Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2017-5715     Multiple researchers have discovered a vulnerability in     various processors supporting speculative execution,     enabling an attacker controlling an unprivileged process     to read memory from arbitrary addresses, including from     the kernel and all other processes running on the     system.

  This specific attack has been named Spectre variant 2 (branch target   injection) and is mitigated for the x86 architecture (amd64 and   i386) by using the 'retpoline' compiler feature which allows   indirect branches to be isolated from speculative execution.

  - CVE-2017-5753     Multiple researchers have discovered a vulnerability in     various processors supporting speculative execution,     enabling an attacker controlling an unprivileged process     to read memory from arbitrary addresses, including from     the kernel and all other processes running on the     system.

  This specific attack has been named Spectre variant 1 (bounds-check   bypass) and is mitigated by identifying vulnerable code sections   (array bounds checking followed by array access) and replacing the   array access with the speculation-safe array_index_nospec()   function.

  More use sites will be added over time.

  - CVE-2017-17975     Tuba Yavuz reported a use-after-free flaw in the     USBTV007 audio-video grabber driver. A local user could     use this for denial of service by triggering failure of     audio registration.

  - CVE-2017-18193     Yunlei He reported that the f2fs implementation does not     properly handle extent trees, allowing a local user to     cause a denial of service via an application with     multiple threads.

  - CVE-2017-18216     Alex Chen reported that the OCFS2 filesystem failed to     hold a necessary lock during nodemanager sysfs file     operations, potentially leading to a NULL pointer     dereference. A local user could use this for denial of     service.

  - CVE-2017-18218     Jun He reported a use-after-free flaw in the Hisilicon     HNS ethernet driver. A local user could use this for     denial of service.

  - CVE-2017-18222     It was reported that the Hisilicon Network Subsystem     (HNS) driver implementation does not properly handle     ethtool private flags. A local user could use this for     denial of service or possibly have other impact.

  - CVE-2017-18224     Alex Chen reported that the OCFS2 filesystem omits the     use of a semaphore and consequently has a race condition     for access to the extent tree during read operations in     DIRECT mode. A local user could use this for denial of     service.

  - CVE-2017-18241     Yunlei He reported that the f2fs implementation does not     properly initialise its state if the 'noflush_merge'     mount option is used. A local user with access to a     filesystem mounted with this option could use this to     cause a denial of service.

  - CVE-2017-18257     It was reported that the f2fs implementation is prone to     an infinite loop caused by an integer overflow in the
    __get_data_block() function. A local user can use this     for denial of service via crafted use of the open and     fallocate system calls with an FS_IOC_FIEMAP ioctl.

  - CVE-2018-1065     The syzkaller tool found a NULL pointer dereference flaw     in the netfilter subsystem when handling certain     malformed iptables rulesets. A local user with the     CAP_NET_RAW or CAP_NET_ADMIN capability (in any user     namespace) could use this to cause a denial of service.
    Debian disables unprivileged user namespaces by default.

  - CVE-2018-1066     Dan Aloni reported to Red Hat that the CIFS client     implementation would dereference a NULL pointer if the     server sent an invalid response during NTLMSSP setup     negotiation. This could be used by a malicious server     for denial of service.

  - CVE-2018-1068     The syzkaller tool found that the 32-bit compatibility     layer of ebtables did not sufficiently validate offset     values. On a 64-bit kernel, a local user with the     CAP_NET_ADMIN capability (in any user namespace) could     use this to overwrite kernel memory, possibly leading to     privilege escalation. Debian disables unprivileged user     namespaces by default.

  - CVE-2018-1092     Wen Xu reported that a crafted ext4 filesystem image     would trigger a null dereference when mounted. A local     user able to mount arbitrary filesystems could use this     for denial of service.

  - CVE-2018-1093     Wen Xu reported that a crafted ext4 filesystem image     could trigger an out-of-bounds read in the     ext4_valid_block_bitmap() function. A local user able to     mount arbitrary filesystems could use this for denial of     service.

  - CVE-2018-1108     Jann Horn reported that crng_ready() does not properly     handle the crng_init variable states and the RNG could     be treated as cryptographically safe too early after     system boot.

  - CVE-2018-5803     Alexey Kodanev reported that the SCTP protocol did not     range-check the length of chunks to be created. A local     or remote user could use this to cause a denial of     service.

