An issue was discovered in the Linux kernel before 4.18.11. The ipddp_ioctl function in drivers/net/appletalk/ipddp.c allows local users to obtain sensitive kernel address information by leveraging CAP_NET_ADMIN to read the ipddp_route dev and next fields via an SIOCFINDIPDDPRT ioctl call.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4118-1 advisory.

    It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow     vulnerability. A local attacker could use this to cause a denial of service. (CVE-2018-13053)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode     validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause     a denial of service (system crash). (CVE-2018-13093)

    Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate     metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a     denial of service (system crash). (CVE-2018-13096, CVE-2018-13097, CVE-2018-13098, CVE-2018-13099,     CVE-2018-13100, CVE-2018-14614, CVE-2018-14615, CVE-2018-14616)

    Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation in the Linux kernel did not     properly validate metadata. An attacker could use this to construct a malicious btrfs image that, when     mounted, could cause a denial of service (system crash). (CVE-2018-14609, CVE-2018-14610, CVE-2018-14611,     CVE-2018-14612, CVE-2018-14613)

    Wen Xu discovered that the HFS+ filesystem implementation in the Linux kernel did not properly handle     malformed catalog data in some situations. An attacker could use this to construct a malicious HFS+ image     that, when mounted, could cause a denial of service (system crash). (CVE-2018-14617)

    Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of the Linux kernel did not     properly initialize new files in some situations. A local attacker could use this to expose sensitive     information. (CVE-2018-16862)

    Hui Peng and Mathias Payer discovered that the Option USB High Speed driver in the Linux kernel did not     properly validate metadata received from the device. A physically proximate attacker could use this to     cause a denial of service (system crash). (CVE-2018-19985)

    Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux kernel did not properly handle     size checks when handling an extra USB descriptor. A physically proximate attacker could use this to cause     a denial of service (system crash). (CVE-2018-20169)

    Zhipeng Xie discovered that an infinite loop could be triggered in the CFS Linux kernel process scheduler.
    A local attacker could possibly use this to cause a denial of service. (CVE-2018-20784)

    It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel     when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2018-20856)

    Eli Biham and Lior Neumann discovered that the Bluetooth implementation in the Linux kernel did not     properly validate elliptic curve parameters during Diffie-Hellman key exchange in some situations. An     attacker could use this to expose sensitive information. (CVE-2018-5383)

    It was discovered that the Intel Wi-Fi device driver in the Linux kernel did not properly validate certain     Tunneled Direct Link Setup (TDLS). A physically proximate attacker could use this to cause a denial of     service (Wi-Fi disconnect). (CVE-2019-0136)

    It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the     Linux kernel. An attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2019-10126)

    It was discovered that the Bluetooth UART implementation in the Linux kernel did not properly check for     missing tty operations. A local attacker could use this to cause a denial of service. (CVE-2019-10207)

    Amit Klein and Benny Pinkas discovered that the Linux kernel did not sufficiently randomize IP ID values     generated for connectionless networking protocols. A remote attacker could use this to track particular     Linux devices. (CVE-2019-10638)

    Amit Klein and Benny Pinkas discovered that the location of kernel addresses could be exposed by the     implementation of connection-less network protocols in the Linux kernel. A remote attacker could possibly     use this to assist in the exploitation of another vulnerability in the Linux kernel. (CVE-2019-10639)

    Adam Zabrocki discovered that the Intel i915 kernel mode graphics driver in the Linux kernel did not     properly restrict mmap() ranges in some situations. A local attacker could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2019-11085)

    It was discovered that an integer overflow existed in the Linux kernel when reference counting pages,     leading to potential use-after-free issues. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2019-11487)

    Jann Horn discovered that a race condition existed in the Linux kernel when performing core dumps. A local     attacker could use this to cause a denial of service (system crash) or expose sensitive information.
    (CVE-2019-11599)

    It was discovered that a null pointer dereference vulnerability existed in the LSI Logic MegaRAID driver     in the Linux kernel. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2019-11810)

    It was discovered that a race condition leading to a use-after-free existed in the Reliable Datagram     Sockets (RDS) protocol implementation in the Linux kernel. The RDS protocol is disabled via blocklist by     default in Ubuntu.

