A flaw was reported in the permission checks done by the Linux kernel for /dev/cpu/*/msr. A local root user with all capabilities dropped could exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

A flaw was discovered in the Linux kernels handling of memory ranges with PROT_NONE when transparent hugepages are in use. An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). (CVE-2013-0309)

A flaw was discovered on the Linux kernel's VFAT filesystem driver when a disk is mounted with the utf8 option (this is the default on Ubuntu). On a system where disks/images can be auto-mounted or a FAT filesystem is mounted an unprivileged user can exploit the flaw to gain root privileges. (CVE-2013-1773).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-2520 advisory.

    - mm/hotplug: correctly add new zone to all other nodes' zone lists (Jiang Liu) [Orabug: 16603569]     {CVE-2012-5517}
    - ptrace: ptrace_resume() shouldn't wake up !TASK_TRACED thread (Oleg Nesterov) [Orabug: 16405868]     {CVE-2013-0871}
    - ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL (Oleg Nesterov) [Orabug: 16405868]     {CVE-2013-0871}
    - ptrace: introduce signal_wake_up_state() and ptrace_signal_wake_up() (Oleg Nesterov) [Orabug: 16405868]     {CVE-2013-0871}
    - Bluetooth: Fix incorrect strncpy() in hidp_setup_hid() (Anderson Lizardo) [Orabug: 16711062]     {CVE-2013-0349}
    - dccp: check ccid before dereferencing (Mathias Krause) [Orabug: 16711040] {CVE-2013-1827}
    - USB: io_ti: Fix NULL dereference in chase_port() (Wolfgang Frisch) [Orabug: 16425435] {CVE-2013-1774}
    - keys: fix race with concurrent install_user_keyrings() (David Howells) [Orabug: 16493369]     {CVE-2013-1792}
    - KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798) (Andy Honig) [Orabug:
    16710937] {CVE-2013-1798}
    - KVM: x86: fix for buffer overflow in handling of MSR_KVM_SYSTEM_TIME (CVE-2013-1796) (Jerry Snitselaar)     [Orabug: 16710794] {CVE-2013-1796}
    - net/tun: fix ioctl() based info leaks (Mathias Krause) [Orabug: 16675501] {CVE-2012-6547}
    - atm: fix info leak via getsockname() (Mathias Krause) [Orabug: 16675501] {CVE-2012-6546}
    - atm: fix info leak in getsockopt(SO_ATMPVC) (Mathias Krause) [Orabug: 16675501] {CVE-2012-6546}
    - xfrm_user: fix info leak in copy_to_user_tmpl() (Mathias Krause) [Orabug: 16675501] {CVE-2012-6537}
    - xfrm_user: fix info leak in copy_to_user_policy() (Mathias Krause) [Orabug: 16675501] {CVE-2012-6537}
    - xfrm_user: fix info leak in copy_to_user_state() (Mathias Krause) [Orabug: 16675501] {CVE-2013-6537}
    - xfrm_user: return error pointer instead of NULL #2 (Mathias Krause) [Orabug: 16675501] {CVE-2013-1826}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:0496 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    This update fixes the following security issues:

    * A race condition was found in the way asynchronous I/O and fallocate()     interacted when using the ext4 file system. A local, unprivileged user     could use this flaw to expose random data from an extent whose data blocks     have not yet been written, and thus contain data from a deleted file.
    (CVE-2012-4508, Important)

    * A flaw was found in the way the vhost kernel module handled descriptors     that spanned multiple regions. A privileged guest user in a KVM guest could     use this flaw to crash the host or, potentially, escalate their privileges     on the host. (CVE-2013-0311, Important)

    * It was found that the default SCSI command filter does not accommodate     commands that overlap across device classes. A privileged guest user could     potentially use this flaw to write arbitrary data to a LUN that is     passed-through as read-only. (CVE-2012-4542, Moderate)

