https://bugzilla.redhat.com/show_bug.cgi?id=1198109

74293

RHSA-2016:0068

RHSA-2015:2411

RHSA-2015:2152

RHSA-2015:0864

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found where the kernel truncated the value     used to indicate the size of a buffer which it would     later become zero using an untruncated value. This can     corrupt memory outside of the original     allocation.(CVE-2017-9725)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5753 triggers the     speculative execution by performing a bounds-check     bypass. It relies on the presence of a     precisely-defined instruction sequence in the     privileged code as well as the fact that memory     accesses may cause allocation into the microprocessor's     data cache even for speculatively executed instructions     that never actually commit (retire). As a result, an     unprivileged attacker could use this flaw to cross the     syscall boundary and read privileged memory by     conducting targeted cache side-channel     attacks.(CVE-2017-5753)

  - A buffer overflow was found in the Linux kernel's     isdn_net_newslave() function in the     /drivers/isdn/i4l/isdn_net.c file. An overflow happens     when the user-controlled buffer is copied into a local     buffer of constant size using strcpy() without a length     check.(CVE-2017-12762)

  - Modern operating systems implement virtualization of     physical memory to efficiently use available system     resources and provide inter-domain protection through     access control and isolation. The L1TF issue was found     in the way the x86 microprocessor designs have     implemented speculative execution of instructions (a     commonly used performance optimization) in combination     with handling of page-faults caused by terminated     virtual to physical address resolving process. As a     result, an unprivileged attacker could use this flaw to     read privileged memory of the kernel or other processes     and/or cross guest/host boundaries to read host memory     by conducting targeted cache side-channel     attacks.(CVE-2018-3646)

  - An industry-wide issue was found in the way many modern     microprocessor designs have implemented speculative     execution of instructions (a commonly used performance     optimization). There are three primary variants of the     issue which differ in the way the speculative execution     can be exploited. Variant CVE-2017-5715 triggers the     speculative execution by utilizing branch target     injection. It relies on the presence of a     precisely-defined instruction sequence in the     privileged code as well as the fact that memory     accesses may cause allocation into the microprocessor's     data cache even for speculatively executed instructions     that never actually commit (retire). As a result, an     unprivileged attacker could use this flaw to cross the     syscall and guest/host boundaries and read privileged     memory by conducting targeted cache side-channel     attacks.(CVE-2017-5715)

  - Modern operating systems implement virtualization of     physical memory to efficiently use available system     resources and provide inter-domain protection through     access control and isolation. The L1TF issue was found     in the way the x86 microprocessor designs have     implemented speculative execution of instructions (a     commonly used performance optimization) in combination     with handling of page-faults caused by terminated     virtual to physical address resolving process. As a     result, an unprivileged attacker could use this flaw to     read privileged memory of the kernel or other processes     and/or cross guest/host boundaries to read host memory     by conducting targeted cache side-channel     attacks.(CVE-2018-3620)

  - In hid_debug_events_read of drivers/hid/hid-debug.c,     there is a possible out of bounds write due to a     missing bounds check. This could lead to local     escalation of privilege with System execution     privileges needed. User interaction is not needed for     exploitation. Product: Android Versions: Android kernel     Android ID: A-71361580.(CVE-2018-9516)

  - Systems with microprocessors utilizing speculative     execution and speculative execution of memory reads     before the addresses of all prior memory writes are     known may allow unauthorized disclosure of information     to an attacker with local user access via a     side-channel analysis, aka Speculative Store Bypass     (SSB), Variant 4.(CVE-2018-3639)

  - It was found that the Linux kernel memory resource     controller's (memcg) handling of OOM (out of memory)     conditions could lead to deadlocks. An attacker able to     continuously spawn new processes within a single     memory-constrained cgroup during an OOM event could use     this flaw to lock up the system.(CVE-2014-8171)

  - In sk_clone_lock of sock.c, there is a possible memory     corruption due to type confusion. This could lead to     local escalation of privilege with no additional     execution privileges needed. User interaction is not     needed for exploitation. Product: Android. Versions:
    Android kernel. Android ID: A-113509306. References:
    Upstream kernel.(CVE-2018-9568)

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

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details.