    If enabled, a local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2019-11815)

    It was discovered that the ext4 file system implementation in the Linux kernel did not properly zero out     memory in some situations. A local attacker could use this to expose sensitive information (kernel     memory). (CVE-2019-11833)

    It was discovered that the Bluetooth Human Interface Device Protocol (HIDP) implementation in the Linux     kernel did not properly verify strings were NULL terminated in certain situations. A local attacker could     use this to expose sensitive information (kernel memory). (CVE-2019-11884)

    It was discovered that a NULL pointer dereference vulnerabilty existed in the Near-field communication     (NFC) implementation in the Linux kernel. An attacker could use this to cause a denial of service (system     crash). (CVE-2019-12818)

    It was discovered that the MDIO bus devices subsystem in the Linux kernel improperly dropped a device     reference in an error condition, leading to a use-after-free. An attacker could use this to cause a denial     of service (system crash). (CVE-2019-12819)

    It was discovered that a NULL pointer dereference vulnerability existed in the Near-field communication     (NFC) implementation in the Linux kernel. A local attacker could use this to cause a denial of service     (system crash). (CVE-2019-12984)

    Jann Horn discovered a use-after-free vulnerability in the Linux kernel when accessing LDT entries in some     situations. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2019-13233)

    Jann Horn discovered that the ptrace implementation in the Linux kernel did not properly record     credentials in some situations. A local attacker could use this to cause a denial of service (system     crash) or possibly gain administrative privileges. (CVE-2019-13272)

    It was discovered that the GTCO tablet input driver in the Linux kernel did not properly bounds check the     initial HID report sent by the device. A physically proximate attacker could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2019-13631)

    It was discovered that the floppy driver in the Linux kernel did not properly validate meta data, leading     to a buffer overread. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2019-14283)

    It was discovered that the floppy driver in the Linux kernel did not properly validate ioctl() calls,     leading to a division-by-zero. A local attacker could use this to cause a denial of service (system     crash). (CVE-2019-14284)

    Tuba Yavuz discovered that a race condition existed in the DesignWare USB3 DRD Controller device driver in     the Linux kernel. A physically proximate attacker could use this to cause a denial of service.
    (CVE-2019-14763)

    It was discovered that an out-of-bounds read existed in the QLogic QEDI iSCSI Initiator Driver in the     Linux kernel. A local attacker could possibly use this to expose sensitive information (kernel memory).
    (CVE-2019-15090)

    It was discovered that the Raremono AM/FM/SW radio device driver in the Linux kernel did not properly     allocate memory, leading to a use-after-free. A physically proximate attacker could use this to cause a     denial of service or possibly execute arbitrary code. (CVE-2019-15211)

    It was discovered at a double-free error existed in the USB Rio 500 device driver for the Linux kernel. A     physically proximate attacker could use this to cause a denial of service. (CVE-2019-15212)

    It was discovered that a race condition existed in the Advanced Linux Sound Architecture (ALSA) subsystem     of the Linux kernel, leading to a potential use-after-free. A physically proximate attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-15214)

    It was discovered that a race condition existed in the CPiA2 video4linux device driver for the Linux     kernel, leading to a use-after-free. A physically proximate attacker could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2019-15215)

    It was discovered that a race condition existed in the Softmac USB Prism54 device driver in the Linux     kernel. A physically proximate attacker could use this to cause a denial of service (system crash).
    (CVE-2019-15220)

    It was discovered that a use-after-free vulnerability existed in the AppleTalk implementation in the Linux     kernel if an error occurs during initialization. A local attacker could use this to cause a denial of     service (system crash). (CVE-2019-15292)

    It was discovered that the Empia EM28xx DVB USB device driver implementation in the Linux kernel contained     a use-after-free vulnerability when disconnecting the device. An attacker could use this to cause a denial     of service (system crash). (CVE-2019-2024)

    It was discovered that the USB video device class implementation in the Linux kernel did not properly     validate control bits, resulting in an out of bounds buffer read. A local attacker could use this to     possibly expose sensitive information (kernel memory). (CVE-2019-2101)

    It was discovered that the Marvell Wireless LAN device driver in the Linux kernel did not properly     validate the BSS descriptor. A local attacker could possibly use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2019-3846)

    Jason Wang discovered that an infinite loop vulnerability existed in the virtio net driver in the Linux     kernel. A local attacker in a guest VM could possibly use this to cause a denial of service in the host     system. (CVE-2019-3900)

    Daniele Antonioli, Nils Ole Tippenhauer, and Kasper B. Rasmussen discovered that the Bluetooth protocol     BR/EDR specification did not properly require sufficiently strong encryption key lengths. A physically     proximate attacker could use this to expose sensitive information. (CVE-2019-9506)

    It was discovered that the Appletalk IP encapsulation driver in the Linux kernel did not properly prevent     kernel addresses from being copied to user space. A local attacker with the CAP_NET_ADMIN capability could     use this to expose sensitive information. (CVE-2018-20511)

    It was discovered that a race condition existed in the USB YUREX device driver in the Linux kernel. A     physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15216)

    It was discovered that the Siano USB MDTV receiver device driver in the Linux kernel made improper     assumptions about the device characteristics. A physically proximate attacker could use this cause a     denial of service (system crash). (CVE-2019-15218)

