The kvm_vm_ioctl_check_extension function in arch/powerpc/kvm/powerpc.c in the Linux kernel before 4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) via a KVM_CHECK_EXTENSION KVM_CAP_PPC_HTM ioctl call to /dev/kvm.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - A memory corruption flaw was found in the way the USB     ConnectTech WhiteHEAT serial driver processed     completion commands sent via USB Request Blocks     buffers. An attacker with physical access to the system     could use this flaw to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2014-3185i1/4%0

  - Use-after-free vulnerability in the msm_set_crop     function in drivers/media/video/msm/msm_camera.c in the     MSM-Camera driver for the Linux kernel 3.x, as used in     Qualcomm Innovation Center (QuIC) Android contributions     for MSM devices and other products, allows attackers to     gain privileges or cause a denial of service (memory     corruption) via an application that makes a crafted     ioctl call.(CVE-2015-0568i1/4%0

  - The vivid_fb_ioctl function in     drivers/media/platform/vivid/vivid-osd.c in the Linux     kernel through 4.3.3 does not initialize a certain     structure member, which allows local users to obtain     sensitive information from kernel memory via a crafted     application.(CVE-2015-7884i1/4%0

  - The usb_get_bos_descriptor function in     drivers/usb/core/config.c in the Linux kernel can allow     a local users to cause a denial of service     (out-of-bounds read and system crash) or possibly have     unspecified other impact via a crafted USB     device.(CVE-2017-16535i1/4%0

  - The ACPI parsing functionality in the Linux kernel does     not flush the node and node_ext caches which causes a     kernel stack dump. This allows local users to obtain     sensitive information from kernel memory and use this     information to bypass the KASLR protection mechanism by     creating and applying crafted ACPI     table.(CVE-2017-13694i1/4%0

  - The is_ashmem_file function in     drivers/staging/android/ashmem.c in a certain Qualcomm     Innovation Center (QuIC) Android patch for the Linux     kernel 3.x mishandles pointer validation within the     KGSL Linux Graphics Module, which allows attackers to     bypass intended access restrictions by using the     /ashmem string as the dentry name.(CVE-2016-5340i1/4%0

  - It was found that the Linux kernel did not properly     account file descriptors passed over the unix socket     against the process limit. A local user could use this     flaw to exhaust all available memory on the     system.(CVE-2013-4312i1/4%0

  - Kernel memory corruption due to a buffer overflow was     found in brcmf_cfg80211_mgmt_tx() function in Linux     kernels from v3.9-rc1 to v4.13-rc1. The vulnerability     can be triggered by sending a crafted NL80211_CMD_FRAME     packet via netlink. This flaw is unlikely to be     triggered remotely as certain userspace code is needed     for this. An unprivileged local user could use this     flaw to induce kernel memory corruption on the system,     leading to a crash. Due to the nature of the flaw,     privilege escalation cannot be fully ruled out,     although it is unlikely.(CVE-2017-7541i1/4%0

  - A flaw in the netback module allowed frontends to     control mapping of requests to request queues. An     attacker can change this mapping by requesting invalid     mapping requests allowing the (usually privileged)     backend to access out-of-bounds memory access for     reading and writing.(CVE-2018-15471i1/4%0

  - A buffer overflow vulnerability due to a lack of input     filtering of incoming fragmented datagrams was found in     the IP-over-1394 driver firewire-net in a fragment     handling code in the Linux kernel. The vulnerability     exists since firewire supported IPv4, i.e. since     version 2.6.31 (year 2009) till version v4.9-rc4. A     maliciously formed fragment with a respectively large     datagram offset would cause a memcpy() past the     datagram buffer, which would cause a system panic or     possible arbitrary code execution.The flaw requires     firewire-net module to be loaded and is remotely     exploitable from connected firewire devices, but not     over a local network.(CVE-2016-8633i1/4%0

  - It was found that the Linux kernel can hit a BUG_ON()     statement in the __xfs_get_blocks() in the     fs/xfs/xfs_aops.c because of a race condition between     direct and memory-mapped I/O associated with a hole in     a file that is handled with BUG_ON() instead of an I/O     failure. This allows a local unprivileged attacker to     cause a system crash and a denial of     service.(CVE-2016-10741i1/4%0

  - A vulnerability was found in the Linux kernel. The     pointer to the netlink socket attribute is not checked,     which could cause a null pointer dereference when     parsing the nested attributes in function     tipc_nl_publ_dump(). This allows local users to cause a     DoS.(CVE-2016-4951i1/4%0

  - It was reported that with Linux kernel, earlier than     version v4.10-rc8, an application may trigger a BUG_ON     in sctp_wait_for_sndbuf if the socket tx buffer is     full, a thread is waiting on it to queue more data, and     meanwhile another thread peels off the association     being used by the first thread.(CVE-2017-5986i1/4%0

  - The kvm_vm_ioctl_check_extension function in     arch/powerpc/kvm/powerpc.c in the Linux kernel before     4.13.11 allows local users to cause a denial of service     (NULL pointer dereference and system crash) via a     KVM_CHECK_EXTENSION KVM_CAP_PPC_HTM ioctl call to     /dev/kvm.(CVE-2017-15306i1/4%0

  - A flaw was found in the way the Linux kernel's 32-bit     emulation implementation handled forking or closing of     a task with an 'int80' entry. A local user could     potentially use this flaw to escalate their privileges     on the system.(CVE-2015-2830i1/4%0