Updated kernel-rt packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security 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-rt packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the way the Linux kernel's file system implementation handled rename operations in which the source was inside and the destination was outside of a bind mount. A privileged user inside a container could use this flaw to escape the bind mount and, potentially, escalate their privileges on the system.
(CVE-2015-2925, Important)

* A race condition flaw was found in the way the Linux kernel's IPC subsystem initialized certain fields in an IPC object structure that were later used for permission checking before inserting the object into a globally visible list. A local, unprivileged user could potentially use this flaw to elevate their privileges on the system.
(CVE-2015-7613, Important)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker able to continuously spawn new processes within a single memory-constrained cgroup during an OOM event could use this flaw to lock up the system. (CVE-2014-8171, Moderate)

* A race condition flaw was found between the chown and execve system calls. When changing the owner of a setuid user binary to root, the race condition could momentarily make the binary setuid root. A local, unprivileged user could potentially use this flaw to escalate their privileges on the system. (CVE-2015-3339, Moderate)

* A flaw was discovered in the way the Linux kernel's TTY subsystem handled the tty shutdown phase. A local, unprivileged user could use this flaw to cause a denial of service on the system by holding a reference to the ldisc lock during tty shutdown, causing a deadlock.
(CVE-2015-4170, Moderate)

* A NULL pointer dereference flaw was found in the SCTP implementation. A local user could use this flaw to cause a denial of service on the system by triggering a kernel panic when creating multiple sockets in parallel while the system did not have the SCTP module loaded. (CVE-2015-5283, Moderate)

* A flaw was found in the way the Linux kernel's Crypto subsystem handled automatic loading of kernel modules. A local user could use this flaw to load any installed kernel module, and thus increase the attack surface of the running kernel. (CVE-2013-7421, CVE-2014-9644, Low)

* An information leak flaw was found in the way the Linux kernel changed certain segment registers and thread-local storage (TLS) during a context switch. A local, unprivileged user could use this flaw to leak the user space TLS base address of an arbitrary process.
(CVE-2014-9419, Low)

* A flaw was found in the way the Linux kernel handled the securelevel functionality after performing a kexec operation. A local attacker could use this flaw to bypass the security mechanism of the securelevel/secureboot combination. (CVE-2015-7837, Low)

Red Hat would like to thank Linn Crosetto of HP for reporting the CVE-2015-7837 issue. The CVE-2015-5283 issue was discovered by Ji Jianwen from Red Hat engineering.

The kernel-rt packages have been upgraded to version 3.10.0-326.rt56.204, which provides a number of bug fixes and enhancements. (BZ#1201915, BZ#1211724)

This update also fixes several bugs and adds multiple enhancements.
Refer to the following Red Hat Knowledgebase article for information on the most significant of these changes :

https://access.redhat.com/articles/2055783

All kernel-rt users are advised to upgrade to these updated packages, which correct these issues and add these enhancements. The system must be rebooted for this update to take effect.

Updated kernel-rt packages that fix one security issue are now available for Red Hat Enterprise MRG 2.

Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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

* A use-after-free flaw was found in the way the Linux kernel's key management subsystem handled keyring object reference counting in certain error path of the join_session_keyring() function. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2016-0728, Important)

Red Hat would like to thank the Perception Point research team for reporting this issue.

All kernel-rt users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The system must be rebooted for this update to take effect.