    * A flaw was found in the way the xen_failsafe_callback() function in the     Linux kernel handled the failed iret (interrupt return) instruction     notification from the Xen hypervisor. An unprivileged user in a 32-bit     para-virtualized guest could use this flaw to crash the guest.
    (CVE-2013-0190, Moderate)

    * A flaw was found in the way pmd_present() interacted with PROT_NONE     memory ranges when transparent hugepages were in use. A local, unprivileged     user could use this flaw to crash the system. (CVE-2013-0309, Moderate)

    * A flaw was found in the way CIPSO (Common IP Security Option) IP options     were validated when set from user mode. A local user able to set CIPSO IP     options on the socket could use this flaw to crash the system.
    (CVE-2013-0310, Moderate)

    Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508, and     Andrew Cooper of Citrix for reporting CVE-2013-0190. Upstream acknowledges     Dmitry Monakhov as the original reporter of CVE-2012-4508. The     CVE-2012-4542 issue was discovered by Paolo Bonzini of Red Hat.

    This update also fixes several hundred bugs and adds enhancements. Refer to     the Red Hat Enterprise Linux 6.4 Release Notes for information on the most     significant of these changes, and the Technical Notes for further     information, both linked to in the References.

    All Red Hat Enterprise Linux 6 users are advised to install these updated     packages, which correct these issues, and fix the bugs and add the     enhancements noted in the Red Hat Enterprise Linux 6.4 Release Notes and     Technical Notes. The system must be rebooted for this update to take     effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-0496 advisory.

    - [virt] xen: Fix stack corruption in xen_failsafe_callback for 32bit PVOPS guests (Andrew Jones) [896050]     {CVE-2013-0190}
    - [block] sg_io: use different default filters for each device class (Paolo Bonzini) [875361]     {CVE-2012-4542}
    - [block] sg_io: prepare for adding per-device-type filters (Paolo Bonzini) [875361] {CVE-2012-4542}
    - [virt] kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set (Petr Matousek) [862904]     {CVE-2012-4461}
    - [fs] exec: do not leave bprm->interp on stack (Josh Poimboeuf) [880146] {CVE-2012-4530}
    - [fs] exec: use -ELOOP for max recursion depth (Josh Poimboeuf) [880146] {CVE-2012-4530}
    - [kernel] kmod: make __request_module() killable (Oleg Nesterov) [819529] {CVE-2012-4398}
    - [kernel] kmod: introduce call_modprobe() helper (Oleg Nesterov) [819529] {CVE-2012-4398}
    - [kernel] usermodehelper: implement UMH_KILLABLE (Oleg Nesterov) [819529] {CVE-2012-4398}
    - [kernel] usermodehelper: introduce umh_complete(sub_info) (Oleg Nesterov) [819529] {CVE-2012-4398}
    - [kernel] call_usermodehelper: simplify/fix UMH_NO_WAIT case (Oleg Nesterov) [819529] {CVE-2012-4398}
    - [kernel] wait_for_helper: SIGCHLD from user-space can lead to use-after-free (Oleg Nesterov) [819529]     {CVE-2012-4398}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux kernel was updated to fix various bugs and security issues :

CVE-2013-0871: Race condition in the ptrace functionality in the Linux kernel allowed local users to gain privileges via a PTRACE_SETREGS ptrace system call in a crafted application, as demonstrated by ptrace_death.

CVE-2013-0160: Avoid a side channel attack on /dev/ptmx (keyboard input timing).

CVE-2012-5374: Fixed a local denial of service in the BTRFS hashing code.

CVE-2013-0309: arch/x86/include/asm/pgtable.h in the Linux kernel, when transparent huge pages are used, does not properly support PROT_NONE memory regions, which allows local users to cause a denial of service (system crash) via a crafted application.

CVE-2013-0268: The msr_open function in arch/x86/kernel/msr.c in the Linux kernel allowed local users to bypass intended capability restrictions by executing a crafted application as root, as demonstrated by msr32.c.

