Linux kernel RLIMIT_CPU security bypass

linux-kernel-rlimitcpu-security-bypass (42145) The risk level is classified as LowLow Risk

Description:

The Linux kernel could allow a local attacker to bypass security restrictions, caused by improper checking on resource limit settings. By setting RLIMIT_CPU to 0, an attacker could bypass CPU usage restrictions.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 1.8
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of the Linux kernel (2.6.22 or later), available from the Linux Kernel Archives Web site. See References.

References:

  • Debian Bug report logs - #419706: setrlimit(RLIMIT_CPUINFO) with zero value doesn't inherit properly across children.
  • The Linux Kernel Archives Web site: ChangeLog-2.6.22, Tue May 8 00:30:31 2007 -0700.
  • BID-29004: Linux Kernel RLIMIT_CPU Zero Limit Handling Local Security Bypass Vulnerability
  • CVE-2008-1294: Linux kernel 2.6.17, and other versions before 2.6.22, does not check when a user attempts to set RLIMIT_CPU to 0 until after the change is made, which allows local users to bypass intended resource limits.
  • DSA-1565: linux-2.6 -- several vulnerabilities
  • RHSA-2008-0612: Important: kernel security and bug fix update
  • SUSE-SA:2009:017: Linux kernel security update
  • USN-618-1: Linux kernel vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.04
  • Canonical Ubuntu 7.10
  • Debian Debian Linux 4.0
  • Linux Kernel 2.6.16 rc4
  • Linux Kernel 2.6.16 rc5
  • Linux Kernel 2.6.16 rc6
  • Linux Kernel 2.6.16 rc3
  • Linux Kernel 2.6.16 rc7
  • Linux Kernel 2.6.16
  • Linux Kernel 2.6.16 rc2
  • Linux Kernel 2.6.16 rc1
  • Linux Kernel 2.6.16.1
  • Linux Kernel 2.6.16.10
  • Linux Kernel 2.6.16.11
  • Linux Kernel 2.6.16.12
  • Linux Kernel 2.6.16.13
  • Linux Kernel 2.6.16.14
  • Linux Kernel 2.6.16.15
  • Linux Kernel 2.6.16.16
  • Linux Kernel 2.6.16.17
  • Linux Kernel 2.6.16.18
  • Linux Kernel 2.6.16.19
  • Linux Kernel 2.6.16.2
  • Linux Kernel 2.6.16.20
  • Linux Kernel 2.6.16.21
  • Linux Kernel 2.6.16.22
  • Linux Kernel 2.6.16.23
  • Linux Kernel 2.6.16.24
  • Linux Kernel 2.6.16.25
  • Linux Kernel 2.6.16.26
  • Linux Kernel 2.6.16.27
  • Linux Kernel 2.6.16.28
  • Linux Kernel 2.6.16.29
  • Linux Kernel 2.6.16.3
  • Linux Kernel 2.6.16.30
  • Linux Kernel 2.6.16.31
  • Linux Kernel 2.6.16.32
  • Linux Kernel 2.6.16.33
  • Linux Kernel 2.6.16.34
  • Linux Kernel 2.6.16.35
  • Linux Kernel 2.6.16.36
  • Linux Kernel 2.6.16.37
  • Linux Kernel 2.6.16.38
  • Linux Kernel 2.6.16.39
  • Linux Kernel 2.6.16.4
  • Linux Kernel 2.6.16.40
  • Linux Kernel 2.6.16.41
  • Linux Kernel 2.6.16.43
  • Linux Kernel 2.6.16.44
  • Linux Kernel 2.6.16.45
  • Linux Kernel 2.6.16.46
  • Linux Kernel 2.6.16.47
  • Linux Kernel 2.6.16.48
  • Linux Kernel 2.6.16.49
  • Linux Kernel 2.6.16.5
  • Linux Kernel 2.6.16.50
  • Linux Kernel 2.6.16.51
  • Linux Kernel 2.6.16.52
  • Linux Kernel 2.6.16.53
  • Linux Kernel 2.6.16.6
  • Linux Kernel 2.6.16.7
  • Linux Kernel 2.6.16.8
  • Linux Kernel 2.6.16.9
  • Linux Kernel 2.6.17
  • Linux Kernel 2.6.17 rc1
  • Linux Kernel 2.6.17 rc6
  • Linux Kernel 2.6.17 rc5
  • Linux Kernel 2.6.17 rc3
  • Linux Kernel 2.6.17 rc2
  • Linux Kernel 2.6.17 rc4
  • Linux Kernel 2.6.17.1
  • Linux Kernel 2.6.17.10
  • Linux Kernel 2.6.17.11
  • Linux Kernel 2.6.17.12
  • Linux Kernel 2.6.17.13
  • Linux Kernel 2.6.17.14