* A flaw was found in the way the Linux kernel's file system implementation handled rename operations in which the source was inside and the destination was outside of a bind mount. A privileged user inside a container could use this flaw to escape the bind mount and, potentially, escalate their privileges on the system.
(CVE-2015-2925, Important)

* A race condition flaw was found in the way the Linux kernel's IPC subsystem initialized certain fields in an IPC object structure that were later used for permission checking before inserting the object into a globally visible list. A local, unprivileged user could potentially use this flaw to elevate their privileges on the system.
(CVE-2015-7613, Important)

* It was found that reporting emulation failures to user space could lead to either a local (CVE-2014-7842) or a L2->L1 (CVE-2010-5313) denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. (CVE-2010-5313, CVE-2014-7842, Moderate)

* A flaw was found in the way the Linux kernel's KVM subsystem handled non-canonical addresses when emulating instructions that change the RIP (for example, branches or calls). A guest user with access to an I/O or MMIO region could use this flaw to crash the guest.
(CVE-2014-3647, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker could use this flaw to lock up the system.
(CVE-2014-8171, Moderate)

* A race condition flaw was found between the chown and execve system calls. A local, unprivileged user could potentially use this flaw to escalate their privileges on the system. (CVE-2015-3339, Moderate)

* A flaw was discovered in the way the Linux kernel's TTY subsystem handled the tty shutdown phase. A local, unprivileged user could use this flaw to cause a denial of service on the system. (CVE-2015-4170, Moderate)

* A NULL pointer dereference flaw was found in the SCTP implementation. A local user could use this flaw to cause a denial of service on the system by triggering a kernel panic when creating multiple sockets in parallel while the system did not have the SCTP module loaded. (CVE-2015-5283, Moderate)

* A flaw was found in the way the Linux kernel's perf subsystem retrieved userlevel stack traces on PowerPC systems. A local, unprivileged user could use this flaw to cause a denial of service on the system. (CVE-2015-6526, Moderate)

* A flaw was found in the way the Linux kernel's Crypto subsystem handled automatic loading of kernel modules. A local user could use this flaw to load any installed kernel module, and thus increase the attack surface of the running kernel. (CVE-2013-7421, CVE-2014-9644, Low)

* An information leak flaw was found in the way the Linux kernel changed certain segment registers and thread-local storage (TLS) during a context switch. A local, unprivileged user could use this flaw to leak the user space TLS base address of an arbitrary process.
(CVE-2014-9419, Low)

* It was found that the Linux kernel KVM subsystem's sysenter instruction emulation was not sufficient. An unprivileged guest user could use this flaw to escalate their privileges by tricking the hypervisor to emulate a SYSENTER instruction in 16-bit mode, if the guest OS did not initialize the SYSENTER model-specific registers (MSRs). Note: Certified guest operating systems for Scientific Linux with KVM do initialize the SYSENTER MSRs and are thus not vulnerable to this issue when running on a KVM hypervisor. (CVE-2015-0239, Low)

* A flaw was found in the way the Linux kernel handled the securelevel functionality after performing a kexec operation. A local attacker could use this flaw to bypass the security mechanism of the securelevel/secureboot combination. (CVE-2015-7837, Low)

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 7. This is the second regular update.

Red Hat Product Security 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.

* A flaw was found in the way the Linux kernel's file system implementation handled rename operations in which the source was inside and the destination was outside of a bind mount. A privileged user inside a container could use this flaw to escape the bind mount and, potentially, escalate their privileges on the system.
(CVE-2015-2925, Important)

* A race condition flaw was found in the way the Linux kernel's IPC subsystem initialized certain fields in an IPC object structure that were later used for permission checking before inserting the object into a globally visible list. A local, unprivileged user could potentially use this flaw to elevate their privileges on the system.
(CVE-2015-7613, Important)

* It was found that reporting emulation failures to user space could lead to either a local (CVE-2014-7842) or a L2->L1 (CVE-2010-5313) denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. (CVE-2010-5313, CVE-2014-7842, Moderate)

* A flaw was found in the way the Linux kernel's KVM subsystem handled non-canonical addresses when emulating instructions that change the RIP (for example, branches or calls). A guest user with access to an I/O or MMIO region could use this flaw to crash the guest.
(CVE-2014-3647, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker could use this flaw to lock up the system.
(CVE-2014-8171, Moderate)

