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RedHat: RHSA-2019-2862-01 Important: Buffer Overflow Security Fix

red hat
Calendar Grey September 23, 2019
Dist Redhat Esm H88
A significant kernel-alt security notice for Red Hat Enterprise Linux 7 tackling a severe buffer overflow vulnerability.
An update for kernel-alt is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Summary

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

Topics%20covered

Topics Covered

security advisory update buffer overflow Red Hat Enterprise Linux important security impact kernel-alt

References

https://access.redhat.com/security/cve/CVE-2019-14835 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/kernel-vhost

Package List

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source: kernel-alt-4.14.0-115.13.1.el7a.src.rpm
aarch64: kernel-4.14.0-115.13.1.el7a.aarch64.rpm kernel-debug-4.14.0-115.13.1.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-115.13.1.el7a.aarch64.rpm kernel-debug-devel-4.14.0-115.13.1.el7a.aarch64.rpm kernel-debuginfo-4.14.0-115.13.1.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-115.13.1.el7a.aarch64.rpm kernel-devel-4.14.0-115.13.1.el7a.aarch64.rpm kernel-headers-4.14.0-115.13.1.el7a.aarch64.rpm kernel-tools-4.14.0-115.13.1.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-115.13.1.el7a.aarch64.rpm kernel-tools-libs-4.14.0-115.13.1.el7a.aarch64.rpm perf-4.14.0-115.13.1.el7a.aarch64.rpm perf-debuginfo-4.14.0-115.13.1.el7a.aarch64.rpm python-perf-4.14.0-115.13.1.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-115.13.1.el7a.aarch64.rpm
noarch: kernel-abi-whitelists-4.14.0-115.13.1.el7a.noarch.rpm kernel-doc-4.14.0-115.13.1.el7a.noarch.rpm
ppc64le: kernel-4.14.0-115.13.1.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-115.13.1.el7a.ppc64le.rpm kernel-debug-4.14.0-115.13.1.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-115.13.1.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-115.13.1.el7a.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2862-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2862
Issue date: 2019-09-23

Topic

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update buffer overflow Red Hat Enterprise Linux important security impact kernel-alt

Relevant Releases Architectures

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le

Bugs Fixed

1750727 - CVE-2019-14835 kernel: vhost-net: guest to host kernel escape during migration

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