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

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

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

    Security Fix(es):

    * An industry-wide issue was found in the way many modern microprocessor designs have implemented     speculative execution of instructions (a commonly used performance optimization). There are three primary     variants of the issue which differ in the way the speculative execution can be exploited.

    Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies     on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact     that memory accesses may cause allocation into the microprocessor's data cache even for speculatively     executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use     this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted     cache side-channel attacks. (CVE-2017-5715, Important, ARM)

    Variant CVE-2017-5753 triggers the speculative execution by performing a bounds-check bypass. It relies on     the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that     memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed     instructions that never actually commit (retire). As a result, an unprivileged attacker could use this     flaw to cross the syscall boundary and read privileged memory by conducting targeted cache side-channel     attacks. (CVE-2017-5753, Important, ARM)

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

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

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

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

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

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

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

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

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

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

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

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

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

    Additional Changes:

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

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

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

Detections

Analytics

RHEL 7 : kernel-alt (RHSA-2018:0654)

high Nessus Plugin ID 108942

Version 1.17

Version 1.16

Version 1.15

Version 1.14

Version 1.13

Version 1.17 Nov 12, 2024, 8:09 AM Exploit attributes ("Exploit framework canvas" set to "True") Exploit attributes ("Exploited by malware" set to "True") Plugin Feed: 202411120809
Version 1.16 May 29, 2024, 9:59 PM Plugin metadata Plugin Feed: 202405292159
Version 1.15 Apr 28, 2024, 3:17 AM CVE (set "CVE" coverage to "CVE-2017-1000255,CVE-2017-1000410,CVE-2017-11473,CVE-2017-12190,CVE-2017-12192,CVE-2017-15129,CVE-2017-15299,CVE-2017-15306,CVE-2017-16939,CVE-2017-17448,CVE-2017-17449,CVE-2017-5753,CVE-2018-1000004,CVE-2018-6927") CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:H/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:H/RL:O/RC:C") Detection (updated detection logic) Plugin metadata Plugin Feed: 202404280317
Version 1.14 Feb 7, 2024, 10:01 PM Detection (updated detection logic) Plugin Feed: 202402072201
Version 1.13 Jan 18, 2024, 8:01 PM CVSSv2 score source (set to "CVE-2017-16939") CVSSv3 score source (set to "CVE-2018-6927") Detection (updated detection logic) Plugin metadata Reference Plugin Feed: 202401182001