* A race condition flaw was found between the chown and execve system calls. A local, unprivileged user could potentially use this flaw to escalate their privileges on the system. (CVE-2015-3339, Moderate)

* A flaw was discovered in the way the Linux kernel's TTY subsystem handled the tty shutdown phase. A local, unprivileged user could use this flaw to cause a denial of service on the system. (CVE-2015-4170, Moderate)

* A NULL pointer dereference flaw was found in the SCTP implementation. A local user could use this flaw to cause a denial of service on the system by triggering a kernel panic when creating multiple sockets in parallel while the system did not have the SCTP module loaded. (CVE-2015-5283, Moderate)

* A flaw was found in the way the Linux kernel's perf subsystem retrieved userlevel stack traces on PowerPC systems. A local, unprivileged user could use this flaw to cause a denial of service on the system. (CVE-2015-6526, Moderate)

* A flaw was found in the way the Linux kernel's Crypto subsystem handled automatic loading of kernel modules. A local user could use this flaw to load any installed kernel module, and thus increase the attack surface of the running kernel. (CVE-2013-7421, CVE-2014-9644, Low)

* An information leak flaw was found in the way the Linux kernel changed certain segment registers and thread-local storage (TLS) during a context switch. A local, unprivileged user could use this flaw to leak the user space TLS base address of an arbitrary process.
(CVE-2014-9419, Low)

* It was found that the Linux kernel KVM subsystem's sysenter instruction emulation was not sufficient. An unprivileged guest user could use this flaw to escalate their privileges by tricking the hypervisor to emulate a SYSENTER instruction in 16-bit mode, if the guest OS did not initialize the SYSENTER model-specific registers (MSRs). Note: Certified guest operating systems for Red Hat Enterprise Linux with KVM do initialize the SYSENTER MSRs and are thus not vulnerable to this issue when running on a KVM hypervisor.
(CVE-2015-0239, Low)

* A flaw was found in the way the Linux kernel handled the securelevel functionality after performing a kexec operation. A local attacker could use this flaw to bypass the security mechanism of the securelevel/secureboot combination. (CVE-2015-7837, Low)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-2152 advisory.

  - The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a     bind system call for an AF_ALG socket with a module name in the salg_name field, a different vulnerability     than CVE-2014-9644. (CVE-2013-7421)

  - The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a     bind system call for an AF_ALG socket with a parenthesized module template expression in the salg_name     field, as demonstrated by the vfat(aes) expression, a different vulnerability than CVE-2013-7421.
    (CVE-2014-9644)

  - The memory resource controller (aka memcg) in the Linux kernel allows local users to cause a denial of     service (deadlock) by spawning new processes within a memory-constrained cgroup. (CVE-2014-8171)

  - The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not     ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which     makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that     reads a TLS base address. (CVE-2014-9419)

  - The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS     lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of     service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER     instruction. (CVE-2015-0239)

  - Race condition in the prepare_binprm function in fs/exec.c in the Linux kernel before 3.19.6 allows local     users to gain privileges by executing a setuid program at a time instant when a chown to root is in     progress, and the ownership is changed but the setuid bit is not yet stripped. (CVE-2015-3339)

  - Race condition in arch/x86/kvm/x86.c in the Linux kernel before 2.6.38 allows L2 guest OS users to cause a     denial of service (L1 guest OS crash) via a crafted instruction that triggers an L2 emulation failure     report, a similar issue to CVE-2014-7842. (CVE-2010-5313)

  - arch/x86/kvm/emulate.c in the KVM subsystem in the Linux kernel through 3.17.2 does not properly perform     RIP changes, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted     application. (CVE-2014-3647)

  - Race condition in arch/x86/kvm/x86.c in the Linux kernel before 3.17.4 allows guest OS users to cause a     denial of service (guest OS crash) via a crafted application that performs an MMIO transaction or a PIO     transaction to trigger a guest userspace emulation error report, a similar issue to CVE-2010-5313.
    (CVE-2014-7842)

