A flaw was found in the hugetlb_mcopy_atomic_pte function in mm/hugetlb.c in the Linux kernel before 4.13.12. A lack of size check could cause a denial of service (BUG).

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4850 advisory.

    - vhost: make sure log_num < in_num (yongduan)  [Orabug: 30312787]  {CVE-2019-14835}
    - vhost: block speculation of translated descriptors (Michael S. Tsirkin)  [Orabug: 30312787]     {CVE-2019-14835}
    - net: hsr: fix memory leak in hsr_dev_finalize() (Mao Wenan)  [Orabug: 30444853]  {CVE-2019-16995}
    - ieee802154: enforce CAP_NET_RAW for raw sockets (Ori Nimron)  [Orabug: 30444946]  {CVE-2019-17053}
    - mISDN: enforce CAP_NET_RAW for raw sockets (Ori Nimron)  [Orabug: 30445158]  {CVE-2019-17055}
    - net: sit: fix memory leak in sit_init_net() (Mao Wenan)  [Orabug: 30445305]  {CVE-2019-16994}
    - media: dvb: usb: fix use after free in dvb_usb_device_exit (Oliver Neukum)  [Orabug: 30490491]     {CVE-2019-15213}
    - media: cpia2_usb: first wake up, then free in disconnect (Oliver Neukum)  [Orabug: 30511741]     {CVE-2019-15215}
    - media: usb:zr364xx:Fix KASAN:null-ptr-deref Read in zr364xx_vidioc_querycap (Vandana BN)  [Orabug:
    30532774]  {CVE-2019-15217}
    - x86/tsx: Add config options to set tsx=on|off|auto (Michal Hocko)  [Orabug: 30517133]  {CVE-2019-11135}
    - x86/speculation/taa: Add documentation for TSX Async Abort (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/tsx: Add 'auto' option to the tsx= cmdline parameter (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - kvm/x86: Export MDS_NO=0 to guests when TSX is enabled (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/speculation/taa: Add sysfs reporting for TSX Async Abort (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/speculation/taa: Add mitigation for TSX Async Abort (Kanth Ghatraju)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/cpu: Add a 'tsx=' cmdline option with TSX disabled by default (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/cpu: Add a helper function x86_read_arch_cap_msr() (Pawan Gupta)  [Orabug: 30517133]     {CVE-2019-11135}
    - x86/msr: Add the IA32_TSX_CTRL MSR (Pawan Gupta)  [Orabug: 30517133]  {CVE-2019-11135}
    - kvm: x86: mmu: Recovery of shattered NX large pages (Junaid Shahid)  [Orabug: 30517059]     {CVE-2018-12207}
    - kvm: Add helper function for creating VM worker threads (Junaid Shahid)  [Orabug: 30517059]     {CVE-2018-12207}
    - kvm: mmu: ITLB_MULTIHIT mitigation (Paolo Bonzini)  [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: remove now unneeded hugepage gfn adjustment (Paolo Bonzini)  [Orabug: 30517059]     {CVE-2018-12207}
    - KVM: x86: make FNAME(fetch) and __direct_map more similar (Paolo Bonzini)  [Orabug: 30517059]     {CVE-2018-12207}
    - kvm: x86: Do not release the page inside mmu_set_spte() (Junaid Shahid)  [Orabug: 30517059]     {CVE-2018-12207}
    - x86/cpu: Add Tremont to the cpu vulnerability whitelist (Pawan Gupta)  [Orabug: 30517059]     {CVE-2018-12207}
    - x86: Add ITLB_MULTIHIT bug infrastructure (Pawan Gupta)  [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Move mapping_level_dirty_bitmap() call in mapping_level() (Takuya Yoshikawa)  [Orabug:
    30517059]  {CVE-2018-12207}
    - Revert 'KVM: x86: use the fast way to invalidate all pages' (Sean Christopherson)  [Orabug: 30517059]     {CVE-2018-12207}
    - kvm: Convert kvm_lock to a mutex (Junaid Shahid)  [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Simplify force_pt_level calculation code in FNAME(page_fault)() (Takuya Yoshikawa)     [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Make force_pt_level bool (Takuya Yoshikawa)  [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Remove unused parameter parent_pte from kvm_mmu_get_page() (Takuya Yoshikawa)  [Orabug:
    30517059]  {CVE-2018-12207}
    - KVM: x86: extend usage of RET_MMIO_PF_* constants (Paolo Bonzini)  [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Make mmu_set_spte() return emulate value (Takuya Yoshikawa)  [Orabug: 30517059]     {CVE-2018-12207}
    - KVM: x86: MMU: Move parent_pte handling from kvm_mmu_get_page() to link_shadow_page() (Takuya Yoshikawa)     [Orabug: 30517059]  {CVE-2018-12207}
    - KVM: x86: MMU: Move initialization of parent_ptes out from kvm_mmu_alloc_page() (Takuya Yoshikawa)     [Orabug: 30517059]  {CVE-2018-12207}
    - i2c: core-smbus: prevent stack corruption on read I2C_BLOCK_DATA (Jeremy Compostella)  [Orabug:
    30210503]  {CVE-2017-18551}
    - net-sysfs: Fix mem leak in netdev_register_kobject (YueHaibing)  [Orabug: 30350263]  {CVE-2019-15916}

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.