  - CVE-2018-7480     Hou Tao discovered a double-free flaw in the     blkcg_init_queue() function in block/blk-cgroup.c. A     local user could use this to cause a denial of service     or have other impact.

  - CVE-2018-7566     Fan LongFei reported a race condition in the ALSA     (sound) sequencer core, between write and ioctl     operations. This could lead to an out-of-bounds access     or use-after-free. A local user with access to a     sequencer device could use this for denial of service or     possibly for privilege escalation.

  - CVE-2018-7740     Nic Losby reported that the hugetlbfs filesystem's mmap     operation did not properly range-check the file offset.
    A local user with access to files on a hugetlbfs     filesystem could use this to cause a denial of service.

  - CVE-2018-7757     Jason Yan reported a memory leak in the SAS     (Serial-Attached SCSI) subsystem. A local user on a     system with SAS devices could use this to cause a denial     of service.

  - CVE-2018-7995     Seunghun Han reported a race condition in the x86 MCE     (Machine Check Exception) driver. This is unlikely to     have any security impact.

  - CVE-2018-8087     A memory leak flaw was found in the hwsim_new_radio_nl()     function in the simulated radio testing tool driver for     mac80211, allowing a local user to cause a denial of     service.

  - CVE-2018-8781     Eyal Itkin reported that the udl (DisplayLink) driver's     mmap operation did not properly range-check the file     offset. A local user with access to a udl framebuffer     device could exploit this to overwrite kernel memory,     leading to privilege escalation.

  - CVE-2018-8822     Dr Silvio Cesare of InfoSect reported that the ncpfs     client implementation did not validate reply lengths     from the server. An ncpfs server could use this to cause     a denial of service or remote code execution in the     client.

  - CVE-2018-10323     Wen Xu reported a NULL pointer dereference flaw in the     xfs_bmapi_write() function triggered when mounting and     operating a crafted xfs filesystem image. A local user     able to mount arbitrary filesystems could use this for     denial of service.

  - CVE-2018-1000199     Andy Lutomirski discovered that the ptrace subsystem did     not sufficiently validate hardware breakpoint settings.
    Local users can use this to cause a denial of service,     or possibly for privilege escalation, on x86 (amd64 and     i386) and possibly other architectures.

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 :

  - drivers/hid/hid-zpff.c in the Human Interface Device     (HID) subsystem in the Linux kernel through 3.11, when     CONFIG_HID_ZEROPLUS is enabled, allows physically     proximate attackers to cause a denial of service     (heap-based out-of-bounds write) via a crafted     device.(CVE-2013-2889i1/4%0

  - The capabilities implementation in the Linux kernel     before 3.14.8 does not properly consider that     namespaces are inapplicable to inodes, which allows     local users to bypass intended chmod restrictions by     first creating a user namespace, as demonstrated by     setting the setgid bit on a file with group ownership     of root.(CVE-2014-4014i1/4%0

  - The function drivers/usb/core/config.c in the Linux     kernel, allows 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,     related to the USB_DT_INTERFACE_ASSOCIATION     descriptor.(CVE-2017-16531i1/4%0

  - The snd_timer_interrupt function in sound/core/timer.c     in the Linux kernel before 4.4.1 does not properly     maintain a certain linked list, which allows local     users to cause a denial of service (race condition and     system crash) via a crafted ioctl     call.(CVE-2016-2545i1/4%0

  - A flaw was found in the Linux kernel where the deletion     of a file or directory could trigger an unmount and     reveal data under a mount point. This flaw was     inadvertently introduced with the new feature of being     able to lazily unmount a mount tree when using file     system user namespaces.(CVE-2015-4176i1/4%0

  - The do_shmat function in ipc/shm.c in the Linux kernel,     through 4.9.12, does not restrict the address     calculated by a certain rounding operation. This allows     privileged local users to map page zero and,     consequently, bypass a protection mechanism that exists     for the mmap system call. This is possible by making     crafted shmget and shmat system calls in a privileged     context.(CVE-2017-5669i1/4%0

  - In drivers/net/ethernet/hisilicon/hns/hns_enet.c in the     Linux kernel, before 4.13, local users can cause a     denial of service (use-after-free and BUG) or possibly     have unspecified other impact by leveraging differences     in skb handling between hns_nic_net_xmit_hw and     hns_nic_net_xmit.(CVE-2017-18218i1/4%0

