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Red Hat Enterprise Linux 7: RHSA-2020-2104-01 Important: Kernel-Alt DoS Fix

red hat
Calendar Grey May 12, 2020
Dist Redhat Esm H88
Kernel updates and security patches are crucial for Red Hat. A significant notice for Enterprise Linux 7 has been issued.
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):
* kernel: double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c (CVE-2017-18595)
* kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c (CVE-2019-19768)
* Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic (CVE-2020-10711)
* kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)
* kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)
* kernel: denial of service in in xfs_setattr_nonsize in fs/xfs/xfs_iops.c (CVE-2019-15538)
* 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: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free (CVE-2019-19524)
* kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c (CVE-2020-9383)
* kernel: null pointer dereference in dlpar_parse_cc_property in arch/powerrc/platforms/pseries/dlpar.c causing denial of service (CVE-2019-12614)
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):
* [7.5-alt][ext4/xfstests generic/468] fix fdatasync(2) after fallocate(2) operation (upstream fixed) [rhel-alt-7.6.z] (BZ#1554273)
* [RHEL-ALT-7.6.z][arm64] CN99xx: DIMM errors not populated in EDAC sysfs (BZ#1778697)

Topics%20covered

Topics Covered

security advisory security issue bug fix DoS Red Hat Enterprise Linux important kernel-alt

References

https://access.redhat.com/security/cve/CVE-2017-18551 https://access.redhat.com/security/cve/CVE-2017-18595 https://access.redhat.com/security/cve/CVE-2019-9454 https://access.redhat.com/security/cve/CVE-2019-12614 https://access.redhat.com/security/cve/CVE-2019-15538 https://access.redhat.com/security/cve/CVE-2019-19447 https://access.redhat.com/security/cve/CVE-2019-19524 https://access.redhat.com/security/cve/CVE-2019-19768 https://access.redhat.com/security/cve/CVE-2020-9383 https://access.redhat.com/security/cve/CVE-2020-10711 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source: kernel-alt-4.14.0-115.21.2.el7a.src.rpm
aarch64: kernel-4.14.0-115.21.2.el7a.aarch64.rpm kernel-debug-4.14.0-115.21.2.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-115.21.2.el7a.aarch64.rpm kernel-debug-devel-4.14.0-115.21.2.el7a.aarch64.rpm kernel-debuginfo-4.14.0-115.21.2.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-115.21.2.el7a.aarch64.rpm kernel-devel-4.14.0-115.21.2.el7a.aarch64.rpm kernel-headers-4.14.0-115.21.2.el7a.aarch64.rpm kernel-tools-4.14.0-115.21.2.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-115.21.2.el7a.aarch64.rpm kernel-tools-libs-4.14.0-115.21.2.el7a.aarch64.rpm perf-4.14.0-115.21.2.el7a.aarch64.rpm perf-debuginfo-4.14.0-115.21.2.el7a.aarch64.rpm python-perf-4.14.0-115.21.2.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-115.21.2.el7a.aarch64.rpm
noarch: kernel-abi-whitelists-4.14.0-115.21.2.el7a.noarch.rpm kernel-doc-4.14.0-115.21.2.el7a.noarch.rpm
ppc64le: kernel-4.14.0-115.21.2.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-115.21.2.el7a.ppc64le.rpm kernel-debug-4.14.0-115.21.2.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-115.21.2.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-115.21.2.el7a.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:2104-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2104
Issue date: 2020-05-12

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 security issue bug fix DoS Red Hat Enterprise Linux important 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

1718176 - CVE-2019-12614 kernel: null pointer dereference in dlpar_parse_cc_property in arch/powerrc/platforms/pseries/dlpar.c causing denial of service

1746777 - CVE-2019-15538 kernel: denial of service in in xfs_setattr_nonsize in fs/xfs/xfs_iops.c

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

1758671 - CVE-2017-18595 kernel: double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.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

1783459 - CVE-2019-19524 kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free

1786164 - CVE-2019-19768 kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c

1810685 - CVE-2020-9383 kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c

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

1825116 - CVE-2020-10711 Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic

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