PHP Multiple Safe_Mode and Open_Basedir Restriction Bypass Vulnerabilities

BID:17439

Info

PHP Multiple Safe_Mode and Open_Basedir Restriction Bypass Vulnerabilities

Bugtraq ID: 17439
Class: Input Validation Error
CVE: CVE-2006-1608
CVE-2006-1494
Remote: No
Local: Yes
Published: Apr 10 2006 12:00AM
Updated: Jan 25 2007 04:19PM
Credit: Maksymilian Arciemowicz discovered these issues.
Vulnerable: Ubuntu Ubuntu Linux 5.10 sparc
Ubuntu Ubuntu Linux 5.10 powerpc
Ubuntu Ubuntu Linux 5.10 i386
Ubuntu Ubuntu Linux 5.10 amd64
Ubuntu Ubuntu Linux 5.0 4 powerpc
Ubuntu Ubuntu Linux 5.0 4 i386
Ubuntu Ubuntu Linux 5.0 4 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
Turbolinux Turbolinux Server 10.0 x86
Turbolinux Turbolinux Server 10.0
Turbolinux Turbolinux Desktop 10.0
Turbolinux Turbolinux 10 F...
TurboLinux Personal
TurboLinux Multimedia
Turbolinux Home
Turbolinux Appliance Server Workgroup Edition 1.0
Turbolinux Appliance Server Hosting Edition 1.0
Turbolinux Appliance Server 1.0 Workgroup Edition
Turbolinux Appliance Server 1.0 Hosting Edition
Turbolinux Appliance Server 2.0
Trend Micro InterScan VirusWall 8.0
TransSoft Broker FTP Server 8.0
TransSoft Broker FTP Server 7.0
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE Linux Enterprise Server 9
SGI ProPack 3.0 SP6
S.u.S.E. UnitedLinux 1.0
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 10.0
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 9.2 x86_64
S.u.S.E. Linux Professional 9.2
S.u.S.E. Linux Professional 9.1 x86_64
S.u.S.E. Linux Professional 9.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
S.u.S.E. Linux Personal 9.1 x86_64
S.u.S.E. Linux Personal 9.1
S.u.S.E. Linux Enterprise Server for S/390 9.0
S.u.S.E. Linux Enterprise Server for S/390
Redhat Stronghold 4.0
Redhat Enterprise Linux WS 4
Redhat Enterprise Linux WS 3
Redhat Enterprise Linux WS 2.1 IA64
Redhat Enterprise Linux WS 2.1
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux ES 2.1 IA64
Redhat Enterprise Linux ES 2.1
Redhat Enterprise Linux AS 4
Redhat Enterprise Linux AS 3
Redhat Enterprise Linux AS 2.1 IA64
Redhat Enterprise Linux AS 2.1
Redhat Desktop 4.0
Redhat Desktop 3.0
Redhat Advanced Workstation for the Itanium Processor 2.1 IA64
Redhat Advanced Workstation for the Itanium Processor 2.1
PHP PHP 5.1.3 -RC1
PHP PHP 5.1.2
PHP PHP 5.1.1
PHP PHP 5.1
PHP PHP 5.0.5
PHP PHP 5.0.4
PHP PHP 5.0.3
PHP PHP 5.0.2
PHP PHP 5.0.1
PHP PHP 5.0 candidate 3
PHP PHP 5.0 candidate 2
PHP PHP 5.0 candidate 1
PHP PHP 5.0 .0
PHP PHP 4.4.2
PHP PHP 4.4.1
PHP PHP 4.4 .0
PHP PHP 4.3.11
PHP PHP 4.3.10
+ Gentoo Linux
+ Redhat Fedora Core3
 + Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
+ Trustix Secure Linux 1.5
PHP PHP 4.3.9
PHP PHP 4.3.8
+ Mandriva Linux Mandrake 10.1 x86_64
 + Mandriva Linux Mandrake 10.1
+ S.u.S.E. Linux Personal 9.2
+ Turbolinux Turbolinux Server 10.0
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 PHP PHP 4.3.7
PHP PHP 4.3.6
PHP PHP 4.3.5
PHP PHP 4.3.4
+ MandrakeSoft Corporate Server 3.0 x86_64
 + MandrakeSoft Corporate Server 3.0
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ S.u.S.E. Linux Personal 9.1
PHP PHP 4.3.3
+ S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ Turbolinux Home
+ Turbolinux Turbolinux 10 F...
 + Turbolinux Turbolinux Desktop 10.0
PHP PHP 4.3.2
PHP PHP 4.3.1
PHP PHP 4.3
PHP PHP 4.2.3
+ EnGarde Secure Linux 1.0.1
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.0
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
PHP PHP 4.2.2
PHP PHP 4.2.1
- FreeBSD FreeBSD 4.6
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.3
+ Slackware Linux 8.1
PHP PHP 4.2 .0
PHP PHP 4.2 -dev
PHP PHP 4.1.2
+ Apple Mac OS X 10.1.5
+ Apple Mac OS X 10.1.4
+ Apple Mac OS X 10.1.3
+ Apple Mac OS X 10.1.2
+ Apple Mac OS X 10.1.1
+ Apple Mac OS X 10.1
+ Apple Mac OS X 10.1
+ Apple Mac OS X 10.0.4
+ Apple Mac OS X 10.0.3
+ Apple Mac OS X 10.0.2
+ Apple Mac OS X 10.0.1
+ Apple Mac OS X 10.0
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + MandrakeSoft Multi Network Firewall 2.0
+ MandrakeSoft Single Network Firewall 7.2
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
PHP PHP 4.1.1
PHP PHP 4.1 .0
+ SuSE Linux 8.0 i386
 + SuSE Linux 8.0
PHP PHP 4.0.7 RC3
PHP PHP 4.0.7 RC2
PHP PHP 4.0.7 RC1
PHP PHP 4.0.7
PHP PHP 4.0.6
PHP PHP 4.0.5
PHP PHP 4.0.4
PHP PHP 4.0.3 pl1
+ SuSE Linux 6.4 ppc
 + SuSE Linux 6.4 i386
 + SuSE Linux 6.4 alpha
 + SuSE Linux 6.4
PHP PHP 4.0.3
+ Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 IA-32
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ Sun Cobalt Control Station 4100CS
+ Sun Cobalt Qube3 Japanese 4000WGJ
+ Sun Cobalt Qube3 Japanese w/ Caching and RAID 4100WGJ
+ Sun Cobalt Qube3 Japanese w/Caching 4010WGJ
+ Sun Cobalt RaQ XTR 3500R
+ Sun Cobalt RaQ XTR Japanese 3500R-ja
PHP PHP 4.0.2
PHP PHP 4.0.1 pl2
PHP PHP 4.0.1 pl1
PHP PHP 4.0.1
+ Sun Cobalt Qube3 4000WG
+ Sun Cobalt Qube3 w/ Caching and RAID 4100WG
+ Sun Cobalt Qube3 w/Caching 4010WG
+ Sun Cobalt RaQ4 3001R
+ Sun Cobalt RaQ4 Japanese RAID 3100R-ja
+ Sun Cobalt RaQ4 RAID 3100R
PHP PHP 4.0 0
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 10.2 x86_64
Mandriva Linux Mandrake 10.2
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
Avaya S8710 R2.0.1
Avaya S8710 R2.0.0
Avaya S8700 R2.0.1
Avaya S8700 R2.0.0
Avaya S8500 R2.0.1
Avaya S8500 R2.0.0
Avaya S8300 R2.0.1
Avaya S8300 R2.0.0
Avaya Messaging Storage Server MM3.0
Avaya Messaging Storage Server
Avaya Message Networking
Avaya Intuity LX
Avaya Converged Communications Server 2.0
Not Vulnerable:

Discussion

PHP Multiple Safe_Mode and Open_Basedir Restriction Bypass Vulnerabilities

PHP is prone to multiple 'safe_mode' and 'open_basedir' restriction-bypass vulnerabilities. Successful exploits could allow an attacker to access sensitive information or to write files in unauthorized locations.

These vulnerabilities would be an issue in shared-hosting configurations where multiple users can create and execute arbitrary PHP script code, when the 'safe_mode' and 'open_basedir' restrictions are expected to isolate the users from each other.

These issues are reported to affect PHP versions 4.4.2 and 5.1.2; other versions may also be vulnerable.

Exploit / POC

PHP Multiple Safe_Mode and Open_Basedir Restriction Bypass Vulnerabilities

Attackers may exploit these issues with standard PHP code.

An example statement exploiting the 'copy()' issue is available:

copy("compress.zlib:///etc/passwd", "/home/<username>/passwd.txt");



An example statement exploiting the 'tempnam()' issue is available:

tempnam("path_from_open_basedir", "../../../../../../../../Open_basedir_bypasswd");


The following exploit is available:

Solution / Fix

PHP Multiple Safe_Mode and Open_Basedir Restriction Bypass Vulnerabilities

Solution:
Fixes for these issues are available in PHP's CVS repository.

Please see the referenced vendor advisories for more information.


S.u.S.E. Linux Professional 10.0

PHP PHP 4.1.2

PHP PHP 4.2.3

PHP PHP 4.3.10

PHP PHP 4.3.3

PHP PHP 4.3.4

PHP PHP 4.3.8

PHP PHP 5.0.4

S.u.S.E. Linux Professional 9.2

S.u.S.E. Linux Professional 9.3

References

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