Linux kernel subthread exec signal denial of service

kernel-subthread-dos (21138) The risk level is classified as LowLow Risk

Description:

Linux kernel is vulnerable to a denial of service attack caused by a vulnerability in the subthread exec signal processing. A local attacker could use this vulnerability to cause a kernel panic, resulting in a denial of service.

*CVSS:

Base Score: 3.5
  Access Vector: Local
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 2.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Linux Kernel (2.6.12.1 or later), avaialble from The Linux Kernel Archives Web page. See References.

For Ubuntu Linux:
Refer to USN-178-1 for patch, upgrade, or suggested workaround information. See References.

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

References:

  • The The Linux Kernel Archives Web site: The Linux Kernel Archives.
  • BID-14054: Linux Kernel Subthread Exec Local Denial Of Service Vulnerability
  • CVE-2005-1913: The Linux kernel 2.6 before 2.6.12.1 allows local users to cause a denial of service (kernel panic) via a non group-leader thread executing a different program than was pending in itimer, which causes the signal to be delivered to the old group-leader task, which does not exist.
  • SA15786: Linux Kernel Multiple Vulnerabilities
  • USN-178-1: Linux kernel vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 4.10
  • Canonical Ubuntu 5.04
  • Linux Kernel 2.6.0 test7
  • Linux Kernel 2.6.0 test6
  • Linux Kernel 2.6.0 test5
  • Linux Kernel 2.6.0 test4
  • Linux Kernel 2.6.0 test8
  • Linux Kernel 2.6.0 test9
  • Linux Kernel 2.6.0 test3
  • Linux Kernel 2.6.0
  • Linux Kernel 2.6.0 test1
  • Linux Kernel 2.6.0 test10
  • Linux Kernel 2.6.0 test2
  • Linux Kernel 2.6.0 test11
  • Linux Kernel 2.6.1 rc3
  • Linux Kernel 2.6.1 rc1
  • Linux Kernel 2.6.1 rc2
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.10 rc3
  • Linux Kernel 2.6.10 rc1
  • Linux Kernel 2.6.10 rc2
  • Linux Kernel 2.6.11 rc4
  • Linux Kernel 2.6.11 rc3
  • Linux Kernel 2.6.11 rc2
  • Linux Kernel 2.6.11
  • Linux Kernel 2.6.11 rc1
  • Linux Kernel 2.6.11 rc5
  • Linux Kernel 2.6.11.1
  • Linux Kernel 2.6.11.10
  • Linux Kernel 2.6.11.11
  • Linux Kernel 2.6.11.12
  • Linux Kernel 2.6.11.2
  • Linux Kernel 2.6.11.3
  • Linux Kernel 2.6.11.4
  • Linux Kernel 2.6.11.5
  • Linux Kernel 2.6.11.6
  • Linux Kernel 2.6.11.7
  • Linux Kernel 2.6.11.8
  • Linux Kernel 2.6.11.9
  • Linux Kernel 2.6.12 rc6
  • Linux Kernel 2.6.12 rc5
  • Linux Kernel 2.6.12 rc4
  • Linux Kernel 2.6.12 rc3
  • Linux Kernel 2.6.12 rc2
  • Linux Kernel 2.6.12 rc1
  • Linux Kernel 2.6.12
  • Linux Kernel 2.6.2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.3 rc2
  • Linux Kernel 2.6.3 rc3
  • Linux Kernel 2.6.3 rc4
  • Linux Kernel 2.6.3 rc1
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.4 rc3
  • Linux Kernel 2.6.4 rc2
  • Linux Kernel 2.6.4 rc1
  • Linux Kernel 2.6.5 rc1
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.5 rc3
  • Linux Kernel 2.6.5 rc2
  • Linux Kernel 2.6.6 rc3
  • Linux Kernel 2.6.6 rc1
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.6 rc2
  • Linux Kernel 2.6.7 rc2
  • Linux Kernel 2.6.7 rc3
  • Linux Kernel 2.6.7
  • Linux Kernel 2.6.7 rc1
  • Linux Kernel 2.6.8 rc2
  • Linux Kernel 2.6.8 rc3
  • Linux Kernel 2.6.8 rc4
  • Linux Kernel 2.6.8 rc1
  • Linux Kernel 2.6.8
  • Linux Kernel 2.6.8.1
  • Linux Kernel 2.6.9
  • Linux Kernel 2.6.9 rc2
  • Linux Kernel 2.6.9 rc3
  • Linux Kernel 2.6.9 rc4
  • Linux Kernel 2.6.9 rc1

Reported:

Jun 23, 2005

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