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AUSCERT External Security Bulletin Redistribution
ESB-2019.3108
USN-4094-1: Linux kernel vulnerabilities
14 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-13272 CVE-2019-13233 CVE-2019-12984
CVE-2019-12819 CVE-2019-12818 CVE-2019-12614
CVE-2019-10126 CVE-2019-3846 CVE-2019-2101
CVE-2019-2024 CVE-2019-1125 CVE-2018-20856
CVE-2018-20511 CVE-2018-20169 CVE-2018-16862
CVE-2018-14617 CVE-2018-14616 CVE-2018-14615
CVE-2018-14614 CVE-2018-14613 CVE-2018-14612
CVE-2018-14611 CVE-2018-14610 CVE-2018-14609
CVE-2018-13100 CVE-2018-13099 CVE-2018-13098
CVE-2018-13097 CVE-2018-13096 CVE-2018-13093
CVE-2018-13053 CVE-2018-5383
Reference: ASB-2019.0229
ASB-2019.0153
ESB-2018.1659.2
ESB-2018.1656.2
ESB-2018.1655.2
Original Bulletin:
https://usn.ubuntu.com/4094-1/
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USN-4094-1: Linux kernel vulnerabilities
13 August 2019
linux, linux-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux - Linux kernel
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
o linux-kvm - Linux kernel for cloud environments
o linux-oem - Linux kernel for OEM processors
o linux-oracle - Linux kernel for Oracle Cloud systems
o linux-raspi2 - Linux kernel for Raspberry Pi 2
o linux-snapdragon - Linux kernel for Snapdragon processors
o linux-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-hwe - Linux hardware enablement (HWE) kernel
Details
It was discovered that the alarmtimer implementation in the Linux kernel
contained an integer overflow vulnerability. A local attacker could use this to
cause a denial of service. (CVE-2018-13053)
Wen Xu discovered that the XFS filesystem implementation in the Linux kernel
did not properly track inode validations. An attacker could use this to
construct a malicious XFS image that, when mounted, could cause a denial of
service (system crash). (CVE-2018-13093)
Wen Xu discovered that the f2fs file system implementation in the Linux kernel
did not properly validate metadata. An attacker could use this to construct a
malicious f2fs image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100,
CVE-2018-14614, CVE-2018-14616, CVE-2018-13096, CVE-2018-13098, CVE-2018-14615)
Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation in
the Linux kernel did not properly validate metadata. An attacker could use this
to construct a malicious btrfs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-14610, CVE-2018-14611, CVE-2018-14612,
CVE-2018-14613, CVE-2018-14609)
Wen Xu discovered that the HFS+ filesystem implementation in the Linux kernel
did not properly handle malformed catalog data in some situations. An attacker
could use this to construct a malicious HFS+ image that, when mounted, could
cause a denial of service (system crash). (CVE-2018-14617)
Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of
the Linux kernel did not properly initialize new files in some situations. A
local attacker could use this to expose sensitive information. (CVE-2018-16862)
Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux
kernel did not properly handle size checks when handling an extra USB
descriptor. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2018-20169)
It was discovered that a use-after-free error existed in the block layer
subsystem of the Linux kernel when certain failure conditions occurred. A local
attacker could possibly use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-20856)
Eli Biham and Lior Neumann discovered that the Bluetooth implementation in the
Linux kernel did not properly validate elliptic curve parameters during
Diffie-Hellman key exchange in some situations. An attacker could use this to
expose sensitive information. (CVE-2018-5383)
It was discovered that a heap buffer overflow existed in the Marvell Wireless
LAN device driver for the Linux kernel. An attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-10126)
Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors incorrectly
handle SWAPGS instructions during speculative execution. A local attacker could
use this to expose sensitive information (kernel memory). (CVE-2019-1125)
It was discovered that the PowerPC dlpar implementation in the Linux kernel did
not properly check for allocation errors in some situations. A local attacker
could possibly use this to cause a denial of service (system crash).
