Postfix symlink code execution

postfix-symlink-code-execution (44460) The risk level is classified as MediumMedium Risk

Description:

Postfix could allow a local attacker with write permission to the mail spool directory to execute arbitrary code on the system when a root mailbox does not exist on the system, caused by an error when handling symlink files. By creating hardlink a root-owned symlink to /var/mail, an attacker could execute arbitrary code with root privileges.

*CVSS:

Base Score: 6.9
  Access Vector: Local
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 5.1
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Privileges

Remedy:

Upgrade to the latest version of Postfix (2.5.4 Patchlevel 4 or later), available from the Postfix Web site. See References.

References:

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.04
  • Canonical Ubuntu 7.10
  • Canonical Ubuntu 8.04 LTS
  • Debian Debian Linux 4.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.1
  • MandrakeSoft Mandrake Linux 2008.1 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • Novell Linux Desktop 9
  • Novell Linux POS 9
  • Novell Open Enterprise Server
  • Novell OpenSUSE 10.2
  • Novell OpenSUSE 10.3
  • Novell OpenSUSE 11.0
  • Novell SUSE Linux Enterprise Desktop 10 SP1
  • Novell SUSE Linux Enterprise Desktop 10 SP2
  • Novell SUSE Linux Enterprise Server 10 SP1
  • Novell SUSE Linux Enterprise Server 10 SP2
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4.7.z AS
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5.2.z EUS
  • RedHat Red Hat Enterprise Linux 4.7.z ES
  • SuSE SuSE SLES 9
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux 11 Server
  • Turbolinux Turbolinux 11 Server x64 Ed
  • Wietse Venema Postfix 2.3.0
  • Wietse Venema Postfix 2.3.1
  • Wietse Venema Postfix 2.3.10
  • Wietse Venema Postfix 2.3.11
  • Wietse Venema Postfix 2.3.12
  • Wietse Venema Postfix 2.3.13
  • Wietse Venema Postfix 2.3.14
  • Wietse Venema Postfix 2.3.2
  • Wietse Venema Postfix 2.3.3
  • Wietse Venema Postfix 2.3.4
  • Wietse Venema Postfix 2.3.5
  • Wietse Venema Postfix 2.3.6
  • Wietse Venema Postfix 2.3.7
  • Wietse Venema Postfix 2.3.8
  • Wietse Venema Postfix 2.3.9
  • Wietse Venema Postfix 2.4.0
  • Wietse Venema Postfix 2.4.1
  • Wietse Venema Postfix 2.4.2
  • Wietse Venema Postfix 2.4.3
  • Wietse Venema Postfix 2.4.4
  • Wietse Venema Postfix 2.4.5
  • Wietse Venema Postfix 2.4.6
  • Wietse Venema Postfix 2.4.7
  • Wietse Venema Postfix 2.5.0
  • Wietse Venema Postfix 2.5.1
  • Wietse Venema Postfix 2.5.2
  • Wietse Venema Postfix 2.5.3
  • Wietse Venema Postfix 2.6.0
  • Wietse Venema Postfix

Reported:

Aug 14, 2008

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