  - The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename     actions inside a bind mount, which allows local users to bypass an intended container protection mechanism     by renaming a directory, related to a double-chroot attack. (CVE-2015-2925)

  - Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before     3.13-rc4-next-20131218 allows local users to cause a denial of service (ldsem_down_read and     ldsem_down_write deadlock) by establishing a new tty thread during shutdown of a previous tty thread.
    (CVE-2015-4170)

  - The sctp_init function in net/sctp/protocol.c in the Linux kernel before 4.2.3 has an incorrect sequence     of protocol-initialization steps, which allows local users to cause a denial of service (panic or memory     corruption) by creating SCTP sockets before all of the steps have finished. (CVE-2015-5283)

  - The perf_callchain_user_64 function in arch/powerpc/perf/callchain.c in the Linux kernel before 4.0.2 on     ppc64 platforms allows local users to cause a denial of service (infinite loop) via a deep 64-bit     userspace backtrace. (CVE-2015-6526)

  - Race condition in the IPC object implementation in the Linux kernel through 4.2.3 allows local users to     gain privileges by triggering an ipc_addid call that leads to uid and gid comparisons against     uninitialized data, related to msg.c, shm.c, and util.c. (CVE-2015-7613)

  - The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted     with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions     by leveraging improper handling of secure_boot flag across kexec reboot. (CVE-2015-7837)

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

The remote OracleVM system is missing necessary patches to address critical security updates in kernel-uek.

The remote Oracle Linux 6 / 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2015-3064 advisory.

  - The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other     category, aka a negative groups issue, related to kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c. (CVE-2014-8989)

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

The remote OracleVM system is missing necessary patches to address critical security updates :

  - crypto: aesni

  - fix memory usage in GCM decryption (Stephan Mueller)     [Orabug: 21077385] (CVE-2015-3331)

  - xen/pciback: Don't disable PCI_COMMAND on PCI device     reset. (Konrad Rzeszutek Wilk) [Orabug: 20807438]     (CVE-2015-2150)

  - xen-blkfront: fix accounting of reqs when migrating     (Roger Pau Monne) [Orabug: 20860817]

  - Doc/cpu-hotplug: Specify race-free way to register CPU     hotplug callbacks (Srivatsa S. Bhat) [Orabug: 20917697]

  - net/iucv/iucv.c: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - net/core/flow.c: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - mm, vmstat: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697] 

  - profile: Fix CPU hotplug callback registration (Srivatsa     S. Bhat) 

  - trace, ring-buffer: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - hwmon, via-cputemp: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) 

  - hwmon, coretemp: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - octeon, watchdog: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - oprofile, nmi-timer: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - intel-idle: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - drivers/base/topology.c: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - acpi-cpufreq: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - scsi, fcoe: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697] 

  - scsi, bnx2fc: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - scsi, bnx2i: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - arm64, debug-monitors: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - arm64, hw_breakpoint.c: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, kvm: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, oprofile, nmi: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, pci, amd-bus: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, hpet: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, intel, cacheinfo: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, amd, ibs: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, therm_throt.c: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, mce: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, intel, uncore: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, vsyscall: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, cpuid: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - x86, msr: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - powerpc, sysfs: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) 

  - sparc, sysfs: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - s390, smp: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - s390, cacheinfo: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) 

  - arm, hw-breakpoint: Fix CPU hotplug callback     registration (Srivatsa S. Bhat) [Orabug: 20917697]

  - ia64, err-inject: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - ia64, topology: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - ia64, palinfo: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - CPU hotplug, perf: Fix CPU hotplug callback registration     (Srivatsa S. Bhat) [Orabug: 20917697]

  - CPU hotplug: Provide lockless versions of callback     registration functions (Srivatsa S. Bhat) [Orabug:
    20917697]