  - A flaw was found in the way the Linux kernel's SCTP     implementation validated INIT chunks when performing     Address Configuration Change (ASCONF). A remote     attacker could use this flaw to crash the system by     sending a specially crafted SCTP packet to trigger a     NULL pointer dereference on the     system.(CVE-2014-7841i1/4%0

  - A race condition issue leading to a use-after-free flaw     was found in the way the raw packet sockets are     implemented in the Linux kernel networking subsystem     handling synchronization. A local user able to open a     raw packet socket (requires the CAP_NET_RAW capability)     can use this issue to crash the     system.(CVE-2017-1000111)

  - A flaw was found in the way the Linux kernel performed     forking inside of a transaction. A local, unprivileged     user on a PowerPC system that supports transactional     memory could use this flaw to crash the     system.(CVE-2014-2673i1/4%0

  - The hashbin_delete function in net/irda/irqueue.c in     the Linux kernel improperly manages lock dropping,     which allows local users to cause a denial of service     (deadlock) via crafted operations on IrDA     devices.(CVE-2017-6348i1/4%0

  - An out-of-bounds flaw was found in the kernel, where     the length of the sockaddr parameter was not checked in     the pptp_bind() and pptp_connect() functions. As a     result, more kernel memory was copied out than     required, leaking information from the kernel stack     (including kernel addresses). A local system user could     exploit this flaw to bypass kernel ASLR or leak other     information.(CVE-2015-8569i1/4%0

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 Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:0654 advisory.

    The kernel-alt packages provide the Linux kernel version 4.x.

    The following packages have been upgraded to a later upstream version: kernel-alt (4.14.0). (BZ#1492717)

    Security Fix(es):

    * 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, Important, ARM)

    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, Important, ARM)

    Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution     of instruction permission faults, exception generation triggered by a faulting access is suppressed until     the retirement of the whole instruction block. In a combination with the fact that memory accesses may     populate the cache even when the block is being dropped and never committed (executed), an unprivileged     local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache     side-channel attacks. (CVE-2017-5754, Important, ARM)

    * kernel: memory leak when merging buffers in SCSI IO vectors (CVE-2017-12190, Moderate)

    * kernel: net: double-free and memory corruption in get_net_ns_by_id() (CVE-2017-15129, Moderate)

    * kernel: Incorrect updates of uninstantiated keys crash the kernel (CVE-2017-15299, Moderate)

    * kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access     to systemwide nfnl_cthelper_list structure (CVE-2017-17448, Moderate)

    * kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe     systemwide activity (CVE-2017-17449, Moderate)

    * kernel: Arbitrary stack overwrite causing oops via crafted signal frame (CVE-2017-1000255, Moderate)

    * kernel: Stack information leak in the EFS element (CVE-2017-1000410, Moderate)

    * kernel: Race condition in sound system can lead to denial of service (CVE-2018-1000004, Moderate)

    * kernel: Buffer overflow in mp_override_legacy_irq() (CVE-2017-11473, Low)

    * kernel: Integer overflow in futex.c:futux_requeue can lead to denial of service or unspecified impact     (CVE-2018-6927, Low)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Google Project Zero for reporting CVE-2017-5715, CVE-2017-5753, and     CVE-2017-5754; Vitaly Mayatskih for reporting CVE-2017-12190; Kirill Tkhai for reporting CVE-2017-15129;
    Michael Ellerman, Gustavo Romero, Breno Leitao, Paul Mackerras, and Cyril Bur for reporting     CVE-2017-1000255; and Armis Labs for reporting CVE-2017-1000410.

    Additional Changes:

    See the Red Hat Enterprise Linux 7.5 Release Notes linked from References.

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 Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3507-2 advisory.

    Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in     the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2017-16939)

    It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages.
    A local attacker could use this to cause a denial of service (application crashes) or possibly gain     administrative privileges. (CVE-2017-1000405)

    Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux     kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a     denial of service (system crash). (CVE-2017-12193)

    Eric Biggers discovered that the key management subsystem in the Linux kernel did not properly restrict     adding a key that already exists but is uninstantiated. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2017-15299)

    It was discovered that a null pointer dereference error existed in the PowerPC KVM implementation in the     Linux kernel. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2017-15306)

    Eric Biggers discovered a race condition in the key management subsystem of the Linux kernel around keys     in a negative state. A local attacker could use this to cause a denial of service (system crash) or     possibly execute arbitrary code. (CVE-2017-15951)

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

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

Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages. A local attacker could use this to cause a denial of service (application crashes) or possibly gain administrative privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-12193)

Eric Biggers discovered that the key management subsystem in the Linux kernel did not properly restrict adding a key that already exists but is uninstantiated. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-15299)

It was discovered that a NULL pointer dereference error existed in the PowerPC KVM implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-15306)

Eric Biggers discovered a race condition in the key management subsystem of the Linux kernel around keys in a negative state. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15951)

Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB BOS metadata. A physically proximate attacker could use this to cause a denial of service (system crash).
(CVE-2017-16535)

Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16643).

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.

ID	Name	Product	Family	Severity
124970	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1517)	Nessus	Huawei Local Security Checks	high
108942	RHEL 7 : kernel-alt (RHSA-2018:0654)	Nessus	Red Hat Local Security Checks	high
105101	Ubuntu 16.04 LTS : Linux kernel (GCP) vulnerabilities (USN-3507-2)	Nessus	Ubuntu Local Security Checks	high
105100	Ubuntu 17.10 : linux, linux-raspi2 vulnerabilities (USN-3507-1) (Dirty COW)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2017-15306

medium

Tenable Plugins

high

high

high

high