  • Linux Kernel 2.6.17.2
  • Linux Kernel 2.6.17.3
  • Linux Kernel 2.6.17.4
  • Linux Kernel 2.6.17.5
  • Linux Kernel 2.6.17.6
  • Linux Kernel 2.6.17.7
  • Linux Kernel 2.6.17.8
  • Linux Kernel 2.6.17.9
  • Linux Kernel 2.6.18 rc5
  • Linux Kernel 2.6.18
  • Linux Kernel 2.6.18 rc7
  • Linux Kernel 2.6.18 rc6
  • Linux Kernel 2.6.18 rc4
  • Linux Kernel 2.6.18 rc3
  • Linux Kernel 2.6.18 rc1
  • Linux Kernel 2.6.18 rc2
  • Linux Kernel 2.6.18 8.1.8.El5
  • Linux Kernel 2.6.18.1
  • Linux Kernel 2.6.18.10
  • Linux Kernel 2.6.18.11
  • Linux Kernel 2.6.18.12
  • Linux Kernel 2.6.18.13
  • Linux Kernel 2.6.18.14
  • Linux Kernel 2.6.18.15
  • Linux Kernel 2.6.18.16
  • Linux Kernel 2.6.18.17
  • Linux Kernel 2.6.18.18
  • Linux Kernel 2.6.18.19
  • Linux Kernel 2.6.18.2
  • Linux Kernel 2.6.18.20
  • Linux Kernel 2.6.18.21
  • Linux Kernel 2.6.18.22
  • Linux Kernel 2.6.18.23
  • Linux Kernel 2.6.18.24
  • Linux Kernel 2.6.18.25
  • Linux Kernel 2.6.18.26
  • Linux Kernel 2.6.18.27
  • Linux Kernel 2.6.18.28
  • Linux Kernel 2.6.18.29
  • Linux Kernel 2.6.18.3
  • Linux Kernel 2.6.18.30
  • Linux Kernel 2.6.18.31
  • Linux Kernel 2.6.18.32
  • Linux Kernel 2.6.18.33
  • Linux Kernel 2.6.18.34
  • Linux Kernel 2.6.18.35
  • Linux Kernel 2.6.18.36
  • Linux Kernel 2.6.18.37
  • Linux Kernel 2.6.18.38
  • Linux Kernel 2.6.18.39
  • Linux Kernel 2.6.18.4
  • Linux Kernel 2.6.18.40
  • Linux Kernel 2.6.18.41
  • Linux Kernel 2.6.18.42
  • Linux Kernel 2.6.18.43
  • Linux Kernel 2.6.18.44
  • Linux Kernel 2.6.18.45
  • Linux Kernel 2.6.18.46
  • Linux Kernel 2.6.18.47
  • Linux Kernel 2.6.18.48
  • Linux Kernel 2.6.18.49
  • Linux Kernel 2.6.18.5
  • Linux Kernel 2.6.18.50
  • Linux Kernel 2.6.18.51
  • Linux Kernel 2.6.18.52
  • Linux Kernel 2.6.18.53
  • Linux Kernel 2.6.18.6
  • Linux Kernel 2.6.18.7
  • Linux Kernel 2.6.18.8
  • Linux Kernel 2.6.18.9
  • Linux Kernel 2.6.19 rc2
  • Linux Kernel 2.6.19 rc3
  • Linux Kernel 2.6.19 rc4
  • Linux Kernel 2.6.19 rc1
  • Linux Kernel 2.6.19
  • Linux Kernel 2.6.19.1
  • Linux Kernel 2.6.19.2
  • Linux Kernel 2.6.19.3
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.2
  • Linux Kernel 2.6.20
  • Linux Kernel 2.6.20 rc2
  • Linux Kernel 2.6.20.1
  • Linux Kernel 2.6.20.10
  • Linux Kernel 2.6.20.11
  • Linux Kernel 2.6.20.12
  • Linux Kernel 2.6.20.13
  • Linux Kernel 2.6.20.14
  • Linux Kernel 2.6.20.15
  • Linux Kernel 2.6.20.2
  • Linux Kernel 2.6.20.3
  • Linux Kernel 2.6.20.4
  • Linux Kernel 2.6.20.5
  • Linux Kernel 2.6.20.6
  • Linux Kernel 2.6.20.7
  • Linux Kernel 2.6.20.8
  • Linux Kernel 2.6.20.9
  • Linux Kernel 2.6.21 rc3
  • Linux Kernel 2.6.21 rc7
  • Linux Kernel 2.6.21 rc5
  • Linux Kernel 2.6.21 rc6
  • Linux Kernel 2.6.21 git1
  • Linux Kernel 2.6.21 git2
  • Linux Kernel 2.6.21 git3
  • Linux Kernel 2.6.21 git4
  • Linux Kernel 2.6.21 git5
  • Linux Kernel 2.6.21 git6
  • Linux Kernel 2.6.21 git7
  • Linux Kernel 2.6.21
  • Linux Kernel 2.6.21 rc4
  • Linux Kernel 2.6.21.1
  • Linux Kernel 2.6.21.2
  • Linux Kernel 2.6.21.3
  • Linux Kernel 2.6.21.4
  • Novell SLE SDK 10 SP2
  • Novell SUSE Linux Enterprise 10 SP2 DEBUGINFO
  • Novell SUSE Linux Enterprise Desktop 10 SP2
  • Novell SUSE Linux Enterprise Server 10 SP2
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client

Reported:

May 01, 2008

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