Alerts This Week
Warning Icon 1 714
Alerts This Week
Warning Icon 1 714

Critical Kernel Update for Red Hat Enterprise Linux 7.3: DoS Issues Handled

red hat
Calendar Grey September 25, 2019
Dist Redhat Esm H88
Urgent kernel patch for Red Hat Enterprise Linux 7.3 focusing on significant security vulnerabilities, recommending prompt installation.
An update for kernel is now available for Red Hat Enterprise Linux 7.3 Advanced Update Support, Red Hat Enterprise Linux 7.3 Telco Extended Update Support, and Red Hat Enterprise L...

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 packages contain the Linux kernel, the core of any Linux operating system.
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)
* kernel: hw: Spectre SWAPGS gadget vulnerability (CVE-2019-1125)
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.
Bug Fix(es):
* fs deadlock when a memory allocation waits on page writeback in NOFS context (BZ#1729105)
* fragmented packets timing out (BZ#1729410)
* kernel build: speed up debuginfo extraction (BZ#1731461)
* use "make -jN" for modules_install (BZ#1735080)
* shmem: consider shm_mnt as a long-term mount (BZ#1737375)
* Backport TCP follow-up for small buffers (BZ#1739126)

Topics%20covered

Topics Covered

security advisory bug fix DoS Red Hat Enterprise Linux important kernel

References

https://access.redhat.com/security/cve/CVE-2019-1125 https://access.redhat.com/security/cve/CVE-2019-14835 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/4329821 https://access.redhat.com/security/vulnerabilities/kernel-vhost

Package List

Red Hat Enterprise Linux Server AUS (v. 7.3):
Source: kernel-3.10.0-514.69.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-514.69.1.el7.noarch.rpm kernel-doc-3.10.0-514.69.1.el7.noarch.rpm
x86_64: kernel-3.10.0-514.69.1.el7.x86_64.rpm kernel-debug-3.10.0-514.69.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.69.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.69.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.69.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.69.1.el7.x86_64.rpm kernel-devel-3.10.0-514.69.1.el7.x86_64.rpm kernel-headers-3.10.0-514.69.1.el7.x86_64.rpm kernel-tools-3.10.0-514.69.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.69.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.69.1.el7.x86_64.rpm perf-3.10.0-514.69.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.69.1.el7.x86_64.rpm python-perf-3.10.0-514.69.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.69.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.3):
Source: kernel-3.10.0-514.69.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-514.69.1.el7.noarch.rpm kernel-doc-3.10.0-514.69.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-514.69.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-514.69.1.el7.ppc64le.rpm kernel-debug-3.10.0-514.69.1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2900-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2900
Issue date: 2019-09-25

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.3Advanced Update Support, Red Hat Enterprise Linux 7.3 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.3 Update Services for SAPSolutions.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 bug fix DoS Red Hat Enterprise Linux important kernel

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.3) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.3) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.3) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.3) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.3) - noarch, x86_64

Bugs Fixed

1724389 - CVE-2019-1125 kernel: hw: Spectre SWAPGS gadget vulnerability

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

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here