The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3910-2 advisory.

    USN-3910-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu     14.04 LTS.

    It was discovered that the f2fs filesystem implementation in the Linux kernel did not handle the     noflush_merge mount option correctly. An attacker could use this to cause a denial of service (system     crash). (CVE-2017-18241)

    It was discovered that the procfs filesystem did not properly handle processes mapping some memory     elements onto files. A local attacker could use this to block utilities that examine the procfs filesystem     to report operating system state, such as ps(1). (CVE-2018-1120)

    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)

    It was discovered that multiple integer overflows existed in the hugetlbfs implementation in the Linux     kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-7740)

    Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker     could use this to gain access to services that cache authorizations. (CVE-2019-6133)

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 version of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - By mmap()ing a FUSE-backed file onto a process's memory     containing command line arguments (or environment     strings), an attacker can cause utilities from psutils     or procps (such as ps, w) or any other program which     makes a read()

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/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a     process's memory containing command line arguments (or environment strings), an attacker can cause     utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the     /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some     controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:3804 advisory.

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

    Security Fix(es):

    * kernel: fuse-backed file mmap-ed onto process cmdline arguments causes denial of service (CVE-2018-1120)

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

    Bug Fix(es):

    * [RHEL-7.9] Kdump failed to start when secure boot enabled:  kexec_file_load failed: Required key not     available (BZ#1866968)

    * Kernel bug report in cgroups on heavily contested 3.10 node (BZ#1869506)

    * System gets crashed with hard lockup after a corruption found in wait queue list [bnx2fc] (BZ#1870595)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Linux 4.9 has been packaged for Debian 8 as linux-4.9. This provides a supported upgrade path for systems that currently use kernel packages from the 'jessie-backports' suite.

There is no need to upgrade systems using Linux 3.16, as that kernel version will also continue to be supported in the LTS period.

This backport does not include the following binary packages :

hyperv-daemons libcpupower1 libcpupower-dev libusbip-dev linux-compiler-gcc-4.9-x86 linux-cpupower linux-libc-dev usbip

Older versions of most of those are built from other source packages in Debian 8.

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

CVE-2017-5753

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

CVE-2017-18255

It was discovered that the performance events subsystem did not properly validate the value of the kernel.perf_cpu_time_max_percent sysctl. Setting a large value could have an unspecified security impact. However, only a privileged user can set this sysctl.

CVE-2018-1118

The syzbot software found that the vhost driver did not initialise message buffers which would later be read by user processes. A user with access to the /dev/vhost-net device could use this to read sensitive information from the kernel or other users' processes.

CVE-2018-1120

Qualys reported that a user able to mount FUSE filesystems can create a process such that when another process attempting to read its command line will be blocked for an arbitrarily long time. This could be used for denial of service, or to aid in exploiting a race condition in the other program.

CVE-2018-1130

The syzbot software found that the DCCP implementation of sendmsg() does not check the socket state, potentially leading to a NULL pointer dereference. A local user could use this to cause a denial of service (crash). 

CVE-2018-3639

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 allows the issue to be mitigated on some x86 processors by disabling SSB. This requires an update to the processor's microcode, which is non-free. It may be included in an update to the system BIOS or UEFI firmware, or in a future update to the intel-microcode or amd64-microcode packages.

Disabling SSB can reduce performance significantly, so by default it is only done in tasks that use the seccomp feature. Applications that require this mitigation should request it explicitly through the prctl() system call. Users can control where the mitigation is enabled with the spec_store_bypass_disable kernel parameter.

CVE-2018-5814

Jakub Jirasek reported race conditions in the USB/IP host driver. A malicious client could use this to cause a denial of service (crash or memory corruption), and possibly to execute code, on a USB/IP server.

CVE-2018-10021

A physically present attacker who unplugs a SAS cable can cause a denial of service (memory leak and WARN).

CVE-2018-10087, CVE-2018-10124

zhongjiang found that the wait4() and kill() system call implementations did not check for the invalid pid value of INT_MIN. If a user passed this value, the behaviour of the code was formally undefined and might have had a security impact.

CVE-2018-10853

Andy Lutomirski and Mika Penttil&auml; reported that KVM for x86 processors did not perform a necessary privilege check when emulating certain instructions. This could be used by an unprivileged user in a guest VM to escalate their privileges within the guest.

CVE-2018-10876, CVE-2018-10877, CVE-2018-10878, CVE-2018-10879, CVE-2018-10880, CVE-2018-10881, CVE-2018-10882, CVE-2018-10883

Wen Xu at SSLab, Gatech, reported that crafted ext4 filesystem images could trigger a crash or memory corruption. A local user able to mount arbitrary filesystems, or an attacker providing filesystems to be mounted, could use this for denial of service or possibly for privilege escalation.

CVE-2018-10940

Dan Carpenter reported that the optical disc driver (cdrom) does not correctly validate the parameter to the CDROM_MEDIA_CHANGED ioctl. A user with access to a cdrom device could use this to cause a denial of service (crash).