    It was discovered that the Line 6 POD USB device driver in the Linux kernel did not properly validate data     size information from the device. A physically proximate attacker could use this to cause a denial of     service (system crash). (CVE-2019-15221)

    Muyu Yu discovered that the CAN implementation in the Linux kernel in some situations did not properly     restrict the field size when processing outgoing frames. A local attacker with CAP_NET_ADMIN privileges     could use this to execute arbitrary code. (CVE-2019-3701)

    Vladis Dronov discovered that the debug interface for the Linux kernel's HID subsystem did not properly     validate passed parameters in some situations. A local privileged attacker could use this to cause a     denial of service (infinite loop). (CVE-2019-3819)

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.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4094-1 advisory.

    It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow     vulnerability. A local attacker could use this to cause a denial of service. (CVE-2018-13053)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode     validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause     a denial of service (system crash). (CVE-2018-13093)

    Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate     metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a     denial of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100, CVE-2018-14614,     CVE-2018-14616, CVE-2018-13096, CVE-2018-13098, CVE-2018-14615)

    Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation in the Linux kernel did not     properly validate metadata. An attacker could use this to construct a malicious btrfs image that, when     mounted, could cause a denial of service (system crash). (CVE-2018-14610, CVE-2018-14611, CVE-2018-14612,     CVE-2018-14613, CVE-2018-14609)

    Wen Xu discovered that the HFS+ filesystem implementation in the Linux kernel did not properly handle     malformed catalog data in some situations. An attacker could use this to construct a malicious HFS+ image     that, when mounted, could cause a denial of service (system crash). (CVE-2018-14617)

    Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of the Linux kernel did not     properly initialize new files in some situations. A local attacker could use this to expose sensitive     information. (CVE-2018-16862)

    Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux kernel did not properly handle     size checks when handling an extra USB descriptor. A physically proximate attacker could use this to cause     a denial of service (system crash). (CVE-2018-20169)

    It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel     when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2018-20856)

    Eli Biham and Lior Neumann discovered that the Bluetooth implementation in the Linux kernel did not     properly validate elliptic curve parameters during Diffie-Hellman key exchange in some situations. An     attacker could use this to expose sensitive information. (CVE-2018-5383)

    It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the     Linux kernel. An attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2019-10126)

    Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors incorrectly handle SWAPGS instructions     during speculative execution. A local attacker could use this to expose sensitive information (kernel     memory). (CVE-2019-1125)

    It was discovered that the PowerPC dlpar implementation in the Linux kernel did not properly check for     allocation errors in some situations. A local attacker could possibly use this to cause a denial of     service (system crash). (CVE-2019-12614)

    It was discovered that a NULL pointer dereference vulnerabilty existed in the Near-field communication     (NFC) implementation in the Linux kernel. An attacker could use this to cause a denial of service (system     crash). (CVE-2019-12818)

    It was discovered that the MDIO bus devices subsystem in the Linux kernel improperly dropped a device     reference in an error condition, leading to a use-after-free. An attacker could use this to cause a denial     of service (system crash). (CVE-2019-12819)

    It was discovered that a NULL pointer dereference vulnerability existed in the Near-field communication     (NFC) implementation in the Linux kernel. A local attacker could use this to cause a denial of service     (system crash). (CVE-2019-12984)

    Jann Horn discovered a use-after-free vulnerability in the Linux kernel when accessing LDT entries in some     situations. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2019-13233)

    Jann Horn discovered that the ptrace implementation in the Linux kernel did not properly record     credentials in some situations. A local attacker could use this to cause a denial of service (system     crash) or possibly gain administrative privileges. (CVE-2019-13272)

    It was discovered that the Empia EM28xx DVB USB device driver implementation in the Linux kernel contained     a use-after-free vulnerability when disconnecting the device. An attacker could use this to cause a denial     of service (system crash). (CVE-2019-2024)

    It was discovered that the USB video device class implementation in the Linux kernel did not properly     validate control bits, resulting in an out of bounds buffer read. A local attacker could use this to     possibly expose sensitive information (kernel memory). (CVE-2019-2101)

    It was discovered that the Marvell Wireless LAN device driver in the Linux kernel did not properly     validate the BSS descriptor. A local attacker could possibly use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2019-3846)

    It was discovered that the Appletalk IP encapsulation driver in the Linux kernel did not properly prevent     kernel addresses from being copied to user space. A local attacker with the CAP_NET_ADMIN capability could     use this to expose sensitive information. (CVE-2018-20511)

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.