  - The ioapic_deliver function in virt/kvm/ioapic.c in the     Linux kernel through 3.14.1 does not properly validate     the kvm_irq_delivery_to_apic return value, which allows     guest OS users to cause a denial of service (host OS     crash) via a crafted entry in the redirection table of     an I/O APIC. NOTE: the affected code was moved to the     ioapic_service function before the vulnerability was     announced.(CVE-2014-0155i1/4%0

  - 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-2013-7421i1/4%0

  - Off-by-one error in the get_prng_bytes function in     crypto/ansi_cprng.c in the Linux kernel through 3.11.4     makes it easier for context-dependent attackers to     defeat cryptographic protection mechanisms via multiple     requests for small amounts of data, leading to improper     management of the state of the consumed     data.(CVE-2013-4345i1/4%0

  - sound/core/timer.c in the Linux kernel before 4.4.1     uses an incorrect type of mutex, which allows local     users to cause a denial of service (race condition,     use-after-free, and system crash) via a crafted ioctl     call.(CVE-2016-2546i1/4%0

  - The do_get_mempolicy function in mm/mempolicy.c in the     Linux kernel before 4.12.9 allows local users to cause     a denial of service (use-after-free) or possibly have     unspecified other impact via crafted system     calls.(CVE-2018-10675i1/4%0

  - A certain backport in the TCP Fast Open implementation     for the Linux kernel before 3.18 does not properly     maintain a count value, which allow local users to     cause a denial of service (system crash) via the Fast     Open feature, as demonstrated by visiting the     chrome://flags/#enable-tcp-fast-open URL when using     certain 3.10.x through 3.16.x kernel builds, including     longterm-maintenance releases and ckt (aka Canonical     Kernel Team) builds.(CVE-2015-3332i1/4%0

  - It was found that the try_to_unmap_cluster() function     in the Linux kernel's Memory Managment subsystem did     not properly handle page locking in certain cases,     which could potentially trigger the BUG_ON() macro in     the mlock_vma_page() function. A local, unprivileged     user could use this flaw to crash the     system.(CVE-2014-3122i1/4%0

  - The blkcg_init_queue function in block/blk-cgroup.c in     the Linux kernel, before 4.11, allows local users to     cause a denial of service (double free) or possibly     have unspecified other impact by triggering a creation     failure.(CVE-2018-7480i1/4%0

  - The create_fixed_stream_quirk function in     sound/usb/quirks.c in the snd-usb-audio driver in the     Linux kernel before 4.5.1 allows physically proximate     attackers to cause a denial of service (NULL pointer     dereference or double free, and system crash) via a     crafted endpoints value in a USB device     descriptor.(CVE-2016-2184i1/4%0

  - The etm_setup_aux function in     drivers/hwtracing/coresight/coresight-etm-perf.c in the     Linux kernel before 4.10.2 allows attackers to cause a     denial of service (panic) because a parameter is     incorrectly used as a local variable.(CVE-2018-11232i1/4%0

  - A division-by-zero in set_termios(), when debugging is     enabled, was found in the Linux kernel. When the     [io_ti] driver is loaded, a local unprivileged attacker     can request incorrect high transfer speed in the     change_port_settings() in the     drivers/usb/serial/io_ti.c so that the divisor value     becomes zero and causes a system crash resulting in a     denial of service.(CVE-2017-18360i1/4%0

  - A flaw was found where the XFS filesystem code     mishandles a user-settable inode flag in the Linux     kernel prior to 4.14-rc1. This can cause a local denial     of service via a kernel panic.(CVE-2017-14340i1/4%0

  - An issue was discovered in the Linux kernel through     4.19. An information leak in cdrom_ioctl_select_disc in     drivers/cdrom/cdrom.c could be used by local attackers     to read kernel memory because a cast from unsigned long     to int interferes with bounds     checking.(CVE-2018-18710i1/4%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.

An update of the linux package has been released.

ID	Name	Product	Family	Published	Updated	Severity
109518	Debian DSA-4188-1 : linux - security update (Spectre)	Nessus	Debian Local Security Checks	5/2/2018	10/15/2024	high
124795	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1471)	Nessus	Huawei Local Security Checks	5/13/2019	5/23/2024	high
121933	Photon OS 2.0: Linux PHSA-2018-2.0-0037-(a)	Nessus	PhotonOS Local Security Checks	2/7/2019	6/21/2024	high

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