The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:2925 advisory.

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

    Security Fix(es):

    * A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4     and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment     reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a     denial of service on the system. (CVE-2018-5391)

    * kernel: mm: use-after-free in do_get_mempolicy function allows local DoS or other unspecified impact     (CVE-2018-10675)

    * kernel: Integer overflow in Linux's create_elf_tables function (CVE-2018-14634)

    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 Juha-Matti Tilli (Aalto University - Department of Communications and     Networking and Nokia Bell Labs) for reporting CVE-2018-5391 and Qualys Research Labs for reporting     CVE-2018-14634.

    Bug Fix(es):

    * Previously, the kernel source code lacked support to report the Speculative Store Bypass Disable (SSBD)     vulnerability status on IBM Power Systems. As a consequence, the     /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file incorrectly reported Not affected. This     fix updates the kernel source code to properly report the SSBD status either as Vulnerable or     Mitigation: Kernel entry/exit barrier (TYPE), where TYPE is one of eieio, hwsync, fallback, or     unknown. (BZ#1615873)

    * After updating the system to prevent the L1 Terminal Fault (L1TF) vulnerability, only one thread was     detected on systems that offer processing of two threads on a single processor core. With this update, the
    __max_smt_threads() function has been fixed. As a result, both threads are now detected correctly in the     described situation. (BZ#1625335)

    * Previously, a kernel panic occurred when the kernel tried to make an out of bound access to the array     that describes the L1 Terminal Fault (L1TF) mitigation state on systems without Extended Page Tables (EPT)     support. This update extends the array of mitigation states to cover all the states, which effectively     prevents out of bound array access. Also, this update enables rejecting invalid, irrelevant values, that     might be erroneously provided by the userspace. As a result, the kernel no longer panics in the described     scenario. (BZ#1629634)

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 6 : kernel (RHSA-2018:2925)

high Nessus Plugin ID 118164

Version 1.13

Version 1.12

Version 1.13 Nov 5, 2024, 12:50 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202411051250
Version 1.12 Apr 28, 2024, 2:25 PM Detection (updated detection logic) Plugin metadata Reference Plugin Feed: 202404281425