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

  - A malformed SG_IO ioctl issued for a SCSI device in the     Linux kernel leads to a local kernel data leak     manifesting in up to approximately 1000 memory pages     copied to the userspace. The problem has limited scope     as non-privileged users usually have no permissions to     access SCSI device files.(CVE-2018-1000204)

  - A flaw in the load_elf_binary() function in the Linux     kernel allows a local attacker to leak the base address     of .text and stack sections for setuid binaries and     bypass ASLR because install_exec_creds() is called too     late in this function.(CVE-2019-11190)

  - A flaw was found in the Linux kernel in the     hid_debug_events_read() function in the     drivers/hid/hid-debug.c file. A lack of the certain     checks may allow a privileged user ('root') to achieve     an out-of-bounds write and thus receiving user space     buffer corruption.(CVE-2018-9516)

  - A flaw was found in the Linux kernel's NFS41+     subsystem. NFS41+ shares mounted in different network     namespaces at the same time can make bc_svc_process()     use wrong back-channel IDs and cause a use-after-free     vulnerability. Thus a malicious container user can     cause a host kernel memory corruption and a system     panic. Due to the nature of the flaw, privilege     escalation cannot be fully ruled out.(CVE-2018-16884)

  - 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. This is similar     to CVE-2018-10940 and CVE-2018-16658.(CVE-2018-18710)

  - A flaw was found in the Linux kernel in the function     hso_probe() which reads if_num value from the USB     device (as an u8) and uses it without a length check to     index an array, resulting in an OOB memory read in     hso_probe() or hso_get_config_data(). An attacker with     a forged USB device and physical access to a system     (needed to connect such a device) can cause a system     crash and a denial of service.(CVE-2018-19985)

  - A possible memory corruption due to a type confusion     was found in the Linux kernel in the sk_clone_lock()     function in the net/core/sock.c. The possibility of     local escalation of privileges cannot be fully ruled     out for a local unprivileged attacker.(CVE-2018-9568)

  - A flaw was found in the Linux kernels implementation of     Logical link control and adaptation protocol (L2CAP),     part of the Bluetooth stack. An attacker with physical     access within the range of standard Bluetooth     transmission can create a specially crafted packet. The     response to this specially crafted packet can contain     part of the kernel stack which can be used in a further     attack.(CVE-2019-3459)

  - A flaw was found in the Linux kernel's implementation     of logical link control and adaptation protocol     (L2CAP), part of the Bluetooth stack in the     l2cap_parse_conf_rsp and l2cap_parse_conf_req     functions. An attacker with physical access within the     range of standard Bluetooth transmission can create a     specially crafted packet. The response to this     specially crafted packet can contain part of the kernel     stack which can be used in a further     attack.(CVE-2019-3460)

  - An information leakage issue was found in the way Linux     kernel's KVM hypervisor handled page fault exceptions     while emulating instructions like VMXON, VMCLEAR,     VMPTRLD, and VMWRITE with memory address as an operand.
    It occurs if the operand is a mmio address, as the     returned exception object holds uninitialized stack     memory contents. A guest user/process could use this     flaw to leak host's stack memory contents to a guest.
    (CVE-2019-7222)

  - A flaw was found in mmap in the Linux kernel allowing     the process to map a null page. This allows attackers     to abuse this mechanism to turn null pointer     dereferences into workable exploits(CVE-2019-9213)

  - A flaw was found in the Linux kernel's ext4 filesystem.
    A local user can cause an out-of-bound write in the     fs/jbd2/transaction.c code, a denial of service, and a     system crash by unmounting a crafted ext4 filesystem     image.(CVE-2018-10882)

  - An issue was discovered in the Linux kernel before     4.18.11. The ipddp_ioctl function in     drivers/net/appletalk/ipddp.c allows local users to     obtain sensitive kernel address information by     leveraging CAP_NET_ADMIN to read the ipddp_route dev     and next fields via an SIOCFINDIPDDPRT ioctl call.
    (CVE-2018-20511)

  - A flaw was found in the implementation of the 'fill     buffer', a mechanism used by modern CPUs when a     cache-miss is made on L1 CPU cache. If an attacker can     generate a load operation that would create a page     fault, the execution will continue speculatively with     incorrect data from the fill buffer while the data is     fetched from higher level caches. This response time     can be measured to infer data in the fill buffer.
    (CVE-2018-12130)

  - Modern Intel microprocessors implement hardware-level     micro-optimizations to improve the performance of     writing data back to CPU caches. The write operation is     split into STA (STore Address) and STD (STore Data)     sub-operations. These sub-operations allow the     processor to hand-off address generation logic into     these sub-operations for optimized writes. Both of     these sub-operations write to a shared distributed     processor structure called the 'processor store     buffer'. As a result, an unprivileged attacker could     use this flaw to read private data resident within the     CPU's processor store buffer. (CVE-2018-12126)

  - Microprocessors use a aEUR~load portaEURtm subcomponent to     perform load operations from memory or IO. During a     load operation, the load port receives data from the     memory or IO subsystem and then provides the data to     the CPU registers and operations in the CPUaEURtms     pipelines. Stale load operations results are stored in     the 'load port' table until overwritten by newer     operations. Certain load-port operations triggered by     an attacker can be used to reveal data about previous     stale requests leaking data back to the attacker via a     timing side-channel. (CVE-2018-12127)

  - Uncacheable memory on some microprocessors utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access. (CVE-2019-11091)

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.

