Linux kernel cpuset_tasks_read function information disclosure

kernel-cpusettasksread-info-disclosure (34779) The risk level is classified as LowLow Risk

Description:

Linux kernel could allow a local attacker to obtain sensitive information, caused by an underflow error in the cpuset_tasks_read function. A local attacker could exploit this vulnerability to read kernel memory and obtain sensitive information.

*CVSS:

Base Score: 2.5
  Access Vector: Local
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 1.8
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Obtain Information

Remedy:

Upgrade to the latest version of the Linux kernel (2.6.20.13 or 2.6.21.4 or later), available from the Linux Kernel Web site. See References.

For Ubuntu Linux (linux-source):
Refer to USN-489-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux (kernel):
Refer to MDKSA-2007:171 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux (linux-source):
Refer to USN-510-1 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux (linux):
Refer to DSA-1363-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (kernel):
Refer to RHSA-2007:0705-2 for patch, upgrade, or suggested workaround information. See References.

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

References:

  • iDefense Labs PUBLIC ADVISORY: 06.07.07: Linux Kernel cpuset tasks Information Disclosure Vulnerability.
  • The Linux Kernel Archives: ChangeLog-2.6.21.4.
  • BID-24389: Linux Kernel CPUSet Tasks Memory Leak Information Disclosure Vulnerability
  • CVE-2007-2875: Integer underflow in the cpuset_tasks_read function in the Linux kernel before 2.6.20.13, and 2.6.21.x before 2.6.21.4, when the cpuset filesystem is mounted, allows local users to obtain kernel memory contents by using a large offset when reading the /dev/cpuset/tasks file.
  • DSA-1363: linux-2.6 -- several vulnerabilities
  • MDKSA-2007:171: Updated kernel packages fix multiple vulnerabilities and bugs
  • MDKSA-2007:196: Updated kernel packages fix multiple vulnerabilities and bugs
  • OSVDB ID: 37113: Linux Kernel cpuset_tasks_read Function Local Underflow
  • RHSA-2007-0705: Important: kernel security update
  • SA25594: Linux Kernel Multiple Vulnerabilities
  • SECTRACK ID: 1018211: Linux Kernel cpuset_tasks_read() Memory Disclosure Lets Local Users View Portions of Kernel Memory
  • SUSE-SA:2007:053: Linux kernel privilege escalation
  • USN-486-1: Linux kernel vulnerabilities
  • USN-489-1: Linux kernel vulnerabilities
  • USN-510-1: Linux kernel vulnerabilities
  • VUPEN/ADV-2007-2105: Linux Kernel Multiple Remote Denial of Service and Information Disclosure Vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Debian Debian Linux 4.0
  • Linux Linux Kernel 2.6.20
  • Linux Linux Kernel 2.6.20.1
  • Linux Linux Kernel 2.6.20.10
  • Linux Linux Kernel 2.6.20.11
  • Linux Linux Kernel 2.6.20.12
  • Linux Linux Kernel 2.6.20.13
  • Linux Linux Kernel 2.6.20.14
  • Linux Linux Kernel 2.6.20.2
  • Linux Linux Kernel 2.6.20.3
  • Linux Linux Kernel 2.6.20.4
  • Linux Linux Kernel 2.6.20.5
  • Linux Linux Kernel 2.6.20.6
  • Linux Linux Kernel 2.6.20.7
  • Linux Linux Kernel 2.6.20.8
  • Linux Linux Kernel 2.6.20.9
  • Linux Linux Kernel 2.6.21
  • Linux Linux Kernel 2.6.21.1
  • Linux Linux Kernel 2.6.21.2
  • Linux Linux Kernel 2.6.21.3
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0 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 Open Enterprise Server
  • Novell OpenSUSE 10.2
  • Novell OpenSUSE 10.3
  • Novell SLE SDK 10
  • Novell SLE SDK 10 SP1
  • Novell SUSE Linux Enterprise 10 SP1 DEBUGINFO
  • Novell SUSE Linux Enterprise Desktop 10 SP1
  • Novell SUSE Linux Enterprise Server 10
  • Novell SUSE Linux Enterprise Server 10 SP1
  • Novell UnitedLinux 1.0
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5
  • SuSE Linux Enterprise Server 9
  • SUSE SuSE Linux
  • SuSE SuSE Linux Retail Solution 8
  • SuSE SuSE SLES 9

Reported:

Jun 07, 2007

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