CVE-2012-0957: The override_release function in kernel/sys.c in the Linux kernel allowed local users to obtain sensitive information from kernel stack memory via a uname system call in conjunction with a UNAME26 personality.

CVE-2013-0216: The Xen netback functionality in the Linux kernel allowed guest OS users to cause a denial of service (loop) by triggering ring pointer corruption.

CVE-2013-0231: The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen for the Linux kernel allowed guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages.
NOTE: some of these details are obtained from third-party information.

CVE-2012-4530: The load_script function in fs/binfmt_script.c in the Linux kernel did not properly handle recursion, which allowed local users to obtain sensitive information from kernel stack memory via a crafted application.

CVE-2012-4508: Race condition in fs/ext4/extents.c in the Linux kernel allowed local users to obtain sensitive information from a deleted file by reading an extent that was not properly marked as uninitialized.

CVE-2012-3412: The sfc (aka Solarflare Solarstorm) driver in the Linux kernel allowed remote attackers to cause a denial of service (DMA descriptor consumption and network-controller outage) via crafted TCP packets that trigger a small MSS value.

CVE-2012-2745: The copy_creds function in kernel/cred.c in the Linux kernel provided an invalid replacement session keyring to a child process, which allowed local users to cause a denial of service (panic) via a crafted application that uses the fork system call.

CVE-2012-3375: The epoll_ctl system call in fs/eventpoll.c in the Linux kernel did not properly handle ELOOP errors in EPOLL_CTL_ADD operations, which allowed local users to cause a denial of service (file-descriptor consumption and system crash) via a crafted application that attempts to create a circular epoll dependency.

CVE-2012-3400: Heap-based buffer overflow in the udf_load_logicalvol function in fs/udf/super.c in the Linux kernel allowed remote attackers to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted UDF filesystem.

Updated kernel packages that fix multiple security issues, address several hundred bugs, and add numerous enhancements are now available as part of the ongoing support and maintenance of Red Hat Enterprise Linux version 6. This is the fourth regular update.

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.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* A race condition was found in the way asynchronous I/O and fallocate() interacted when using the ext4 file system. A local, unprivileged user could use this flaw to expose random data from an extent whose data blocks have not yet been written, and thus contain data from a deleted file. (CVE-2012-4508, Important)

* A flaw was found in the way the vhost kernel module handled descriptors that spanned multiple regions. A privileged guest user in a KVM guest could use this flaw to crash the host or, potentially, escalate their privileges on the host. (CVE-2013-0311, Important)

* It was found that the default SCSI command filter does not accommodate commands that overlap across device classes. A privileged guest user could potentially use this flaw to write arbitrary data to a LUN that is passed-through as read-only. (CVE-2012-4542, Moderate)

* A flaw was found in the way the xen_failsafe_callback() function in the Linux kernel handled the failed iret (interrupt return) instruction notification from the Xen hypervisor. An unprivileged user in a 32-bit para-virtualized guest could use this flaw to crash the guest. (CVE-2013-0190, Moderate)

* A flaw was found in the way pmd_present() interacted with PROT_NONE memory ranges when transparent hugepages were in use. A local, unprivileged user could use this flaw to crash the system.
(CVE-2013-0309, Moderate)

* A flaw was found in the way CIPSO (Common IP Security Option) IP options were validated when set from user mode. A local user able to set CIPSO IP options on the socket could use this flaw to crash the system. (CVE-2013-0310, Moderate)

Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508, and Andrew Cooper of Citrix for reporting CVE-2013-0190. Upstream acknowledges Dmitry Monakhov as the original reporter of CVE-2012-4508. The CVE-2012-4542 issue was discovered by Paolo Bonzini of Red Hat.

This update also fixes several hundred bugs and adds enhancements.
Refer to the Red Hat Enterprise Linux 6.4 Release Notes for information on the most significant of these changes, and the Technical Notes for further information, both linked to in the References.

All Red Hat Enterprise Linux 6 users are advised to install these updated packages, which correct these issues, and fix the bugs and add the enhancements noted in the Red Hat Enterprise Linux 6.4 Release Notes and Technical Notes. The system must be rebooted for this update to take effect.

