Linux Kernel blk_rq_map_user_iov denial of service

linux-blkrqmapuseriov-dos (64496) The risk level is classified as MediumMedium Risk

Description:

Linux Kernel is vulnerable to a denial of service, caused by an error within the blk_rq_map_user_iov() function when processing malformed I/O requests. By sending a zero-length I/O request in a device ioctl to a SCSI device, a local attacker could exploit this vulnerability to cause the kernel to panic.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 1.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Apply the patch for this vulnerability, available from the Linux Kernel GIT Repository. See References.

References:

  • Linux Kernel GIT Repository: block: check for proper length of iov entries earlier in blk_rq_map_user_iov() .
  • BID-45660: Linux Kernel 'blk_rq_map_user_iov()' Local Denial of Service Vulnerability
  • CVE-2010-4668: The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 2.6.37-rc7 allows local users to cause a denial of service (panic) via a zero-length I/O request in a device ioctl to a SCSI device, related to an unaligned map. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4163.
  • DSA-2153: linux-2.6 -- privilege escalation/denial of service/information leak
  • RHSA-2011-0007: Important: kernel security and bug fix update
  • RHSA-2011-0330: Important: kernel-rt security and bug fix update
  • SUSE-SA:2011:012: Linux kernel security update
  • SUSE-SA:2011:017: Linux kernel security problems
  • SUSE-SA:2011:020: Linux kernel security update

Platforms Affected:

