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RedHat: RHSA-2019-3979-01 Important: Kernel Critical Buffer Overflow

red hat
Calendar Grey November 26, 2019
Dist Redhat Esm H88
The significant kernel patch from Red Hat tackles various security vulnerabilities, such as stack overflows and elevation of privileges.
An update for kernel 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
* kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)
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):
* On RHEL 7.7 kernel SCSI VPD information for NVMe drives is missing (breaks InfoScale) (BZ#1752423)
* RHEL7 fnic spamming logs: Current vnic speed set to : 40000 (BZ#1754836)
* kernel build: parallelize redhat/mod-sign.sh (BZ#1755330)
* kernel build: speed up module compression step (BZ#1755339)
* Nested VirtualBox VMs on Windows guest has the potential of impacting memory region allocated to other KVM guests (BZ#1755781)
* NULL pointer dereference at check_preempt_wakeup+0x109 (BZ#1756265)
* Regression: panic in pick_next_task_rt (BZ#1756267)
* ixgbe reports "Detected Tx Unit Hang" with adapter reset on RHEL 7 (BZ#1757350)
* [Intel 7.8 Bug] [KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM. (BZ#1757757)
* nvme: dead loop in blk_mq_tagset_wait_completed_request() when it is called from timeout handler (BZ#1758051)
* [mlx5] VF Representer naming is not consistent/persistent through reboots with OSPD deployment (BZ#1759003)
* OS getting restarted because of driver issue with QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA [1077:2532] (rev 02). (BZ#1759447)
* mlx5: Load balancing not working over VF LAG configuration (BZ#1759449)
* RHEL7.8 - ISST-LTE: vimlp1: Running LTP af_alg04.c (crypto) crash the LPAR (BZ#1763620)
* RHEL7.5 - Fix security issues on crypto vmx (BZ#1763621)
* RHEL 7.7 RC1 - Host crashes about 4.5 hours into switch port bounce test (BZ#1763624)
* RHEL7.6 - cacheinfo code unsafe vs LPM (BZ#1763625)
* xfs hangs on acquiring xfs_buf semaphore (BZ#1764245)
* single CPU VM hangs during open_posix_testsuite (BZ#1766087)
* rcu_sched self-detected stall on CPU while booting with nohz_full (BZ#1766098)

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow critical privilege escalation bug fix kernel

References

https://access.redhat.com/security/cve/CVE-2019-14821 https://access.redhat.com/security/cve/CVE-2019-15239 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-1062.7.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.7.1.el7.noarch.rpm kernel-doc-3.10.0-1062.7.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.7.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.7.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.7.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.7.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.7.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.7.1.el7.x86_64.rpm perf-3.10.0-1062.7.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm python-perf-3.10.0-1062.7.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.7.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.7.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:3979-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:3979
Issue date: 2019-11-26

Topic

An update for kernel 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 Red Hat buffer overflow critical privilege escalation bug fix kernel

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer

1747353 - CVE-2019-15239 kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation

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