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 :

  - An information-leak vulnerability was found in the     kernel when it truncated a file to a smaller size which     consisted of an inline extent that was compressed. The     data between the new file size and the old file size     was not discarded and the number of bytes used by the     inode were not correctly decremented, which gave the     wrong report for callers of the stat(2) syscall. This     wasted metadata space and allowed for the truncated     data to be leaked, and data corruption or loss to     occur. A caller of the clone ioctl could exploit this     flaw by using only standard file-system operations     without root access to read the truncated     data.(CVE-2015-8374i1/4%0

  - crypto/pcrypt.c in the Linux kernel, before 4.14.13,     mishandles freeing instances, allowing a local user     able to access the AF_ALG-based AEAD interface     (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt     (CONFIG_CRYPTO_PCRYPT) to cause a denial of service     (kfree of an incorrect pointer) or possibly have     unspecified other impact by executing a crafted     sequence of system calls. Due to the nature of the     flaw, privilege escalation cannot be fully ruled out,     although we believe it is unlikely.(CVE-2017-18075i1/4%0

  - An elevation of privilege vulnerability in the Qualcomm     Wi-Fi driver could enable a local malicious application     to execute arbitrary code within the context of the     kernel. This issue is rated as High because it first     requires compromising a privileged process. Product:
    Android. Versions: N/A. Android ID: A-32835279.
    References: QC-CR#1096945.(CVE-2017-0523i1/4%0

  - The saa7164_bus_get function in     drivers/media/pci/saa7164/saa7164-bus.c in the Linux     kernel through 4.10.14 allows local users to cause a     denial of service (out-of-bounds array access) or     possibly have unspecified other impact by changing a     certain sequence-number value, aka a 'double fetch'     vulnerability.(CVE-2017-8831i1/4%0

  - A flaw was found in the way the Linux kernel's splice()     system call validated its parameters. On certain file     systems, a local, unprivileged user could use this flaw     to write past the maximum file size, and thus crash the     system.(CVE-2014-7822i1/4%0

  - The vc4_get_bcl function in     drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM     driver in the Linux kernel before 4.9.7 does not set an     errno value upon certain overflow detections allowing     local users to cause a denial of service (incorrect     pointer dereference and OOPS) via inconsistent size     values in a VC4_SUBMIT_CL ioctl call.(CVE-2017-5577i1/4%0

  - In fs/ocfs2/cluster/nodemanager.c in the Linux kernel     before 4.15, local users can cause a denial of service     (NULL pointer dereference and BUG) because a required     mutex is not used.(CVE-2017-18216i1/4%0

  - A race condition issue leading to a use-after-free flaw     was found in the way the raw packet sockets     implementation in the Linux kernel networking subsystem     handled synchronization while creating the TPACKET_V3     ring buffer. A local user able to open a raw packet     socket (requires the CAP_NET_RAW capability) could use     this flaw to elevate their privileges on the     system.(CVE-2016-8655i1/4%0

  - An exploitable memory corruption flaw was found in the     Linux kernel. The append path can be erroneously     switched from UFO to non-UFO in ip_ufo_append_data()     when building an UFO packet with MSG_MORE option. If     unprivileged user namespaces are available, this flaw     can be exploited to gain root     privileges.(CVE-2017-1000112i1/4%0

  - A security flaw was found in the Linux kernel in a way     that the cleancache subsystem clears an inode after the     final file truncation (removal). The new file created     with the same inode may contain leftover pages from     cleancache and the old file data instead of the new     one.(CVE-2018-16862i1/4%0

  - arch/arm64/ include /asm/pgtable.h in the Linux kernel     before 3.15-rc5-next-20140519, as used in Android     before 2016-07-05 on Nexus 5X and 6P devices,     mishandles execute-only pages, which allows attackers     to gain privileges via a crafted application, aka     Android internal bug 28557020.(CVE-2014-9803i1/4%0

  - A heap-buffer overflow vulnerability was found in the     arcmsr_iop_message_xfer() function in     'drivers/scsi/arcmsr/arcmsr_hba.c' file in the Linux     kernel through 4.8.2. The function does not restrict a     certain length field, which allows local users to gain     privileges or cause a denial of service via an     ARCMSR_MESSAGE_WRITE_WQBUFFER control code. This can     potentially cause kernel heap corruption and arbitrary     kernel code execution.(CVE-2016-7425i1/4%0