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 :

  - The kernel package contains the Linux kernel (vmlinuz),     the core of any Linux operating system. The kernel     handles the basic functions of the operating system:
    memory allocation, process allocation, device input and     output, etc.Security Fix(es):A flaw named FragmentSmack     was found in the way the Linux kernel handled     reassembly of fragmented IPv4 and IPv6 packets. A     remote attacker could use this flaw to trigger time and     calculation expensive fragment reassembly algorithm by     sending specially crafted packets which could lead to a     CPU saturation and hence a denial of service on the     system.(CVE-2018-5391)Multiple out-of-bounds write     flaws were found in the way the Cherry Cymotion     keyboard driver, KYE/Genius device drivers, Logitech     device drivers, Monterey Genius KB29E keyboard driver,     Petalynx Maxter remote control driver, and Sunplus     wireless desktop driver handled HID reports with an     invalid report descriptor size. An attacker with     physical access to the system could use either of these     flaws to write data past an allocated memory     buffer.(CVE-2014-3184)The __get_data_block function in     fs/f2fs/data.c in the Linux kernel before 4.11 allows     local users to cause a denial of service (integer     overflow and loop) via crafted use of the open and     fallocate system calls with an FS_IOC_FIEMAP     ioctl.(CVE-2017-18257)netetfilter/xt_osf.c in the Linux     kernel through 4.14.4 does not require the     CAP_NET_ADMIN capability for add_callback and     remove_callback operations. This allows local users to     bypass intended access restrictions because the     xt_osf_fingers data structure is shared across all     network namespaces.(CVE-2017-17450)A denial of service     flaw was discovered in the Linux kernel, where a race     condition caused a NULL pointer dereference in the RDS     socket-creation code. A local attacker could use this     flaw to create a situation in which a NULL pointer     crashed the kernel.(CVE-2015-7990)An issue was     discovered in the Linux kernel before 4.19.9. The USB     subsystem mishandles size checks during the reading of     an extra descriptor, related to
    __usb_get_extra_descriptor in     drivers/usb/core/usb.c.(CVE-2018-20169)mm/memory.c in     the Linux kernel before 4.1.4 mishandles anonymous     pages, which allows local users to gain privileges or     cause a denial of service (page tainting) via a crafted     application that triggers writing to page     zero.(CVE-2015-3288)The ovl_setattr function in     fs/overlayfs/inode.c in the Linux kernel through 4.3.3     attempts to merge distinct setattr operations, which     allows local users to bypass intended access     restrictions and modify the attributes of arbitrary     overlay files via a crafted     application.(CVE-2015-8660)A flaw was found in the     Linux kernel where a local user with a shell account     can abuse the userfaultfd syscall when using hugetlbfs.
    A missing size check in hugetlb_mcopy_atomic_pte could     create an invalid inode variable, leading to a kernel     panic.(CVE-2017-15128)An integer overflow flaw was     found in the way the lzo1x_decompress_safe() function     of the Linux kernel's LZO implementation processed     Literal Runs. A local attacker could, in extremely rare     cases, use this flaw to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2014-4608)It was found that Linux kernel's     ptrace subsystem did not properly sanitize the     address-space-control bits when the program-status word     (PSW) was being set. On IBM S/390 systems, a local,     unprivileged user could use this flaw to set     address-space-control bits to the kernel space, and     thus gain read and write access to kernel     memory.(CVE-2014-3534)A use-after-free flaw was found     in the Linux kernel's file system encryption     implementation. A local user could revoke keyring keys     being used for ext4, f2fs, or ubifs encryption, causing     a denial of service on the system.(CVE-2017-7374)The     usbip_recv_xbuff function in     drivers/usb/usbip/usbip_common.c in the Linux kernel     before 4.5.3 allows remote attackers to cause a denial     of service (out-of-bounds write) or possibly have     unspecified other impact via a crafted length value in     a USB/IP packet.(CVE-2016-3955)A flaw was found in the     patches used to fix the 'dirtycow' vulnerability     (CVE-2016-5195). An attacker, able to run local code,     can exploit a race condition in transparent huge pages     to modify usually read-only huge     pages.(CVE-2017-1000405)The aio_mount function in     fs/aio.c in the Linux kernel does not properly restrict     execute access, which makes it easier for local users     to bypass intended SELinux W^X policy     restrictions.(CVE-2016-10044)The Serial Attached SCSI     (SAS) implementation in the Linux kernel mishandles a     mutex within libsas. This allows local users to cause a     denial of service (deadlock) by triggering certain     error-handling code.(CVE-2017-18232)A use-after-free     vulnerability was found in tcp_xmit_retransmit_queue     and other tcp_* functions. This condition could allow     an attacker to send an incorrect selective     acknowledgment to existing connections, possibly     resetting a connection.(CVE-2016-6828)The instruction     decoder in arch/x86/kvm/emulate.c in the KVM subsystem     in the Linux kernel before 3.18-rc2 does not properly     handle invalid instructions, which allows guest OS     users to cause a denial of service (NULL pointer     dereference and host OS crash) via a crafted     application that triggers (1) an improperly fetched     instruction or (2) an instruction that occupies too     many bytes. NOTE: this vulnerability exists because of     an incomplete fix for CVE-2014-8480.(CVE-2014-8481)The     snd_compress_check_input function in     sound/core/compress_offload.c in the ALSA subsystem in     the Linux kernel before 3.17 does not properly check     for an integer overflow, which allows local users to     cause a denial of service (insufficient memory     allocation) or possibly have unspecified other impact     via a crafted SNDRV_COMPRESS_SET_PARAMS ioctl     call.(CVE-2014-9904)The resv_map_release function in     mm/hugetlb.c in the Linux kernel, through 4.15.7,     allows local users to cause a denial of service (BUG)     via a crafted application that makes mmap system calls     and has a large pgoff argument to the remap_file_pages     system call.(CVE-2018-7740)

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.

ID	Name	Product	Family	Severity
131174	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2019-4850)	Nessus	Oracle Linux Local Security Checks	high
124828	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1505)	Nessus	Huawei Local Security Checks	critical

Detections

Analytics

CVE-2017-15128

medium

Tenable Plugins

high

critical