CVE-2018-11506

Piotr Gabriel Kosinski and Daniel Shapira reported that the SCSI optical disc driver (sr) did not allocate a sufficiently large buffer for sense data. A user with access to a SCSI optical disc device that can produce more than 64 bytes of sense data could use this to cause a denial of service (crash or memory corruption), and possibly for privilege escalation.

CVE-2018-12233

Shankara Pailoor reported that a crafted JFS filesystem image could trigger a denial of service (memory corruption). This could possibly also be used for privilege escalation.

CVE-2018-1000204

The syzbot software found that the SCSI generic driver (sg) would in some circumstances allow reading data from uninitialised buffers, which could include sensitive information from the kernel or other tasks. However, only privileged users with the CAP_SYS_ADMIN or CAP_SYS_RAWIO capability were allowed to do this, so this has little or no security impact.

For Debian 8 'Jessie', these problems have been fixed in version 4.9.110-1~deb8u1. This update additionally fixes Debian bugs #860900, #872907, #892057, #896775, #897590, and #898137; and includes many more bug fixes from stable updates 4.9.89-4.9.110 inclusive.

We recommend that you upgrade your linux-4.9 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.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2018-3083 advisory.

    - [fs] exec: Limit arg stack to at most 75 of _STK_LIM (Yauheni Kaliuta) [1625991] {CVE-2018-14634}
    - [fs] exec: account for argv/envp pointers (Yauheni Kaliuta) [1625991] {CVE-2018-14634}
    - [cdrom] information leak in cdrom_ioctl_media_changed() (Sanskriti Sharma) [1578207] {CVE-2018-10940}
    - [fs] fs: get_rock_ridge_filename(): handle malformed NM entries (Bill O'Donnell) [1340778]     {CVE-2016-4913}
    - [mm] madvise: fix madvise() infinite loop under special circumstances (Rafael Aquini) [1552982]     {CVE-2017-18208}
    - [kernel] posix-timer: Properly check sigevent->sigev_notify (Phil Auld) [1613711] {CVE-2017-18344}
    - [sound] alsa: rawmidi: Change resized buffers atomically (Denys Vlasenko) [1593087] {CVE-2018-10902}
    - [fs] Fix up non-directory creation in SGID directories (Miklos Szeredi) [1600953] {CVE-2018-13405}
    - [scsi] libsas: fix memory leak in sas_smp_get_phy_events() (Tomas Henzl) [1558582] {CVE-2018-7757}
    - [vhost] fix info leak due to uninitialized memory (Jason Wang) [1573705] {CVE-2018-1118}
    - [net] ip: process in-order fragments efficiently (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] ipv6: defrag: drop non-last frags smaller than min mtu (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] ip: use rb trees for IP frag queue (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] revert ipv4: use skb coalescing in defragmentation (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] modify skb_rbtree_purge to return the truesize of all purged skbs (Sabrina Dubroca) [1613924]     {CVE-2018-5391}
    - [net] ip: discard IPv4 datagrams with overlapping segments (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [net] speed up skb_rbtree_purge() (Sabrina Dubroca) [1613924] {CVE-2018-5391}
    - [fs] timerfd: Protect the might cancel mechanism proper (Bill O'Donnell) [1485407] {CVE-2017-10661}
    - [netdrv] bnx2x: disable GSO where gso_size is too big for hardware (Jonathan Toppins) [1546760]     {CVE-2018-1000026}
    - [net] create skb_gso_validate_mac_len() (Jonathan Toppins) [1546760] {CVE-2018-1000026}
    - [fs] aio: properly check iovec sizes (Jeff Moyer) [1337518] {CVE-2015-8830}
    - [fs] ext4: avoid running out of journal credits when appending to an inline file (Lukas Czerner)     [1609759] {CVE-2018-10883}
    - [fs] jbd2: don't mark block as modified if the handle is out of credits (Lukas Czerner) [1609759]     {CVE-2018-10883}

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.

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

An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update 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 read privileged memory by conducting targeted cache side-channel attacks.(CVE-2018-3639)

By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).(CVE-2018-1120)

An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update 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 influence speculative execution and/or read privileged memory by conducting targeted cache side-channel attacks.(CVE-2018-3693)

According to the version of the vzkernel package and the readykernel-patch installed, the Virtuozzo installation on the remote host is affected by the following vulnerability :

  - By mmap()ing a FUSE-backed file onto a process's memory     containing command line arguments (or environment     strings), an attacker can cause utilities from psutils     or procps (such as ps, w) or any other program which     makes a read() call to the /proc/<pid>/cmdline (or     /proc/<pid>/environ) files to block indefinitely     (denial of service) or for some controlled time (as a     synchronization primitive for other attacks).

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

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3752-2 advisory.

    USN-3752-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the     corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu     16.04 LTS.

