Linux kernel run_posix_cpu_timers denial of service
| linux-runposixcputimers-dos (27380) |  Low Risk |
Description:
Linux kernel could allow a local attacker to cause a denial of service, caused by a race condition in the run_posix_cpu_timers function in posix-cpu-timers.c. An attacker could exploit this vulnerability to cause the system to crash by attaching the CPU timer to an exiting process.
Platforms Affected:
- Canonical, Ubuntu 5.04
- Canonical, Ubuntu 5.10
- Canonical, Ubuntu 6.06 LTS
- Linux, Kernel 2.6.0 test9
- Linux, Kernel 2.6.0 test9-cvs
- Linux, Kernel 2.6.0 test8
- Linux, Kernel 2.6.0 test7
- Linux, Kernel 2.6.0 test6
- Linux, Kernel 2.6.0 test5
- Linux, Kernel 2.6.0
- Linux, Kernel 2.6.0 test3
- Linux, Kernel 2.6.0 test2
- Linux, Kernel 2.6.0 test11
- Linux, Kernel 2.6.0 test10
- Linux, Kernel 2.6.0 test1
- Linux, Kernel 2.6.0 test4
- Linux, Kernel 2.6.1 rc1
- Linux, Kernel 2.6.1 rc2
- Linux, Kernel 2.6.1
- Linux, Kernel 2.6.10 rc2
- Linux, Kernel 2.6.10 rc3
- Linux, Kernel 2.6.10
- Linux, Kernel 2.6.10 rc1
- Linux, Kernel 2.6.11 rc2
- Linux, Kernel 2.6.11 rc3
- Linux, Kernel 2.6.11 rc4
- Linux, Kernel 2.6.11
- Linux, Kernel 2.6.11 rc5
- Linux, Kernel 2.6.11 rc1
- Linux, Kernel 2.6.11.11
- Linux, Kernel 2.6.11.12
- 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 2.6.12 rc4
- Linux, Kernel 2.6.12 rc5
- Linux, Kernel 2.6.12 rc6
- Linux, Kernel 2.6.12 rc3
- Linux, Kernel 2.6.12 rc2
- Linux, Kernel 2.6.12 rc1
- Linux, Kernel 2.6.12.1
- Linux, Kernel 2.6.12.2
- Linux, Kernel 2.6.12.3
- Linux, Kernel 2.6.12.4
- Linux, Kernel 2.6.12.5
- Linux, Kernel 2.6.12.6
- Linux, Kernel 2.6.13 rc5
- Linux, Kernel 2.6.13 rc6
- Linux, Kernel 2.6.13 rc7
- Linux, Kernel 2.6.13 rc4
- Linux, Kernel 2.6.13
- Linux, Kernel 2.6.13 rc1
- Linux, Kernel 2.6.13 rc2
- Linux, Kernel 2.6.13 rc3
- Linux, Kernel 2.6.13.1
- Linux, Kernel 2.6.13.2
- Linux, Kernel 2.6.13.3
- Linux, Kernel 2.6.13.4
- Linux, Kernel 2.6.14 rc5
- Linux, Kernel 2.6.14 rc4
- Linux, Kernel 2.6.14 rc2
- Linux, Kernel 2.6.14
- Linux, Kernel 2.6.14 rc1
- Linux, Kernel 2.6.14 rc3
- Linux, Kernel 2.6.14.1
- Linux, Kernel 2.6.14.2
- Linux, Kernel 2.6.14.3
- Linux, Kernel 2.6.14.4
- Linux, Kernel 2.6.14.5
- Linux, Kernel 2.6.15 rc7
- Linux, Kernel 2.6.15 rc3
- Linux, Kernel 2.6.15 rc4
- Linux, Kernel 2.6.15 rc5
- Linux, Kernel 2.6.15 rc6
- Linux, Kernel 2.6.15 rc2
- Linux, Kernel 2.6.15
- Linux, Kernel 2.6.15 rc1
- Linux, Kernel 2.6.15.1
- Linux, Kernel 2.6.15.2
- Linux, Kernel 2.6.15.3
- Linux, Kernel 2.6.15.4
- Linux, Kernel 2.6.15.5
- Linux, Kernel 2.6.16 rc2
- Linux, Kernel 2.6.16 rc1
- Linux, Kernel 2.6.16 rc3
- Linux, Kernel 2.6.16 rc6
- Linux, Kernel 2.6.16 rc5
- Linux, Kernel 2.6.16 rc4
- 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 2.6.16.3
- Linux, Kernel 2.6.16.4
- Linux, Kernel 2.6.16.5
- 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 2.6.2 rc2
- Linux, Kernel 2.6.2 rc3
- Linux, Kernel 2.6.2 rc1
- Linux, Kernel 2.6.2
- Linux, Kernel 2.6.3 rc2
- Linux, Kernel 2.6.3 rc3
- 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 rc2
- Linux, Kernel 2.6.6
- Linux, Kernel 2.6.6 rc1
- Linux, Kernel 2.6.7 rc3
- Linux, Kernel 2.6.7
- Linux, Kernel 2.6.7 rc2
- Linux, Kernel 2.6.7 rc1
- Linux, Kernel 2.6.8 rc3
- Linux, Kernel 2.6.8 rc4
- Linux, Kernel 2.6.8 rc2
- Linux, Kernel 2.6.8
- Linux, Kernel 2.6.8 rc1
- Linux, Kernel 2.6.9
- Linux, Kernel 2.6.9 rc4
- Linux, Kernel 2.6.9 rc2
- Linux, Kernel 2.6.9 rc3
- Linux, Kernel 2.6.9 rc1
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- Novell, Linux Desktop 9
- SuSE, SuSE Linux 10.1
- SuSE, SuSE Linux 9.1
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest version of Linux kernel (2.6.17.1 or later), available from The Linux Kernel Archives Web site. See References.
Consequences:
Denial of Service
References:
- linux-kernel Mailing List, 2006-06-13 0:25:08, [RFC][PATCH] Avoid race w/ posix-cpu-timer and exiting tasks at http://marc.theaimsgroup.com/?l=linux-kernel&m=115015841413687.
- The Linux Kernel Archives, ChangeLog-2.6.16.21 at http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.21.
- The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org.
- BID-18615: Linux Kernel POSIX-CPU-TIMERS.C Local Denial of Service Vulnerability
- CVE-2006-2445: Race condition in run_posix_cpu_timers in Linux kernel before 2.6.16.21 allows local users to cause a denial of service (BUG_ON crash) by causing one CPU to attach a timer to a process that is exiting.
- MDKSA-2006:123: Updated kernel packages fixes multiple vulnerabilities
- OSVDB ID: 26947: Linux Kernel run_posix_cpu_timers Process Timer Local DoS
- SA20703: Linux Kernel Information Disclosure and Denial of Service
- SUSE-SA:2006:042: kernel local privilege escalation
- USN-311-1: Linux kernel vulnerabilities
- VUPEN/ADV-2006-2451: Linux Kernel Security Update Fixes Multiple Denial of Service Vulnerabilities
Reported:
Jun 13, 2006
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