  • Linux Kernel 2.6.0
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.11
  • 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
  • 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
  • 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 2.6.13.5
  • Linux Kernel 2.6.14
  • 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 2.6.14.6
  • Linux Kernel 2.6.14.7
  • Linux Kernel 2.6.15
  • 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 2.6.15.6
  • Linux Kernel 2.6.15.7
  • Linux Kernel 2.6.16
  • 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 -rc3
  • Linux Kernel 2.6.16.31 -rc2
  • Linux Kernel 2.6.16.31 -rc4
  • Linux Kernel 2.6.16.31 -rc1
  • Linux Kernel 2.6.16.31 -rc5
  • 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 2.6.16.42
  • 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 2.6.16.54
  • Linux Kernel 2.6.16.55
  • Linux Kernel 2.6.16.56
  • Linux Kernel 2.6.16.57
  • Linux Kernel 2.6.16.58
  • Linux Kernel 2.6.16.59
  • Linux Kernel 2.6.16.6
  • Linux Kernel 2.6.16.60
  • Linux Kernel 2.6.16.61
  • Linux Kernel 2.6.16.62
  • 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 2.6.17.1
  • 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 rc4
  • Linux Kernel 2.6.18 rc3
  • Linux Kernel 2.6.18
  • Linux Kernel 2.6.18 rc2
  • Linux Kernel 2.6.18 rc1
  • Linux Kernel 2.6.18 rc7
  • Linux Kernel 2.6.18 rc6
  • Linux Kernel 2.6.18 rc5
  • Linux Kernel 2.6.18.1
  • Linux Kernel 2.6.18.2
  • Linux Kernel 2.6.18.3
  • Linux Kernel 2.6.18.4
  • Linux Kernel 2.6.18.5
  • Linux Kernel 2.6.18.6
  • Linux Kernel 2.6.18.7
  • Linux Kernel 2.6.18.8
  • 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 2.6.19.4
  • Linux Kernel 2.6.19.5
  • Linux Kernel 2.6.19.6
  • Linux Kernel 2.6.19.7
  • Linux Kernel 2.6.2
  • Linux Kernel 2.6.20
  • 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 2.6.20.16
  • Linux Kernel 2.6.20.17
  • Linux Kernel 2.6.20.18
  • Linux Kernel 2.6.20.19
  • Linux Kernel 2.6.20.2
  • Linux Kernel 2.6.20.20
  • Linux Kernel 2.6.20.21
  • 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
  • Linux Kernel 2.6.21.1
  • Linux Kernel 2.6.21.2
  • Linux Kernel 2.6.21.3
  • Linux Kernel 2.6.21.4
  • Linux Kernel 2.6.21.5
  • Linux Kernel 2.6.21.6
  • Linux Kernel 2.6.21.7
  • Linux Kernel 2.6.22
  • Linux Kernel 2.6.22.1
  • Linux Kernel 2.6.22.10
  • Linux Kernel 2.6.22.11
  • Linux Kernel 2.6.22.12
  • Linux Kernel 2.6.22.13
  • Linux Kernel 2.6.22.14
  • Linux Kernel 2.6.22.15
  • Linux Kernel 2.6.22.16
  • Linux Kernel 2.6.22.17
  • Linux Kernel 2.6.22.18
  • Linux Kernel 2.6.22.19
  • Linux Kernel 2.6.22.2
  • Linux Kernel 2.6.22.20
  • Linux Kernel 2.6.22.21
  • Linux Kernel 2.6.22.22
  • Linux Kernel 2.6.22.3
  • Linux Kernel 2.6.22.4
  • Linux Kernel 2.6.22.5
  • Linux Kernel 2.6.22.6
  • Linux Kernel 2.6.22.7
  • Linux Kernel 2.6.22.8
  • Linux Kernel 2.6.22.9
  • Linux Kernel 2.6.23 RC2
  • Linux Kernel 2.6.23 RC1
  • Linux Kernel 2.6.23
  • Linux Kernel 2.6.23.1
  • Linux Kernel 2.6.23.10
  • Linux Kernel 2.6.23.11
  • Linux Kernel 2.6.23.12
  • Linux Kernel 2.6.23.13
  • Linux Kernel 2.6.23.14
  • Linux Kernel 2.6.23.15
