RHEL 7 : kpatch-patch (RHSA-2019:2865)

high Nessus Plugin ID 129270
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for kpatch-patch is now available for RHEL-7.6.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel.

Security Fix(es) :

* A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. (CVE-2019-14835)

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.

Solution

Update the affected kpatch-patch-3_10_0-957_35_1 and / or kpatch-patch-3_10_0-957_35_1-debuginfo packages.

See Also

https://access.redhat.com/security/vulnerabilities/kernel-vhost

https://access.redhat.com/errata/RHSA-2019:2865

https://access.redhat.com/security/cve/cve-2019-14835

Plugin Details

Severity: High

ID: 129270

File Name: redhat-RHSA-2019-2865.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/24/2019

Updated: 12/24/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_35_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_35_1-debuginfo, cpe:/o:redhat:enterprise_linux:7.6

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 9/23/2019

Vulnerability Publication Date: 9/17/2019

Reference Information

CVE: CVE-2019-14835

RHSA: 2019:2865