  - isofs: Fix unchecked printing of ER records (Jan Kara)     [Orabug: 20930551] (CVE-2014-9584)

  - KEYS: close race between key lookup and freeing (Sasha     Levin) [Orabug: 20930548] (CVE-2014-9529)     (CVE-2014-9529)

  - mm: memcg: do not allow task about to OOM kill to bypass     the limit (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: do not declare OOM from __GFP_NOFAIL     allocations (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - fs: buffer: move allocation failure loop into the     allocator (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: handle non-error OOM situations more     gracefully (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: do not trap chargers with full callstack on     OOM (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - mm: memcg: rework and document OOM waiting and wakeup     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - mm: memcg: enable memcg OOM killer only for user faults     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - x86: finish user fault error path with fatal signal     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - arch: mm: pass userspace fault flag to generic fault     handler (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - selinux: Permit bounded transitions under NO_NEW_PRIVS     or NOSUID. (Stephen Smalley) [Orabug: 20930501]     (CVE-2014-3215)

  - IB/core: Prevent integer overflow in ib_umem_get address     arithmetic (Shachar Raindel) [Orabug: 20799875]     (CVE-2014-8159) (CVE-2014-8159)

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3035 advisory.

  - Xen 3.3.x through 4.5.x and the Linux kernel through 3.19.1 do not properly restrict access to PCI command     registers, which might allow local guest OS users to cause a denial of service (non-maskable interrupt and     host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing     the device, which triggers an Unsupported Request (UR) response. (CVE-2015-2150)

  - The __driver_rfc4106_decrypt function in arch/x86/crypto/aesni-intel_glue.c in the Linux kernel before     3.19.3 does not properly determine the memory locations used for encrypted data, which allows context-     dependent attackers to cause a denial of service (buffer overflow and system crash) or possibly execute     arbitrary code by triggering a crypto API call, as demonstrated by use of a libkcapi test program with an     AF_ALG(aead) socket. (CVE-2015-3331)

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

The remote OracleVM system is missing necessary patches to address critical security updates :

  - isofs: Fix unchecked printing of ER records (Jan Kara)     [Orabug: 20930551] (CVE-2014-9584)

  - KEYS: close race between key lookup and freeing (Sasha     Levin) [Orabug: 20930548] (CVE-2014-9529)     (CVE-2014-9529)

  - mm: memcg: do not allow task about to OOM kill to bypass     the limit (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: do not declare OOM from __GFP_NOFAIL     allocations (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - fs: buffer: move allocation failure loop into the     allocator (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: handle non-error OOM situations more     gracefully (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - mm: memcg: do not trap chargers with full callstack on     OOM (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - mm: memcg: rework and document OOM waiting and wakeup     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - mm: memcg: enable memcg OOM killer only for user faults     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - x86: finish user fault error path with fatal signal     (Johannes Weiner) [Orabug: 20930539] (CVE-2014-8171)

  - arch: mm: pass userspace fault flag to generic fault     handler (Johannes Weiner) [Orabug: 20930539]     (CVE-2014-8171)

  - selinux: Permit bounded transitions under NO_NEW_PRIVS     or NOSUID. (Stephen Smalley) [Orabug: 20930501]     (CVE-2014-3215)

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3032 advisory.

  - seunshare in policycoreutils 2.2.5 is owned by root with 4755 permissions, and executes programs in a way     that changes the relationship between the setuid system call and the getresuid saved set-user-ID value,     which makes it easier for local users to gain privileges by leveraging a program that mistakenly expected     that it could permanently drop privileges. (CVE-2014-3215)

  - The memory resource controller (aka memcg) in the Linux kernel allows local users to cause a denial of     service (deadlock) by spawning new processes within a memory-constrained cgroup. (CVE-2014-8171)

  - Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2     allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified     other impact via keyctl commands that trigger access to a key structure member during garbage collection     of a key. (CVE-2014-9529)

  - The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not     validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to     obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

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

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security 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.