  - An issue was discovered in the Linux kernel before     4.18.11. The ipddp_ioctl function in     drivers/net/appletalk/ipddp.c allows local users to     obtain sensitive kernel address information by     leveraging CAP_NET_ADMIN to read the ipddp_route dev     and next fields via an SIOCFINDIPDDPRT ioctl     call.(CVE-2018-20511i1/4%0

  - A memory leak in the irda_bind function in     net/irda/af_irda.c in the Linux kernel, through 4.16,     allows local users to cause a denial of service due to     a memory consumption by repeatedly binding an AF_IRDA     socket.(CVE-2018-6554i1/4%0

  - sound/core/timer.c in the Linux kernel before 4.4.1     employs a locking approach that does not consider slave     timer instances, which allows local users to cause a     denial of service (race condition, use-after-free, and     system crash) via a crafted ioctl     call.(CVE-2016-2547i1/4%0

  - Buffer overflow in the complete_emulated_mmio function     in arch/x86/kvm/x86.c in the Linux kernel before 3.13.6     allows guest OS users to execute arbitrary code on the     host OS by leveraging a loop that triggers an invalid     memory copy affecting certain cancel_work_item     data.(CVE-2014-0049i1/4%0

  - An issue was discovered in the F2FS filesystem code in     the Linux kernel in fs/f2fs/inode.c. A denial of     service due to a slab out-of-bounds read can occur for     a crafted f2fs filesystem image in which FI_EXTRA_ATTR     is set in an inode.(CVE-2018-13098i1/4%0

  - A vulnerability was found in the Linux kernel where     having malicious IP options present would cause the     ipv4_pktinfo_prepare() function to drop/free the dst.
    This could result in a system crash or possible     privilege escalation.(CVE-2017-5970i1/4%0

  - In the Linux kernel's vmw_gb_surface_define_ioctl()     function, in 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c'     file, a 'req-i1/4zmip_levels' is a user-controlled value     which is later used as a loop count limit. This allows     local unprivileged user to cause a denial of service by     a kernel lockup via a crafted ioctl call for a     '/dev/dri/renderD*' device.(CVE-2017-7346i1/4%0

  - It was found that the NFSv4 server in the Linux kernel     did not properly validate layout type when processing     NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands. A     remote attacker could use this flaw to soft-lockup the     system and thus cause denial of     service.(CVE-2017-8797i1/4%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 linux update issued as DLA-1731-1 caused a regression in the vmxnet3 (VMware virtual network adapter) driver. This update corrects that regression, and an earlier regression in the CIFS network filesystem implementation introduced in DLA-1422-1. For reference the original advisory text follows.

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

CVE-2016-10741

A race condition was discovered in XFS that would result in a crash (BUG). A local user permitted to write to an XFS volume could use this for denial of service.

CVE-2017-5753

Further instances of code that was vulnerable to Spectre variant 1 (bounds-check bypass) have been mitigated.

CVE-2017-13305

A memory over-read was discovered in the keys subsystem's encrypted key type. A local user could use this for denial of service or possibly to read sensitive information.

CVE-2018-3639 (SSB)

Multiple researchers have discovered that Speculative Store Bypass (SSB), a feature implemented in many processors, could be used to read sensitive information from another context. In particular, code in a software sandbox may be able to read sensitive information from outside the sandbox. This issue is also known as Spectre variant 4.

This update fixes bugs in the mitigations for SSB for AMD processors.

CVE-2018-5848

The wil6210 wifi driver did not properly validate lengths in scan and connection requests, leading to a possible buffer overflow. On systems using this driver, a local user with the CAP_NET_ADMIN capability could use this for denial of service (memory corruption or crash) or potentially for privilege escalation.

CVE-2018-5953

The swiotlb subsystem printed kernel memory addresses to the system log, which could help a local attacker to exploit other vulnerabilities.

CVE-2018-12896, CVE-2018-13053

Team OWL337 reported possible integer overflows in the POSIX timer implementation. These might have some security impact.

CVE-2018-16862

Vasily Averin and Pavel Tikhomirov from Virtuozzo Kernel Team discovered that the cleancache memory management feature did not invalidate cached data for deleted files. On Xen guests using the tmem driver, local users could potentially read data from other users' deleted files if they were able to create new files on the same volume.

CVE-2018-16884

A flaw was found in the NFS 4.1 client implementation. Mounting NFS shares in multiple network namespaces at the same time could lead to a user-after-free. Local users might be able to use this for denial of service (memory corruption or crash) or possibly for privilege escalation.

