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RedHat: RHSA-2019-0831-01 Important Kernel-Alt Security Fixes

red hat
Calendar Grey April 23, 2019
Dist Redhat Esm H88
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ====================================================
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: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms (CVE-2019-9213)
* kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c (CVE-2018-14734)
* kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks (CVE-2018-17972)
* kernel: TLB flush happens too late on mremap (CVE-2018-18281)
* kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service (CVE-2018-18386)
* kernel: userfaultfd bypasses tmpfs file permissions (CVE-2018-18397)
* kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053)
* kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094)
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):
* Failed to boot with ftrace=function in kvm with 2vcpu (BZ#1501024)
* [ALT-7.5][x86_64] perf test 63 - inet_pton fails on x86_64 (BZ#1518836)
* BUG: potential out-of-bounds string access when forcing a SELinux label on a file (BZ#1595706)
* stack out-of-bounds in smb{2,3}_create_lease_buf() on SMB2/SMB3 mounts (BZ#1598757)
* [ALT-7.6][KVM][PANIC] ltp/lite proc01 - Unable to handle kernel paging request at virtual address ffff7fe000200018 (BZ#1623193)
* Kernel lock up due to read/write lock (BZ#1636261)
* [RHEL-ALT] Fix potential Spectre v1 in tty code (BZ#1639679)
* [Huawei AArch64 7.6 Bug] HNS3: Vlan on HNS3 NIC cannot communicate (BZ#1639713)
* [RHEL7.6-ALT][AWS] backport "nvme: update timeout module parameter type" (BZ#1654958)
* ignore STABLE_FLAG of rmap_item->address in rmap_walk_ksm (BZ#1663565)
* RHEL-Alt-7.6 - kernel: zcrypt: fix specification exception on z196 at ap probe (BZ#1670018)
* [Huawei AArch64 7.6 Bug] Flock over NFSv3 failed (BZ#1670650)
* [Huawei AArch64 7.6/7.6-z Bug] HNS3: if a single transmit packet(skb) has more than 8 frags, will cause the NIC to be unavailable (BZ#1677643)
* krb5{,i,p} doesn't work with older enctypes on aarch64 (BZ#1678922)
Users of kernel are advised to upgrade to these updated packages, which fix these bugs.

Topics%20covered

Topics Covered

security advisory security issue update Red Hat Enterprise Linux important kernel-alt

References

https://access.redhat.com/security/cve/CVE-2018-13053 https://access.redhat.com/security/cve/CVE-2018-13094 https://access.redhat.com/security/cve/CVE-2018-14734 https://access.redhat.com/security/cve/CVE-2018-17972 https://access.redhat.com/security/cve/CVE-2018-18281 https://access.redhat.com/security/cve/CVE-2018-18386 https://access.redhat.com/security/cve/CVE-2018-18397 https://access.redhat.com/security/cve/CVE-2019-9213 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-4.14.0-115.7.1.el7a.src.rpm
aarch64: kernel-4.14.0-115.7.1.el7a.aarch64.rpm kernel-debug-4.14.0-115.7.1.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm kernel-debug-devel-4.14.0-115.7.1.el7a.aarch64.rpm kernel-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-115.7.1.el7a.aarch64.rpm kernel-devel-4.14.0-115.7.1.el7a.aarch64.rpm kernel-headers-4.14.0-115.7.1.el7a.aarch64.rpm kernel-tools-4.14.0-115.7.1.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm kernel-tools-libs-4.14.0-115.7.1.el7a.aarch64.rpm perf-4.14.0-115.7.1.el7a.aarch64.rpm perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm python-perf-4.14.0-115.7.1.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
noarch: kernel-abi-whitelists-4.14.0-115.7.1.el7a.noarch.rpm kernel-doc-4.14.0-115.7.1.el7a.noarch.rpm
ppc64le: kernel-4.14.0-115.7.1.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-115.7.1.el7a.ppc64le.rpm kernel-debug-4.14.0-115.7.1.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm kernel-debuginfo-common-ppc64le-4.14.0-115.7.1.el7a.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:0831-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0831
Issue date: 2019-04-23

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 update 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

1597747 - CVE-2018-13053 kernel: Integer overflow in the alarm_timer_nsleep function

1597771 - CVE-2018-13094 kernel: NULL pointer dereference in xfs_da_shrink_inode function

1611005 - CVE-2018-14734 kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c

1636349 - CVE-2018-17972 kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks

1640598 - CVE-2018-18386 kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service

1641548 - CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions

1645121 - CVE-2018-18281 kernel: TLB flush happens too late on mremap

1686136 - CVE-2019-9213 kernel: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms

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