PHP tempnam() open_basedir directory traversal

php-tempnam-directory-traversal (25705) The risk level is classified as MediumMedium Risk

Description:

PHP could allow a remote attacker to traverse directories on the system, caused by improper validation of user-supplied input by the tempnam() function. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to an affected script to bypass open_basedir restrictions and create or overwrite arbitrary files on the system.

Platforms Affected:

  • Canonical, Ubuntu 5.04
  • Canonical, Ubuntu 5.10
  • Canonical, Ubuntu 6.06 LTS
  • Novell, UnitedLinux 1.0
  • PHP, PHP 4.0 Beta 4 Patch1
  • PHP, PHP 4.0 Beta1
  • PHP, PHP 4.0 Beta2
  • PHP, PHP 4.0 Beta3
  • PHP, PHP 4.0 Beta4
  • PHP, PHP 4.0 RC1
  • PHP, PHP 4.0 RC2
  • PHP, PHP 4.0.0
  • PHP, PHP 4.0.1
  • PHP, PHP 4.0.2
  • PHP, PHP 4.0.3
  • PHP, PHP 4.0.4
  • PHP, PHP 4.0.5
  • PHP, PHP 4.0.6
  • PHP, PHP 4.0.7
  • PHP, PHP 4.1.0
  • PHP, PHP 4.1.1
  • PHP, PHP 4.1.2
  • PHP, PHP 4.1.3
  • PHP, PHP 4.2.0
  • PHP, PHP 4.2.1
  • PHP, PHP 4.2.2
  • PHP, PHP 4.2.3
  • PHP, PHP 4.2.4
  • PHP, PHP 4.3.0
  • PHP, PHP 4.3.1
  • PHP, PHP 4.3.10
  • PHP, PHP 4.3.11
  • PHP, PHP 4.3.2
  • PHP, PHP 4.3.3
  • PHP, PHP 4.3.4
  • PHP, PHP 4.3.5
  • PHP, PHP 4.3.6
  • PHP, PHP 4.3.7
  • PHP, PHP 4.3.8
  • PHP, PHP 4.3.9
  • PHP, PHP 4.4.0
  • PHP, PHP 4.4.1
  • PHP, PHP 4.4.2
  • PHP, PHP 5.0.0 Beta1
  • PHP, PHP 5.0.0 Beta2
  • PHP, PHP 5.0.0 RC2
  • PHP, PHP 5.0.0
  • PHP, PHP 5.0.0 Beta4
  • PHP, PHP 5.0.0 Beta3
  • PHP, PHP 5.0.0 RC3
  • PHP, PHP 5.0.0 RC1
  • PHP, PHP 5.0.1
  • PHP, PHP 5.0.2
  • PHP, PHP 5.0.3
  • PHP, PHP 5.0.4
  • PHP, PHP 5.0.5
  • PHP, PHP 5.1.0
  • PHP, PHP 5.1.1
  • PHP, PHP 5.1.2
  • RedHat, Enterprise Linux 2.1 WS
  • RedHat, Enterprise Linux 2.1 AS
  • RedHat, Enterprise Linux 2.1 ES
  • RedHat, Enterprise Linux 3 AS
  • RedHat, Enterprise Linux 3 Desktop
  • RedHat, Enterprise Linux 3 ES
  • RedHat, Enterprise Linux 3 WS
  • RedHat, Enterprise Linux 4 WS
  • RedHat, Enterprise Linux 4 AS
  • RedHat, Enterprise Linux 4 ES
  • RedHat, Enterprise Linux 4 Desktop
  • RedHat, Linux Advanced Workstation 2.1 Itanium
  • RedHat, Stronghold
  • SuSE, SuSE Linux 10.0
  • SuSE, SuSE Linux 9.1
  • SuSE, SuSE Linux 9.2
  • SuSE, SuSE Linux 9.3
  • SuSE, SuSE Linux Enterprise Server 8.0
  • SuSE, SuSE SLES 9
  • Turbolinux, Turbolinux 10 Desktop
  • Turbolinux, Turbolinux 10 F...
  • Turbolinux, Turbolinux 10 Server
  • Turbolinux, Turbolinux 10 Server x64 Ed
  • Turbolinux, Turbolinux 7 Server
  • Turbolinux, Turbolinux 8 Server
  • Turbolinux, Turbolinux 8 Workstation
  • Turbolinux, Turbolinux Home
  • Turbolinux, Turbolinux Multimedia
  • Turbolinux, Turbolinux Personal
  • Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
  • Turbolinux, Turbolinux Appliance Server 2.0

Remedy:

Upgrade to the latest version of PHP (5.1.3 or later), available from The PHP Group Web site. See References.

For Red Hat Linux:
Refer to RHSA-2006:0568-8 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux 2.1:
Refer to RHSA-2006:0567-7 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE Security Announcement SUSE-SA:2006:024 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

File Manipulation

References:

Reported:

Apr 08, 2006

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