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Red Hat 7.6 RHSA-2020:5656-01 Moderate: Kernel Denial Of Service

red hat
Calendar Grey December 22, 2020
Dist Redhat Esm H88
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ====================================================
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support

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):
* kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)
* kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)
* kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)
* kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c (CVE-2019-19046)
* kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c (CVE-2019-19447)
* kernel: out-of-bounds write via crafted keycode table (CVE-2019-20636)
* kernel: sg_write function lacks an sg_remove_request call in a certain failure case (CVE-2020-12770)
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.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat risk management privilege escalation Red Hat Enterprise Linux moderate severity kernel Denial of Service Denial Of Service kernel security update

References

https://access.redhat.com/security/cve/CVE-2017-18551 https://access.redhat.com/security/cve/CVE-2018-20836 https://access.redhat.com/security/cve/CVE-2019-9454 https://access.redhat.com/security/cve/CVE-2019-19046 https://access.redhat.com/security/cve/CVE-2019-19447 https://access.redhat.com/security/cve/CVE-2019-20636 https://access.redhat.com/security/cve/CVE-2020-12770 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.65.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.65.1.el7.noarch.rpm kernel-doc-3.10.0-957.65.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.65.1.el7.x86_64.rpm kernel-3.10.0-957.65.1.el7.x86_64.rpm kernel-debug-3.10.0-957.65.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.65.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm kernel-devel-3.10.0-957.65.1.el7.x86_64.rpm kernel-headers-3.10.0-957.65.1.el7.x86_64.rpm kernel-tools-3.10.0-957.65.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.65.1.el7.x86_64.rpm perf-3.10.0-957.65.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm python-perf-3.10.0-957.65.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:5656-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5656
Issue date: 2020-12-22

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat risk management privilege escalation Red Hat Enterprise Linux moderate severity kernel Denial of Service Denial Of Service kernel security update

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

Bugs Fixed

1707796 - CVE-2018-20836 kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free

1757368 - CVE-2017-18551 kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c

1774988 - CVE-2019-19046 kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c

1781679 - CVE-2019-19447 kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c

1818818 - CVE-2019-9454 kernel: out of bounds write in i2c driver leads to local escalation of privilege

1824059 - CVE-2019-20636 kernel: out-of-bounds write via crafted keycode table

1834845 - CVE-2020-12770 kernel: sg_write function lacks an sg_remove_request call in a certain failure case

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