The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:2403 advisory.

    The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include     redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH)     are installed using a special build of Red Hat Enterprise Linux with only the packages required to host     virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and     performing administrative tasks.

    Security Fix(es):

    * Modern operating systems implement virtualization of physical memory to efficiently use available system     resources and provide inter-domain protection through access control and isolation. The L1TF issue was     found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a     commonly used performance optimisation) in combination with handling of page-faults caused by terminated     virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw     to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host     memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646)

    * A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A     remote attacker could use this flaw to trigger time and calculation expensive calls to     tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within     ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system.
    Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open     port, thus the attacks cannot be performed using spoofed IP addresses. (CVE-2018-5390)

    Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and     Juha-Matti Tilli (Aalto University, Department of Communications and Networking and Nokia Bell Labs) for     reporting CVE-2018-5390.

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 : redhat-virtualization-host (RHSA-2018:2403)

medium Nessus Plugin ID 112027

Version 1.9

Version 1.8

Version 1.9 Jun 3, 2024, 4:41 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202406031641
Version 1.8 Apr 28, 2024, 3:17 AM CVSS metrics ("CVSSv2 score" set to 4.7) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N") CVSS metrics ("CVSSv3 score" set to 5.6) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N") CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C") CVSSv2 score source (set to "CVE-2018-3646") CVSSv2 severity (based on CVE-2018-3646, severity decreased from "High" to "Medium") CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Reference Plugin Feed: 202404280317