* A flaw was found in the way seunshare, a utility for running executables under a different security context, used the capng_lock functionality of the libcap-ng library. The subsequent invocation of suid root binaries that relied on the fact that the setuid() system call, among others, also sets the saved set-user-ID when dropping the binaries' process privileges, could allow a local, unprivileged user to potentially escalate their privileges on the system. Note: the fix for this issue is the kernel part of the overall fix, and introduces the PR_SET_NO_NEW_PRIVS functionality and the related SELinux exec transitions support. (CVE-2014-3215, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2015-1421, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.
(CVE-2014-3690, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker able to continuously spawn new processes within a single memory-constrained cgroup during an OOM event could use this flaw to lock up the system. (CVE-2014-8171, Moderate)

* A race condition flaw was found in the way the Linux kernel keys management subsystem performed key garbage collection. A local attacker could attempt accessing a key while it was being garbage collected, which would cause the system to crash. (CVE-2014-9529, Moderate)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

* An information leak flaw was found in the way the Linux kernel's ISO9660 file system implementation accessed data on an ISO9660 image with RockRidge Extension Reference (ER) records. An attacker with physical access to the system could use this flaw to disclose up to 255 bytes of kernel memory. (CVE-2014-9584, Low)

Red Hat would like to thank Andy Lutomirski for reporting CVE-2014-3215 and CVE-2014-3690, Robert Swiecki for reporting CVE-2014-7825 and CVE-2014-7826, and Carl Henrik Lunde for reporting CVE-2014-9584. The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.

This update also fixes several bugs. Documentation for these changes is available from the Technical Notes document linked to in the References section.

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

* A flaw was found in the way seunshare, a utility for running executables under a different security context, used the capng_lock functionality of the libcap-ng library. The subsequent invocation of suid root binaries that relied on the fact that the setuid() system call, among others, also sets the saved set-user-ID when dropping the binaries' process privileges, could allow a local, unprivileged user to potentially escalate their privileges on the system. Note: the fix for this issue is the kernel part of the overall fix, and introduces the PR_SET_NO_NEW_PRIVS functionality and the related SELinux exec transitions support. (CVE-2014-3215, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2015-1421, Important)

* It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.
(CVE-2014-3690, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system.
(CVE-2014-7825, Moderate)

* An out-of-bounds memory access flaw was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
(CVE-2014-7826, Moderate)

* It was found that the Linux kernel memory resource controller's (memcg) handling of OOM (out of memory) conditions could lead to deadlocks. An attacker able to continuously spawn new processes within a single memory- constrained cgroup during an OOM event could use this flaw to lock up the system. (CVE-2014-8171, Moderate)

* A race condition flaw was found in the way the Linux kernel keys management subsystem performed key garbage collection. A local attacker could attempt accessing a key while it was being garbage collected, which would cause the system to crash. (CVE-2014-9529, Moderate)

* A stack-based buffer overflow flaw was found in the TechnoTrend/Hauppauge DEC USB device driver. A local user with write access to the corresponding device could use this flaw to crash the kernel or, potentially, elevate their privileges on the system.
(CVE-2014-8884, Low)

* An information leak flaw was found in the way the Linux kernel's ISO9660 file system implementation accessed data on an ISO9660 image with RockRidge Extension Reference (ER) records. An attacker with physical access to the system could use this flaw to disclose up to 255 bytes of kernel memory. (CVE-2014-9584, Low)

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

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0864 advisory.

  - arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not     ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS     users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm     access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU. (CVE-2014-3690)

  - kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall     numbers during use of the perf subsystem, which allows local users to cause a denial of service (out-of-     bounds read and OOPS) or bypass the ASLR protection mechanism via a crafted application. (CVE-2014-7825)

  - kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall     numbers during use of the ftrace subsystem, which allows local users to gain privileges or cause a denial     of service (invalid pointer dereference) via a crafted application. (CVE-2014-7826)

  - Stack-based buffer overflow in the ttusbdecfe_dvbs_diseqc_send_master_cmd function in     drivers/media/usb/ttusb-dec/ttusbdecfe.c in the Linux kernel before 3.17.4 allows local users to cause a     denial of service (system crash) or possibly gain privileges via a large message length in an ioctl call.
    (CVE-2014-8884)

  - Use-after-free vulnerability in the sctp_assoc_update function in net/sctp/associola.c in the Linux kernel     before 3.18.8 allows remote attackers to cause a denial of service (slab corruption and panic) or possibly     have unspecified other impact by triggering an INIT collision that leads to improper handling of shared-     key data. (CVE-2015-1421)

  - seunshare in policycoreutils 2.2.5 is owned by root with 4755 permissions, and executes programs in a way     that changes the relationship between the setuid system call and the getresuid saved set-user-ID value,     which makes it easier for local users to gain privileges by leveraging a program that mistakenly expected     that it could permanently drop privileges. (CVE-2014-3215)

  - The memory resource controller (aka memcg) in the Linux kernel allows local users to cause a denial of     service (deadlock) by spawning new processes within a memory-constrained cgroup. (CVE-2014-8171)

  - Race condition in the key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 3.18.2     allows local users to cause a denial of service (memory corruption or panic) or possibly have unspecified     other impact via keyctl commands that trigger access to a key structure member during garbage collection     of a key. (CVE-2014-9529)

  - The parse_rock_ridge_inode_internal function in fs/isofs/rock.c in the Linux kernel before 3.18.2 does not     validate a length value in the Extensions Reference (ER) System Use Field, which allows local users to     obtain sensitive information from kernel memory via a crafted iso9660 image. (CVE-2014-9584)

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

ID	Name	Product	Family	Severity
124836	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1515)	Nessus	Huawei Local Security Checks	critical
99163	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	critical
88571	RHEL 7 : kernel-rt (RHSA-2015:2411)	Nessus	Red Hat Local Security Checks	medium
88405	RHEL 6 : MRG (RHSA-2016:0068)	Nessus	Red Hat Local Security Checks	high
87559	Scientific Linux Security Update : kernel on SL7.x x86_64 (20151119)	Nessus	Scientific Linux Local Security Checks	medium
87135	CentOS 7 : kernel (CESA-2015:2152)	Nessus	CentOS Local Security Checks	high
87090	Oracle Linux 7 : kernel (ELSA-2015-2152)	Nessus	Oracle Linux Local Security Checks	high
86972	RHEL 7 : kernel (RHSA-2015:2152)	Nessus	Red Hat Local Security Checks	high
85188	OracleVM 3.3 : kernel-uek (OVMSA-2015-0109)	Nessus	OracleVM Local Security Checks	critical
85177	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3064)	Nessus	Oracle Linux Local Security Checks	medium
83485	OracleVM 3.3 : kernel-uek (OVMSA-2015-0060)	Nessus	OracleVM Local Security Checks	medium
83448	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3035)	Nessus	Oracle Linux Local Security Checks	medium
83108	OracleVM 3.3 : kernel-uek (OVMSA-2015-0056)	Nessus	OracleVM Local Security Checks	medium
83045	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3032)	Nessus	Oracle Linux Local Security Checks	medium
82999	CentOS 6 : kernel (CESA-2015:0864)	Nessus	CentOS Local Security Checks	high
82988	Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20150421)	Nessus	Scientific Linux Local Security Checks	high
82985	RHEL 6 : kernel (RHSA-2015:0864)	Nessus	Red Hat Local Security Checks	high
82981	Oracle Linux 6 : kernel (ELSA-2015-0864)	Nessus	Oracle Linux Local Security Checks	high

CVE-2014-8171

medium

New! CVE Severity Now Using CVSS v3

Description

References

Details

Risk Information

CVSS v2

CVSS v3

Vulnerable Software

Configuration 1

Configuration 2

Tenable Plugins

critical

critical

medium

high

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critical

medium

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