  • Linux Kernel 2.6.23.16
  • Linux Kernel 2.6.23.17
  • Linux Kernel 2.6.23.2
  • Linux Kernel 2.6.23.3
  • Linux Kernel 2.6.23.4
  • Linux Kernel 2.6.23.5
  • Linux Kernel 2.6.23.6
  • Linux Kernel 2.6.23.7
  • Linux Kernel 2.6.23.8
  • Linux Kernel 2.6.23.9
  • Linux Kernel 2.6.24 rc2
  • Linux Kernel 2.6.24 rc3
  • Linux Kernel 2.6.24 rc1
  • Linux Kernel 2.6.24
  • Linux Kernel 2.6.24 rc4
  • Linux Kernel 2.6.24 rc5
  • Linux Kernel 2.6.24.1
  • Linux Kernel 2.6.24.2
  • Linux Kernel 2.6.24.3
  • Linux Kernel 2.6.24.4
  • Linux Kernel 2.6.24.5
  • Linux Kernel 2.6.24.6
  • Linux Kernel 2.6.24.7
  • Linux Kernel 2.6.25
  • Linux Kernel 2.6.25.1
  • Linux Kernel 2.6.25.10
  • Linux Kernel 2.6.25.11
  • Linux Kernel 2.6.25.12
  • Linux Kernel 2.6.25.13
  • Linux Kernel 2.6.25.14
  • Linux Kernel 2.6.25.15
  • Linux Kernel 2.6.25.16
  • Linux Kernel 2.6.25.17
  • Linux Kernel 2.6.25.18
  • Linux Kernel 2.6.25.19
  • Linux Kernel 2.6.25.2
  • Linux Kernel 2.6.25.20
  • Linux Kernel 2.6.25.3
  • Linux Kernel 2.6.25.4
  • Linux Kernel 2.6.25.5
  • Linux Kernel 2.6.25.6
  • Linux Kernel 2.6.25.7
  • Linux Kernel 2.6.25.8
  • Linux Kernel 2.6.25.9
  • Linux Kernel 2.6.26 rc4
  • Linux Kernel 2.6.26
  • Linux Kernel 2.6.26.1
  • Linux Kernel 2.6.26.2
  • Linux Kernel 2.6.26.3
  • Linux Kernel 2.6.26.4
  • Linux Kernel 2.6.26.5
  • Linux Kernel 2.6.26.6
  • Linux Kernel 2.6.26.7
  • Linux Kernel 2.6.26.8
  • Linux Kernel 2.6.27 rc2
  • Linux Kernel 2.6.27 rc5
  • Linux Kernel 2.6.27 rc6
  • Linux Kernel 2.6.27 rc8
  • Linux Kernel 2.6.27
  • Linux Kernel 2.6.27 rc9
  • Linux Kernel 2.6.27 rc4
  • Linux Kernel 2.6.27 rc7
  • Linux Kernel 2.6.27 rc3
  • Linux Kernel 2.6.27 rc1
  • Linux Kernel 2.6.27.10
  • Linux Kernel 2.6.27.11
  • Linux Kernel 2.6.27.12
  • Linux Kernel 2.6.27.20
  • Linux Kernel 2.6.27.22
  • Linux Kernel 2.6.27.23
  • Linux Kernel 2.6.27.24
  • Linux Kernel 2.6.27.33
  • Linux Kernel 2.6.27.34
  • Linux Kernel 2.6.27.35
  • Linux Kernel 2.6.27.36
  • Linux Kernel 2.6.27.37
  • Linux Kernel 2.6.27.5
  • Linux Kernel 2.6.27.6
  • Linux Kernel 2.6.27.7
  • Linux Kernel 2.6.27.8
  • Linux Kernel 2.6.27.9
  • Linux Kernel 2.6.28 rc4
  • Linux Kernel 2.6.28 rc7
  • Linux Kernel 2.6.28
  • Linux Kernel 2.6.28 rc2
  • Linux Kernel 2.6.28 git7
  • Linux Kernel 2.6.28 rc1
  • Linux Kernel 2.6.28 rc6
  • Linux Kernel 2.6.28 rc3
  • Linux Kernel 2.6.28 rc5
  • Linux Kernel 2.6.28.1
  • Linux Kernel 2.6.28.10
  • Linux Kernel 2.6.28.2
  • Linux Kernel 2.6.28.3
  • Linux Kernel 2.6.28.4
  • Linux Kernel 2.6.28.5
  • Linux Kernel 2.6.28.6
  • Linux Kernel 2.6.28.7
  • Linux Kernel 2.6.28.8
  • Linux Kernel 2.6.28.9
  • Linux Kernel 2.6.29 rc2
  • Linux Kernel 2.6.29 rc8-KK
  • Linux Kernel 2.6.29 rc2 Git7
  • Linux Kernel 2.6.29
  • Linux Kernel 2.6.29 git1
  • Linux Kernel 2.6.29 rc1
  • Linux Kernel 2.6.29.1
  • Linux Kernel 2.6.29.2
  • Linux Kernel 2.6.29.3
  • Linux Kernel 2.6.29.4
  • Linux Kernel 2.6.29.5
  • Linux Kernel 2.6.29.6
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.30 rc7-Git6
  • Linux Kernel 2.6.30 rc3
  • Linux Kernel 2.6.30 rc6
  • Linux Kernel 2.6.30 rc5
  • Linux Kernel 2.6.30
