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Red Hat: RHSA-2019-3220-01 Important Kernel Security Update DoS Risks

red hat
Calendar Grey October 29, 2019
Dist Redhat Esm H88
Crucial kernel security patch for Red Hat Enterprise Linux 7.6, including bug resolutions and fixes for known vulnerabilities.
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Imp...

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: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900)
* hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB) (CVE-2019-9506)
* 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):
* [mlx4] VXLAN over VLAN TCP segmentation (BZ#1734325)
* Race condition in /dev/sg due to missing synchronization causes corruption in RHV (BZ#1737378)
* [FJ7.6 Bug]: [REG] kernel: ipc: ipc_free should use kvfree (BZ#1740177)
* high update_cfs_rq_blocked_load contention (BZ#1740179)
* kvm: backport cpuidle-haltpoll driver (BZ#1740191)
* Growing unreclaimable slab memory (BZ#1741919)
* [Hyper-V]vPCI devices cannot allocate IRQs vectors in a Hyper-V VM with > 240 vCPUs (i.e., when in x2APIC mode) (BZ#1743323)
* NFSv4.0 client sending a double CLOSE (leading to EIO application failure) (BZ#1744945)
* powerpc/pseries: Fix unitialized timer reset on migration / powerpc/pseries/mobility: Extend start/stop topology update scope (LPM) (BZ#1745441)
* ISST-LTE:PVM:Zeppelin :LPM: Failure logs and stack trace seen during LPM (POWER9/P9) (BZ#1745448)
* [LLNL 7.5 Bug] slab leak causing a crash when using kmem control group (BZ#1748237)
* [Azure] CRI-RDOS | [RHEL 7.8] Live migration only takes 10 seconds, but the VM was unavailable for 2 hours (BZ#1748238)
* Allows macvlan to operate correctly over the active-backup mode to support bonding events (BZ#1749291)
* debug kernel reports scheduling while atomic bug in EFI code (BZ#1755324)

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS important kernel

References

https://access.redhat.com/security/cve/CVE-2019-1125 https://access.redhat.com/security/cve/CVE-2019-3900 https://access.redhat.com/security/cve/CVE-2019-9506 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/articles/4329821

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.38.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.38.1.el7.noarch.rpm kernel-doc-3.10.0-957.38.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.38.1.el7.x86_64.rpm kernel-3.10.0-957.38.1.el7.x86_64.rpm kernel-debug-3.10.0-957.38.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.38.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.38.1.el7.x86_64.rpm kernel-devel-3.10.0-957.38.1.el7.x86_64.rpm kernel-headers-3.10.0-957.38.1.el7.x86_64.rpm kernel-tools-3.10.0-957.38.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.38.1.el7.x86_64.rpm perf-3.10.0-957.38.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm python-perf-3.10.0-957.38.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.38.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.38.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:3220-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:3220
Issue date: 2019-10-29

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support.

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.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS important kernel

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

1698757 - CVE-2019-3900 Kernel: vhost_net: infinite loop while receiving packets leads to DoS

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

1727857 - CVE-2019-9506 hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB)

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