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-2507 advisory.

    - vhost: fix length for cross region descriptor (Michael S. Tsirkin) [Orabug:
    16387183] {CVE-2013-0311}
    - x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS. (Jan     Beulich) {CVE-2013-0228}
    - kmod: make __request_module() killable (Oleg Nesterov) [Orabug: 16286305]     {CVE-2012-4398}
    - kmod: introduce call_modprobe() helper (Oleg Nesterov) [Orabug: 16286305]     {CVE-2012-4398}
    - usermodehelper: implement UMH_KILLABLE (Oleg Nesterov) [Orabug: 16286305]     {CVE-2012-4398}
    - usermodehelper: introduce umh_complete(sub_info) (Oleg Nesterov) [Orabug:
    16286305] {CVE-2012-4398}
    - KVM: x86: invalid opcode oops on SET_SREGS with OSXSAVE bit set     (CVE-2012-4461) (Jerry Snitselaar) [Orabug: 16286290] {CVE-2012-4461}
    - exec: do not leave bprm->interp on stack (Kees Cook) [Orabug: 16286267]     {CVE-2012-4530}
    - exec: use -ELOOP for max recursion depth (Kees Cook) [Orabug: 16286267]     {CVE-2012-4530}
    - xen-pciback: rate limit error messages from xen_pcibk_enable_msi{,x}() (Jan     Beulich) [Orabug: 16243736] {CVE-2013-0231}
    - netback: correct netbk_tx_err to handle wrap around. (Ian Campbell) [Orabug:
    16243309] {CVE-2013-0216 CVE-2013-0217}
    - xen/netback: free already allocated memory on failure in     xen_netbk_get_requests (Ian Campbell) [Orabug: 16243309] {CVE-2013-0216     CVE-2013-0217}
    - xen/netback: don't leak pages on failure in xen_netbk_tx_check_gop. (Ian     Campbell) [Orabug: 16243309] {CVE-2013-0216 CVE-2013-0217}
    - xen: Fix stack corruption in xen_failsafe_callback for 32bit PVOPS guests.
    (Andrew Cooper) {CVE-2013-0190}
    - Fix length of buffer copied in __nfs4_get_acl_uncached (Sachin Prabhu) [Bug-     db: 14798] {CVE-2012-2375}
    - Avoid reading past buffer when calling GETACL (Sachin Prabhu) [Bug-db: 14798]     {CVE-2012-2375}
    - Avoid beyond bounds copy while caching ACL (Sachin Prabhu) [Bug-db: 14798]     {CVE-2012-2375}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
65667	Ubuntu 10.04 LTS : linux-ec2 vulnerabilities (USN-1776-1)	Nessus	Ubuntu Local Security Checks	3/24/2013	9/19/2019	medium
68852	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2013-2520)	Nessus	Oracle Linux Local Security Checks	7/12/2013	4/29/2025	medium
65171	RHEL 6 : Red Hat Enterprise Linux 6 kernel update (Important) (RHSA-2013:0496)	Nessus	Red Hat Local Security Checks	3/10/2013	4/15/2025	high
65666	Ubuntu 10.04 LTS : linux vulnerabilities (USN-1775-1)	Nessus	Ubuntu Local Security Checks	3/24/2013	9/19/2019	medium
68739	Oracle Linux 6 : kernel (ELSA-2013-0496)	Nessus	Oracle Linux Local Security Checks	7/12/2013	10/22/2024	medium
74914	openSUSE Security Update : kernel (openSUSE-SU-2013:0396-1)	Nessus	SuSE Local Security Checks	6/13/2014	1/19/2021	high
65134	CentOS 6 : kernel (CESA-2013:0496)	Nessus	CentOS Local Security Checks	3/10/2013	1/4/2021	medium
68847	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2013-2507)	Nessus	Oracle Linux Local Security Checks	7/12/2013	4/29/2025	high

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