  • Linux Kernel 2.6.30 rc1
  • Linux Kernel 2.6.30 rc2
  • Linux Kernel 2.6.30.1
  • Linux Kernel 2.6.30.10
  • Linux Kernel 2.6.30.2
  • Linux Kernel 2.6.30.3
  • Linux Kernel 2.6.30.4
  • Linux Kernel 2.6.30.5
  • Linux Kernel 2.6.30.6
  • Linux Kernel 2.6.30.7
  • Linux Kernel 2.6.30.8
  • Linux Kernel 2.6.30.9
  • Linux Kernel 2.6.31
  • Linux Kernel 2.6.31 rc8
  • Linux Kernel 2.6.31 rc3
  • Linux Kernel 2.6.31 rc1
  • Linux Kernel 2.6.31 rc2
  • Linux Kernel 2.6.31 rc4
  • Linux Kernel 2.6.31 rc5
  • Linux Kernel 2.6.31 rc6
  • Linux Kernel 2.6.31 rc7
  • Linux Kernel 2.6.31.1
  • Linux Kernel 2.6.31.10
  • Linux Kernel 2.6.31.11
  • Linux Kernel 2.6.31.12
  • Linux Kernel 2.6.31.13
  • Linux Kernel 2.6.31.14
  • Linux Kernel 2.6.31.2
  • Linux Kernel 2.6.31.3
  • Linux Kernel 2.6.31.4
  • Linux Kernel 2.6.31.5
  • Linux Kernel 2.6.31.6
  • Linux Kernel 2.6.31.7
  • Linux Kernel 2.6.31.8
  • Linux Kernel 2.6.31.9
  • Linux Kernel 2.6.32 rc4
  • Linux Kernel 2.6.32 rc1
  • Linux Kernel 2.6.32 Git-6
  • Linux Kernel 2.6.32 rc8
  • Linux Kernel 2.6.32 rc7
  • Linux Kernel 2.6.32
  • Linux Kernel 2.6.32 rc5
  • Linux Kernel 2.6.32 rc3
  • Linux Kernel 2.6.32 rc6
  • Linux Kernel 2.6.32.1
  • Linux Kernel 2.6.32.10
  • Linux Kernel 2.6.32.11
  • Linux Kernel 2.6.32.12
  • Linux Kernel 2.6.32.13
  • Linux Kernel 2.6.32.14
  • Linux Kernel 2.6.32.15
  • Linux Kernel 2.6.32.16
  • Linux Kernel 2.6.32.17
  • Linux Kernel 2.6.32.18
  • Linux Kernel 2.6.32.19
  • Linux Kernel 2.6.32.2
  • Linux Kernel 2.6.32.20
  • Linux Kernel 2.6.32.3
  • Linux Kernel 2.6.32.4
  • Linux Kernel 2.6.32.5
  • Linux Kernel 2.6.32.6
  • Linux Kernel 2.6.32.7
  • Linux Kernel 2.6.32.8
  • Linux Kernel 2.6.32.9
  • Linux Kernel 2.6.33
  • Linux Kernel 2.6.33 rc1
  • Linux Kernel 2.6.33 rc7
  • Linux Kernel 2.6.33 rc6
  • Linux Kernel 2.6.33 rc5
  • Linux Kernel 2.6.33 rc4
  • Linux Kernel 2.6.33 rc3
  • Linux Kernel 2.6.33 rc2
  • Linux Kernel 2.6.33.1
  • Linux Kernel 2.6.33.2
  • Linux Kernel 2.6.33.3
  • Linux Kernel 2.6.33.4
  • Linux Kernel 2.6.33.5
  • Linux Kernel 2.6.33.6
  • Linux Kernel 2.6.33.7
  • Linux Kernel 2.6.34
  • Linux Kernel 2.6.34.1
  • Linux Kernel 2.6.34.2
  • Linux Kernel 2.6.34.3
  • Linux Kernel 2.6.34.4
  • Linux Kernel 2.6.34.5
  • Linux Kernel 2.6.34.6
  • Linux Kernel 2.6.34.7
  • Linux Kernel 2.6.35
  • Linux Kernel 2.6.35.1
  • Linux Kernel 2.6.35.2
  • Linux Kernel 2.6.35.3
  • Linux Kernel 2.6.35.4
  • Linux Kernel 2.6.35.5
  • Linux Kernel 2.6.35.6
  • Linux Kernel 2.6.35.7
  • Linux Kernel 2.6.35.8
  • Linux Kernel 2.6.36
  • Linux Kernel 2.6.36.1
  • Linux Kernel 2.6.36.2
  • Linux Kernel 2.6.37 rc1
  • Linux Kernel 2.6.37 rc2
  • Linux Kernel 2.6.37 rc6
  • Linux Kernel 2.6.37 rc4
  • Linux Kernel 2.6.37 rc5
  • Linux Kernel 2.6.37 rc3
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.7
  • Linux Kernel 2.6.8
  • Linux Kernel 2.6.8.1
  • Linux Kernel 2.6.9
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6
  • RedHat Enterprise Linux Server EUS 6.0.z
  • RedHat MRG v1 for Red Hat Enterprise Linux 5

Reported:

Nov 29, 2010

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