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Test ID:1.3.6.1.4.1.25623.1.0.71400
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2012:0743
Summary:NOSUMMARY
Description:Description:
The remote host is missing updates announced in
advisory RHSA-2012:0743.

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.

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-2012-0743.html

Risk factor : High

Cross-Ref: 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-2012-1179
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
http://secunia.com/advisories/48898
SuSE Security Announcement: SUSE-SU-2012:0554 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
Common Vulnerability Exposure (CVE) ID: CVE-2012-2119
http://marc.info/?l=linux-netdev&m=133455718001608&w=2
http://www.openwall.com/lists/oss-security/2012/04/19/14
SuSE Security Announcement: openSUSE-SU-2013:0925 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
http://ubuntu.com/usn/usn-1529-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-2121
http://www.openwall.com/lists/oss-security/2012/04/19/16
RedHat Security Advisories: RHSA-2012:0676
http://rhn.redhat.com/errata/RHSA-2012-0676.html
http://www.securitytracker.com/id?1027083
http://secunia.com/advisories/50732
http://www.ubuntu.com/usn/USN-1577-1
http://www.ubuntu.com/usn/USN-2036-1
http://www.ubuntu.com/usn/USN-2037-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-2123
BugTraq ID: 53166
http://www.securityfocus.com/bid/53166
Debian Security Information: DSA-2469 (Google Search)
http://www.debian.org/security/2012/dsa-2469
http://www.openwall.com/lists/oss-security/2012/04/20/6
RedHat Security Advisories: RHSA-2012:0670
http://rhn.redhat.com/errata/RHSA-2012-0670.html
http://www.securitytracker.com/id?1027072
XForce ISS Database: linux-kernel-fcaps-sec-bypass(75043)
https://exchange.xforce.ibmcloud.com/vulnerabilities/75043
Common Vulnerability Exposure (CVE) ID: CVE-2012-2136
BugTraq ID: 53721
http://www.securityfocus.com/bid/53721
RedHat Security Advisories: RHSA-2012:1087
http://rhn.redhat.com/errata/RHSA-2012-1087.html
http://secunia.com/advisories/50807
http://www.ubuntu.com/usn/USN-1535-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-2137
BugTraq ID: 54063
http://www.securityfocus.com/bid/54063
http://ubuntu.5.n6.nabble.com/PATCH-Oneiric-CVE-2012-2137-KVM-Fix-buffer-overflow-in-kvm-set-irq-td4990566.html
http://secunia.com/advisories/50952
http://secunia.com/advisories/50961
http://www.ubuntu.com/usn/USN-1594-1
http://www.ubuntu.com/usn/USN-1606-1
http://ubuntu.com/usn/usn-1607-1
http://www.ubuntu.com/usn/USN-1609-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-2372
BugTraq ID: 54062
http://www.securityfocus.com/bid/54062
RedHat Security Advisories: RHSA-2012:1540
http://rhn.redhat.com/errata/RHSA-2012-1540.html
SuSE Security Announcement: SUSE-SU-2012:1679 (Google Search)
https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
Common Vulnerability Exposure (CVE) ID: CVE-2012-2373
http://www.openwall.com/lists/oss-security/2012/05/18/11
CopyrightCopyright (c) 2012 E-Soft Inc. http://www.securityspace.com

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