[RHSA-2012:0743-01] Important: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2012:0743-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0743.html

Issue date: 2012-06-18

CVE Names: CVE-2012-0044 CVE-2012-1179 CVE-2012-2119

CVE-2012-2121 CVE-2012-2123 CVE-2012-2136

CVE-2012-2137 CVE-2012-2372 CVE-2012-2373

=====================================================================

 

1. Summary:

 

Updated kernel packages that fix multiple security issues and several bugs

are now available for Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having

important security impact. Common Vulnerability Scoring System (CVSS) base

scores, which give detailed severity ratings, are available for each

vulnerability from the CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

This update fixes the following security issues:

 

* A local, unprivileged user could use an integer overflow flaw in

drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their

privileges. (CVE-2012-0044, Important)

 

* A buffer overflow flaw was found in the macvtap device driver, used for

creating a bridged network between the guest and the host in KVM

(Kernel-based Virtual Machine) environments. A privileged guest user in a

KVM guest could use this flaw to crash the host. Note: This issue only

affected hosts that have the vhost_net module loaded with the

experimental_zcopytx module option enabled (it is not enabled by default),

and that also have macvtap configured for at least one guest.

(CVE-2012-2119, Important)

 

* When a set user ID (setuid) application is executed, certain personality

flags for controlling the application's behavior are cleared (that is, a

privileged application will not be affected by those flags). It was found

that those flags were not cleared if the application was made privileged

via file system capabilities. A local, unprivileged user could use this

flaw to change the behavior of such applications, allowing them to bypass

intended restrictions. Note that for default installations, no application

shipped by Red Hat for Red Hat Enterprise Linux is made privileged via file

system capabilities. (CVE-2012-2123, Important)

 

* It was found that the data_len parameter of the sock_alloc_send_pskb()

function in the Linux kernel's networking implementation was not validated

before use. A privileged guest user in a KVM guest could use this flaw to

crash the host or, possibly, escalate their privileges on the host.

(CVE-2012-2136, Important)

 

* A buffer overflow flaw was found in the setup_routing_entry() function in

the KVM subsystem of the Linux kernel in the way the Message Signaled

Interrupts (MSI) routing entry was handled. A local, unprivileged user

could use this flaw to cause a denial of service or, possibly, escalate

their privileges. (CVE-2012-2137, Important)

 

* A race condition was found in the Linux kernel's memory management

subsystem in the way pmd_none_or_clear_bad(), when called with mmap_sem in

read mode, and Transparent Huge Pages (THP) page faults interacted. A

privileged user in a KVM guest with the ballooning functionality enabled

could potentially use this flaw to crash the host. A local, unprivileged

user could use this flaw to crash the system. (CVE-2012-1179, Moderate)

 

* A flaw was found in the way device memory was handled during guest device

removal. Upon successful device removal, memory used by the device was not

properly unmapped from the corresponding IOMMU or properly released from

the kernel, leading to a memory leak. A malicious user on a KVM host who

has the ability to assign a device to a guest could use this flaw to crash

the host. (CVE-2012-2121, Moderate)

 

* A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS)

protocol implementation. A local, unprivileged user could use this flaw to

cause a denial of service. (CVE-2012-2372, Moderate)

 

* A race condition was found in the Linux kernel's memory management

subsystem in the way pmd_populate() and pte_offset_map_lock() interacted on

32-bit x86 systems with more than 4GB of RAM. A local, unprivileged user

could use this flaw to cause a denial of service. (CVE-2012-2373, Moderate)

 

Red Hat would like to thank Chen Haogang for reporting CVE-2012-0044.

 

This update also fixes several bugs. Documentation for these changes will

be available shortly from the Technical Notes document linked to in the

References section.

 

Users should upgrade to these updated packages, which contain backported

patches to correct these issues, and fix the bugs noted in the Technical

Notes. The system must be rebooted for this update to take effect.

 

4. Solution:

 

Before applying this update, make sure all previously-released errata

relevant to your system have been applied.

 

This update is available via the Red Hat Network. Details on how to

use the Red Hat Network to apply this update are available at

https://access.redhat.com/knowledge/articles/11258

 

To install kernel packages manually, use "rpm -ivh [package]". Do not

use "rpm -Uvh" as that will remove the running kernel binaries from

your system. You may use "rpm -e" to remove old kernels after

determining that the new kernel functions properly on your system.

