The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:1198 advisory.

    Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm packages provide the user-space component for running virtual machines that     use KVM.

    Security Fix(es):

    * 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 load port 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 CPUs 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)

    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.

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 : qemu-kvm (RHSA-2019:1198)

medium Nessus Plugin ID 125128

Version 1.9

Version 1.8

Version 1.7

Version 1.9 Nov 8, 2024, 2:25 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Reference Plugin Feed: 202411080225
Version 1.8 May 28, 2024, 12:26 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C") Exploit attributes ("Exploit available" set to "True") Exploit attributes ("Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Plugin Feed: 202405281226
Version 1.7 Dec 6, 2022, 6:53 AM Reference Plugin Feed: 202212060653