    It was discovered that, when attempting to handle an out-of-memory situation, a null pointer dereference     could be triggered in the Linux kernel in some circumstances. A local attacker could use this to cause a     denial of service (system crash). (CVE-2018-1000200)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly validate     meta-data information. An attacker could use this to construct a malicious xfs image that, when mounted,     could cause a denial of service (system crash). (CVE-2018-10323)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly validate     xattr information. An attacker could use this to construct a malicious xfs image that, when mounted, could     cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10840)

    Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep meta-     data information consistent in some situations. An attacker could use this to construct a malicious ext4     image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10881)

    Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle     corrupted meta data in some situations. An attacker could use this to specially craft an ext4 filesystem     that caused a denial of service (system crash) when mounted. (CVE-2018-1093)

    Jann Horn discovered that the Linux kernel's implementation of random seed data reported that it was in a     ready state before it had gathered sufficient entropy. An attacker could use this to expose sensitive     information. (CVE-2018-1108)

    It was discovered that the procfs filesystem did not properly handle processes mapping some memory     elements onto files. A local attacker could use this to block utilities that examine the procfs filesystem     to report operating system state, such as ps(1). (CVE-2018-1120)

    Jann Horn discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep     xattr information consistent in some situations. An attacker could use this to construct a malicious ext4     image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary     code. (CVE-2018-11412)

    Piotr Gabriel Kosinski and Daniel Shapira discovered a stack-based buffer overflow in the CDROM driver     implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2018-11506)

    Shankara Pailoor discovered that a race condition existed in the socket handling code in the Linux kernel.
    A local attacker could use this to cause a denial of service (system crash). (CVE-2018-12232)

    Shankara Pailoor discovered that the JFS filesystem implementation in the Linux kernel contained a buffer     overflow when handling extended attributes. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2018-12233)

    Felix Wilhelm discovered that the KVM implementation in the Linux kernel did not properly perform     permission checks in some situations when nested virtualization is used. An attacker in a guest VM could     possibly use this to escape into an outer VM or the host OS. (CVE-2018-12904)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly handle an     error condition with a corrupted xfs image. An attacker could use this to construct a malicious xfs image     that, when mounted, could cause a denial of service (system crash). (CVE-2018-13094)

    It was discovered that the Linux kernel did not properly handle setgid file creation when performed by a     non-member of the group. A local attacker could use this to gain elevated privileges. (CVE-2018-13405)

    Silvio Cesare discovered that the generic VESA frame buffer driver in the Linux kernel contained an     integer overflow. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2018-13406)

    Jakub Jirasek discovered that multiple use-after-free errors existed in the USB/IP implementation in the     Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2018-5814)

    It was discovered that a race condition existed in the ARM Advanced Microcontroller Bus Architecture     (AMBA) driver in the Linux kernel that could result in a double free. A local attacker could use this to     cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-9415)

    It was discovered that an information leak existed in the generic SCSI driver in the Linux kernel. A local     attacker could use this to expose sensitive information (kernel memory). (CVE-2018-1000204)

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 v4.16.10 update contains important fixes across the tree

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

A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks). (CVE-2018-1120)

Impact

An attacker with local access may be able to cause a Denial of Service (DoS).

ID	Name	Product	Family	Published	Updated	Severity
122893	Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3910-2)	Nessus	Ubuntu Local Security Checks	3/18/2019	3/20/2025	medium
124832	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1510)	Nessus	Huawei Local Security Checks	5/13/2019	3/20/2025	medium
222149	Linux Distros Unpatched Vulnerability : CVE-2018-1120	Nessus	Misc.	3/4/2025	8/8/2025	medium
140745	RHEL 7 : kernel (RHSA-2020:3804)	Nessus	Red Hat Local Security Checks	9/23/2020	2/20/2025	medium
111165	Debian DLA-1423-1 : linux-4.9 new package (Spectre)	Nessus	Debian Local Security Checks	7/20/2018	9/4/2024	high
118770	Oracle Linux 7 : kernel (ELSA-2018-3083)	Nessus	Oracle Linux Local Security Checks	11/7/2018	10/24/2024	high
121505	Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01)	Nessus	Slackware Local Security Checks	1/31/2019	6/25/2024	high
110455	Amazon Linux 2 : kernel (ALAS-2018-1038) (Spectre)	Nessus	Amazon Linux Local Security Checks	6/12/2018	9/24/2024	medium
111104	Virtuozzo 7 : readykernel-patch (VZA-2018-046)	Nessus	Virtuozzo Local Security Checks	7/16/2018	3/27/2025	medium
112110	Ubuntu 16.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3752-2)	Nessus	Ubuntu Local Security Checks	8/24/2018	8/27/2024	high
120599	Fedora 28 : kernel (2018-8ce90c8b24)	Nessus	Fedora Local Security Checks	1/3/2019	3/21/2025	medium
150194	F5 Networks BIG-IP : Linux kernel vulnerability (K42202505)	Nessus	F5 Networks Local Security Checks	6/3/2021	2/20/2025	medium

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