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

772894 - CVE-2012-0044 kernel: drm: integer overflow in drm_mode_dirtyfb_ioctl()

803793 - CVE-2012-1179 kernel: thp:__split_huge_page() mapcount != page_mapcount BUG_ON()

806722 - CVE-2012-2123 kernel: fcaps: clear the same personality flags as suid when fcaps are used

814149 - CVE-2012-2121 kvm: device assignment page leak

814278 - CVE-2012-2119 kernel: macvtap: zerocopy: vector length is not validated before pinning user pages

814657 - kernel crash at ieee80211_mgd_probe_ap_send [rhel-6.2.z]

816151 - CVE-2012-2137 kernel: kvm: buffer overflow in kvm_set_irq()

816226 - add option to disable 5GHz band to iwlwifi [rhel-6.2.z]

816289 - CVE-2012-2136 kernel: net: insufficient data_len validation in sock_alloc_send_pskb()

818504 - Disable LRO for all NICs that have LRO enabled [rhel-6.2.z]

818505 - xen: fix drive naming [rhel-6.2.z]

819614 - 2.6.32-220 kernel does not work on a HP DL385G6 with HP Smart Array P410 controller and hpsa driver [rhel-6.2.z]

822754 - CVE-2012-2372 kernel: rds-ping cause kernel panic

822821 - CVE-2012-2373 kernel: mm: read_pmd_atomic: 32bit PAE pmd walk vs pmd_populate SMP race condition

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

kernel-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-headers-2.6.32-220.23.1.el6.i686.rpm

perf-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

noarch:

kernel-doc-2.6.32-220.23.1.el6.noarch.rpm

kernel-firmware-2.6.32-220.23.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

kernel-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-headers-2.6.32-220.23.1.el6.x86_64.rpm

perf-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

noarch:

kernel-doc-2.6.32-220.23.1.el6.noarch.rpm

kernel-firmware-2.6.32-220.23.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

kernel-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-headers-2.6.32-220.23.1.el6.x86_64.rpm

perf-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

kernel-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-headers-2.6.32-220.23.1.el6.i686.rpm

perf-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

noarch:

kernel-doc-2.6.32-220.23.1.el6.noarch.rpm

kernel-firmware-2.6.32-220.23.1.el6.noarch.rpm

 

ppc64:

kernel-2.6.32-220.23.1.el6.ppc64.rpm

kernel-bootwrapper-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debug-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-220.23.1.el6.ppc64.rpm

kernel-devel-2.6.32-220.23.1.el6.ppc64.rpm

kernel-headers-2.6.32-220.23.1.el6.ppc64.rpm

perf-2.6.32-220.23.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

 

s390x:

kernel-2.6.32-220.23.1.el6.s390x.rpm

kernel-debug-2.6.32-220.23.1.el6.s390x.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-220.23.1.el6.s390x.rpm

kernel-devel-2.6.32-220.23.1.el6.s390x.rpm

kernel-headers-2.6.32-220.23.1.el6.s390x.rpm

kernel-kdump-2.6.32-220.23.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

kernel-kdump-devel-2.6.32-220.23.1.el6.s390x.rpm

perf-2.6.32-220.23.1.el6.s390x.rpm

perf-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

 

x86_64:

kernel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

kernel-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-headers-2.6.32-220.23.1.el6.x86_64.rpm

perf-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

ppc64:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-220.23.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

python-perf-2.6.32-220.23.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.ppc64.rpm

 

s390x:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-220.23.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

perf-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

python-perf-2.6.32-220.23.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.s390x.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

kernel-devel-2.6.32-220.23.1.el6.i686.rpm

kernel-headers-2.6.32-220.23.1.el6.i686.rpm

perf-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

noarch:

kernel-doc-2.6.32-220.23.1.el6.noarch.rpm

kernel-firmware-2.6.32-220.23.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

kernel-devel-2.6.32-220.23.1.el6.x86_64.rpm

kernel-headers-2.6.32-220.23.1.el6.x86_64.rpm

perf-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/kernel-2.6.32-220.23.1.el6.src.rpm

 

i386:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-220.23.1.el6.i686.rpm

perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

python-perf-2.6.32-220.23.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.i686.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.23.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-2.6.32-220.23.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.23.1.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2012-0044.html

https://www.redhat.com/security/data/cve/CVE-2012-1179.html

https://www.redhat.com/security/data/cve/CVE-2012-2119.html

https://www.redhat.com/security/data/cve/CVE-2012-2121.html

https://www.redhat.com/security/data/cve/CVE-2012-2123.html

https://www.redhat.com/security/data/cve/CVE-2012-2136.html

https://www.redhat.com/security/data/cve/CVE-2012-2137.html

https://www.redhat.com/security/data/cve/CVE-2012-2372.html

https://www.redhat.com/security/data/cve/CVE-2012-2373.html

https://access.redhat.com/security/updates/classification/#important

https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_Technical_Notes/kernel.html#RHSA-2012-0743

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2012 Red Hat, Inc.

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