in unauthorized locations or create files in any writable directory.

This vulnerability would be an issue in shared-hosting configurations where multiple users can create and execute arbitrary PHP script code; the 'safe_mode' restrictions are assumed to isolate users from each other.

PHP 5.2.11 and 5.3.0 are vulnerable; other versions may also be affected.

Exploit / POC

PHP 'tempnam()' 'safe_mode' Restriction-Bypass Vulnerability

To exploit this issue, an attacker can use readily available tools.

Solution / Fix

PHP 'tempnam()' 'safe_mode' Restriction-Bypass Vulnerability

Solution:
Updates are available. Please see the references for more information.


Ubuntu Ubuntu Linux 9.10 sparc

Slackware Linux x86_64 -current

Slackware Linux 12.0

Mandriva Linux Mandrake 2009.1 x86_64

Slackware Linux -current

Ubuntu Ubuntu Linux 8.04 LTS powerpc

Ubuntu Ubuntu Linux 8.10 powerpc

Ubuntu Ubuntu Linux 8.04 LTS sparc

Ubuntu Ubuntu Linux 8.10 i386

Apple Mac OS X Server 10.6

Slackware Linux 12.2

Ubuntu Ubuntu Linux 9.10 powerpc

Ubuntu Ubuntu Linux 6.06 LTS sparc

Mandriva Linux Mandrake 2008.0 x86_64

Ubuntu Ubuntu Linux 6.06 LTS powerpc

Ubuntu Ubuntu Linux 8.04 LTS amd64

Mandriva Linux Mandrake 2008.0

Ubuntu Ubuntu Linux 9.10 lpia

Ubuntu Ubuntu Linux 9.04 sparc

Mandriva Linux Mandrake 2010.0

Ubuntu Ubuntu Linux 8.04 LTS lpia

Ubuntu Ubuntu Linux 9.04 powerpc

Ubuntu Ubuntu Linux 6.06 LTS i386

Ubuntu Ubuntu Linux 8.10 lpia

Slackware Linux 13.0 x86_64

Mandriva Linux Mandrake 2010.0 x86_64

Ubuntu Ubuntu Linux 6.06 LTS amd64

Slackware Linux 12.1

Ubuntu Ubuntu Linux 9.04 i386

Ubuntu Ubuntu Linux 9.04 lpia

Ubuntu Ubuntu Linux 8.10 sparc

Ubuntu Ubuntu Linux 9.10 i386

Slackware Linux 13.0

Ubuntu Ubuntu Linux 9.10 amd64

Apple Mac OS X 10.6

Ubuntu Ubuntu Linux 8.04 LTS i386

Ubuntu Ubuntu Linux 9.04 amd64

Slackware Linux 11.0

Mandriva Linux Mandrake 2009.1

Ubuntu Ubuntu Linux 8.10 amd64

Apple Mac OS X 10.6.1

Apple Mac OS X Server 10.6.1

Apple Mac OS X Server 10.6.2

Apple Mac OS X 10.6.2

References

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