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Test ID:1.3.6.1.4.1.25623.1.0.71936
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2012:1042
Summary:NOSUMMARY
Description:Description:
The remote host is missing updates announced in
advisory RHSA-2012:1042.

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)

* It was found that the kvm_vm_ioctl_assign_device() function in the KVM
(Kernel-based Virtual Machine) subsystem of a Linux kernel did not check if
the user requesting device assignment was privileged or not. A local,
unprivileged user on the host could assign unused PCI devices, or even
devices that were in use and whose resources were not properly claimed by
the respective drivers, which could result in the host crashing.
(CVE-2011-4347, Moderate)

* A flaw was found in the way the Linux kernel's XFS file system
implementation handled on-disk Access Control Lists (ACLs). A local,
unprivileged user could use this flaw to cause a denial of service or
escalate their privileges by mounting a specially-crafted disk.
(CVE-2012-0038, Moderate)

* It was found that the Linux kernel's register set (regset) common
infrastructure implementation did not check if the required get and set
handlers were initialized. A local, unprivileged user could use this flaw
to cause a denial of service by performing a register set operation with a
ptrace() PTRACE_SETREGSET or PTRACE_GETREGSET request. (CVE-2012-1097,
Moderate)

* 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)

Red Hat would like to thank Chen Haogang for reporting CVE-2012-0044
Sasha
Levin for reporting CVE-2011-4347
Wang Xi for reporting CVE-2012-0038
and
H. Peter Anvin for reporting CVE-2012-1097.

This update also fixes the following bugs:

* When a RoCE (RDMA over Converged Ethernet) adapter with active RoCE
communications was taken down suddenly (either by adapter failure or the
intentional shutdown of the interface), the ongoing RoCE communications
could cause the kernel to panic and render the machine unusable. A patch
has been provided to protect the kernel in this situation and to pass an
error up to the application still using the interface after it has been
taken down instead. (BZ#799944)

* The fix for Red Hat Bugzilla bug 713494, released via RHSA-2011:0928,
introduced a regression. Attempting to change the state of certain
features, such as GRO (Generic Receive Offload) or TSO (TCP segment
offloading), for a 10 Gigabit Ethernet card that is being used in a
virtual LAN (VLAN) resulted in a kernel panic. (BZ#816974)

* If a new file was created on a Network File System version 4 (NFSv4)
share, the ownership was set to nfsnobody (-2) until it was possible to
upcall to the idmapper. As a consequence, subsequent file system operations
could incorrectly use -2 for the user and group IDs for the given file,
causing certain operations to fail. In reported cases, this issue also
caused Viminfo file is not writable errors for users running Vim with
files on an NFSv4 share. (BZ#820960)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

http://rhn.redhat.com/errata/RHSA-2012-1042.html

Risk factor : High

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-4347
http://www.openwall.com/lists/oss-security/2011/11/24/7
Common Vulnerability Exposure (CVE) ID: CVE-2012-0038
http://www.openwall.com/lists/oss-security/2012/01/10/11
Common Vulnerability Exposure (CVE) ID: CVE-2012-0044
BugTraq ID: 51371
http://www.securityfocus.com/bid/51371
http://www.openwall.com/lists/oss-security/2012/01/12/1
RedHat Security Advisories: RHSA-2012:0743
http://rhn.redhat.com/errata/RHSA-2012-0743.html
http://www.ubuntu.com/usn/USN-1555-1
http://www.ubuntu.com/usn/USN-1556-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-1097
http://www.openwall.com/lists/oss-security/2012/03/05/1
RedHat Security Advisories: RHSA-2012:0481
http://rhn.redhat.com/errata/RHSA-2012-0481.html
RedHat Security Advisories: RHSA-2012:0531
http://rhn.redhat.com/errata/RHSA-2012-0531.html
http://secunia.com/advisories/48842
http://secunia.com/advisories/48898
http://secunia.com/advisories/48964
SuSE Security Announcement: SUSE-SU-2012:0554 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
SuSE Security Announcement: SUSE-SU-2012:0616 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
Common Vulnerability Exposure (CVE) ID: CVE-2012-1179
http://lists.fedoraproject.org/pipermail/package-announce/2012-March/075781.html
HPdes Security Advisory: HPSBGN02970
http://marc.info/?l=bugtraq&m=139447903326211&w=2
http://www.openwall.com/lists/oss-security/2012/03/15/7
http://www.securitytracker.com/id?1027084
http://secunia.com/advisories/48404
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