This can be mitigated by disabling unprivileged users from creating user namespaces, which is the default in Debian.

CVE-2018-17972

Jann Horn reported that the /proc/*/stack files in procfs leaked sensitive data from the kernel. These files are now only readable by users with the CAP_SYS_ADMIN capability (usually only root)

CVE-2018-18281

Jann Horn reported a race condition in the virtual memory manager that can result in a process briefly having access to memory after it is freed and reallocated. A local user permitted to create containers could possibly exploit this for denial of service (memory corruption) or for privilege escalation.

CVE-2018-18690

Kanda Motohiro reported that XFS did not correctly handle some xattr (extended attribute) writes that require changing the disk format of the xattr. A user with access to an XFS volume could use this for denial of service.

CVE-2018-18710

It was discovered that the cdrom driver does not correctly validate the parameter to the CDROM_SELECT_DISC ioctl. A user with access to a cdrom device could use this to read sensitive information from the kernel or to cause a denial of service (crash).

CVE-2018-19824

Hui Peng and Mathias Payer discovered a use-after-free bug in the USB audio driver. A physically present attacker able to attach a specially designed USB device could use this for privilege escalation.

CVE-2018-19985

Hui Peng and Mathias Payer discovered a missing bounds check in the hso USB serial driver. A physically present user able to attach a specially designed USB device could use this to read sensitive information from the kernel or to cause a denial of service (crash).

CVE-2018-20169

Hui Peng and Mathias Payer discovered missing bounds checks in the USB core. A physically present attacker able to attach a specially designed USB device could use this to cause a denial of service (crash) or possibly for privilege escalation.

CVE-2018-20511

InfoSect reported an information leak in the AppleTalk IP/DDP implemntation. A local user with CAP_NET_ADMIN capability could use this to read sensitive information from the kernel.

CVE-2019-3701

Muyu Yu and Marcus Meissner reported that the CAN gateway implementation allowed the frame length to be modified, typically resulting in out-of-bounds memory-mapped I/O writes. On a system with CAN devices present, a local user with CAP_NET_ADMIN capability in the initial net namespace could use this to cause a crash (oops) or other hardware-dependent impact.

CVE-2019-3819

A potential infinite loop was discovered in the HID debugfs interface exposed under /sys/kernel/debug/hid. A user with access to these files could use this for denial of service.

This interface is only accessible to root by default, which fully mitigates the issue.

CVE-2019-6974

Jann Horn reported a use-after-free bug in KVM. A local user with access to /dev/kvm could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation.

CVE-2019-7221

Jim Mattson and Felix Wilhelm reported a user-after-free bug in KVM's nested VMX implementation. On systems with Intel CPUs, a local user with access to /dev/kvm could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation.

Nested VMX is disabled by default, which fully mitigates the issue.

CVE-2019-7222

Felix Wilhelm reported an information leak in KVM for x86. A local user with access to /dev/kvm could use this to read sensitive information from the kernel.

CVE-2019-9213

Jann Horn reported that privileged tasks could cause stack segments, including those in other processes, to grow downward to address 0. On systems lacking SMAP (x86) or PAN (ARM), this exacerbated other vulnerabilities: a NULL pointer dereference could be exploited for privilege escalation rather than only for denial of service.

For Debian 8 'Jessie', these problems have been fixed in version 3.16.64-1.

We recommend that you upgrade your linux packages.

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

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

  - A security flaw was found in the ip_frag_reasm()     function in net/ipv4/ip_fragment.c in the Linux kernel     which can cause a later system crash in     ip_do_fragment(). With certain non-default, but     non-rare, configuration of a victim host, an attacker     can trigger this crash remotely, thus leading to a     remote denial of service.(CVE-2018-14641)

  - 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)

  - 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)

  - A use-after-free vulnerability was found in the way the     Linux kernel's KVM hypervisor emulates a preemption     timer for L2 guests when nested (=1) virtualization is     enabled. This high resolution timer(hrtimer) runs when     a L2 guest is active. After VM exit, the sync_vmcs12()     timer object is stopped. The use-after-free occurs if     the timer object is freed before calling sync_vmcs12()     routine. A guest user/process could use this flaw to     crash the host kernel resulting in a denial of service     or, potentially, gain privileged access to a system.
    (CVE-2019-7221)

  - An information leakage issue was found in the way Linux     kernel's KVM hypervisor handled page fault exceptions     while emulating instructions like VMXON, VMCLEAR,     VMPTRLD, and VMWRITE with memory address as an operand.
    It occurs if the operand is a mmio address, as the     returned exception object holds uninitialized stack     memory contents. A guest user/process could use this     flaw to leak host's stack memory contents to a guest.
    (CVE-2019-7222)

  - The xfs_dinode_verify function in     fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel can     cause a NULL pointer dereference in     xfs_ilock_attr_map_shared function. An attacker could     trick a legitimate user or a privileged attacker could     exploit this by mounting a crafted xfs filesystem image     to cause a kernel panic and thus a denial of service.
    (CVE-2018-10322)

  - The Linux kernel is vulnerable to a NULL pointer     dereference in the     ext4/mballoc.c:ext4_process_freed_data() function. An     attacker could trick a legitimate user or a privileged     attacker could exploit this by mounting a crafted ext4     image to cause a kernel panic.(CVE-2018-1092)

  - The Linux kernel is vulnerable to a NULL pointer     dereference in the ext4/xattr.c:ext4_xattr_inode_hash()     function. An attacker could trick a legitimate user or     a privileged attacker could exploit this to cause a     NULL pointer dereference with a crafted ext4 image.
    (CVE-2018-1094)

  - An issue was discovered in the XFS filesystem in     fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel. A     NULL pointer dereference may occur for a corrupted xfs     image after xfs_da_shrink_inode() is called with a NULL     bp. This can lead to a system crash and a denial of     service. (CVE-2018-13094)

  - A flaw was found in the Linux kernel with files on     tmpfs and hugetlbfs. An attacker is able to bypass file     permissions on filesystems mounted with tmpfs/hugetlbs     to modify a file and possibly disrupt normal system     behavior. At this time there is an understanding there     is no crash or privilege escalation but the impact of     modifications on these filesystems of files in     production systems may have adverse affects.
    (CVE-2018-18397)

  - A use-after-free flaw can occur in the Linux kernel due     to a race condition between packet_do_bind() and     packet_notifier() functions called for an AF_PACKET     socket. An unprivileged, local user could use this flaw     to induce kernel memory corruption on the system,     leading to an unresponsive system or to a crash. Due to     the nature of the flaw, privilege escalation cannot be     fully ruled out. (CVE-2018-18559)

  - A flaw was found In the Linux kernel, through version     4.19.6, where a local user could exploit a     use-after-free in the ALSA driver by supplying a     malicious USB Sound device (with zero interfaces) that     is mishandled in usb_audio_probe in sound/usb/card.c.
    An attacker could corrupt memory and possibly escalate     privileges if the attacker is able to have physical     access to the system.(CVE-2018-19824)

  - An issue was discovered in the Linux kernel before     4.18.11. The ipddp_ioctl function in     drivers/net/appletalk/ipddp.c allows local users to     obtain sensitive kernel address information by     leveraging CAP_NET_ADMIN to read the ipddp_route dev     and next fields via an SIOCFINDIPDDPRT ioctl call.
    (CVE-2018-20511)

  - A use-after-free vulnerability was found in the way the     Linux kernel's KVM hypervisor implements its device     control API. While creating a device via     kvm_ioctl_create_device(), the device holds a reference     to a VM object, later this reference is transferred to     the caller's file descriptor table. If such file     descriptor was to be closed, reference count to the VM     object could become zero, potentially leading to a     use-after-free issue. A user/process could use this     flaw to crash the guest VM resulting in a denial of     service issue or, potentially, gain privileged access     to a system. (CVE-2019-6974)

  - Since Linux kernel version 3.2, the mremap() syscall     performs TLB flushes after dropping pagetable locks. If     a syscall such as ftruncate() removes entries from the     pagetables of a task that is in the middle of mremap(),     a stale TLB entry can remain for a short time that     permits access to a physical page after it has been     released back to the page allocator and     reused.(CVE-2018-18281)

  - 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-2017-18360)

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.

New kernel packages are available for Slackware 14.2 to fix security issues.

ID	Name	Product	Family	Severity
131845	EulerOS 2.0 SP2 : kernel (EulerOS-SA-2019-2353)	Nessus	Huawei Local Security Checks	critical
128478	Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel (AWS) vulnerabilities (USN-4118-1)	Nessus	Ubuntu Local Security Checks	critical
127889	Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4094-1)	Nessus	Ubuntu Local Security Checks	critical
125514	EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-1587)	Nessus	Huawei Local Security Checks	high
124806	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1482)	Nessus	Huawei Local Security Checks	high
123420	Debian DLA-1731-2 : linux regression update (Spectre)	Nessus	Debian Local Security Checks	high
122699	EulerOS 2.0 SP5 : kernel (EulerOS-SA-2019-1076)	Nessus	Huawei Local Security Checks	high
121505	Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01)	Nessus	Slackware Local Security Checks	high

Detections

Analytics

CVE-2018-20511

medium

Tenable Plugins

critical

critical

critical

high

high

high

high

high