(CVE-2019-12614)
It was discovered that a NULL pointer dereference vulnerabilty existed in the
Near-field communication (NFC) implementation in the Linux kernel. An attacker
could use this to cause a denial of service (system crash). (CVE-2019-12818)
It was discovered that the MDIO bus devices subsystem in the Linux kernel
improperly dropped a device reference in an error condition, leading to a
use-after-free. An attacker could use this to cause a denial of service (system
crash). (CVE-2019-12819)
It was discovered that a NULL pointer dereference vulnerability existed in the
Near-field communication (NFC) implementation in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2019-12984)
Jann Horn discovered a use-after-free vulnerability in the Linux kernel when
accessing LDT entries in some situations. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-13233)
Jann Horn discovered that the ptrace implementation in the Linux kernel did not
properly record credentials in some situations. A local attacker could use this
to cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2019-13272)
It was discovered that the Empia EM28xx DVB USB device driver implementation in
the Linux kernel contained a use-after-free vulnerability when disconnecting
the device. An attacker could use this to cause a denial of service (system
crash). (CVE-2019-2024)
It was discovered that the USB video device class implementation in the Linux
kernel did not properly validate control bits, resulting in an out of bounds
buffer read. A local attacker could use this to possibly expose sensitive
information (kernel memory). (CVE-2019-2101)
It was discovered that the Marvell Wireless LAN device driver in the Linux
kernel did not properly validate the BSS descriptor. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-3846)
It was discovered that the Appletalk IP encapsulation driver in the Linux
kernel did not properly prevent kernel addresses from being copied to user
space. A local attacker with the CAP_NET_ADMIN capability could use this to
expose sensitive information. (CVE-2018-20511)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
linux-image-4.15.0-1021-oracle - 4.15.0-1021.23
linux-image-4.15.0-1040-gcp - 4.15.0-1040.42
linux-image-4.15.0-1040-gke - 4.15.0-1040.42
linux-image-4.15.0-1042-kvm - 4.15.0-1042.42
linux-image-4.15.0-1043-raspi2 - 4.15.0-1043.46
linux-image-4.15.0-1050-oem - 4.15.0-1050.57
linux-image-4.15.0-1060-snapdragon - 4.15.0-1060.66
linux-image-4.15.0-58-generic - 4.15.0-58.64
linux-image-4.15.0-58-generic-lpae - 4.15.0-58.64
linux-image-4.15.0-58-lowlatency - 4.15.0-58.64
linux-image-gcp - 4.15.0.1040.42
linux-image-generic - 4.15.0.58.60
linux-image-generic-lpae - 4.15.0.58.60
linux-image-gke - 4.15.0.1040.43
linux-image-gke-4.15 - 4.15.0.1040.43
linux-image-kvm - 4.15.0.1042.42
linux-image-lowlatency - 4.15.0.58.60
linux-image-oem - 4.15.0.1050.54
linux-image-oracle - 4.15.0.1021.24
linux-image-powerpc-e500mc - 4.15.0.58.60
linux-image-powerpc-smp - 4.15.0.58.60
linux-image-powerpc64-emb - 4.15.0.58.60
linux-image-powerpc64-smp - 4.15.0.58.60
linux-image-raspi2 - 4.15.0.1043.41
linux-image-snapdragon - 4.15.0.1060.63
linux-image-virtual - 4.15.0.58.60
Ubuntu 16.04 LTS
linux-image-4.15.0-1021-oracle - 4.15.0-1021.23~16.04.1
linux-image-4.15.0-1040-gcp - 4.15.0-1040.42~16.04.1
linux-image-4.15.0-1055-azure - 4.15.0-1055.60
linux-image-4.15.0-58-generic - 4.15.0-58.64~16.04.1
linux-image-4.15.0-58-generic-lpae - 4.15.0-58.64~16.04.1
linux-image-4.15.0-58-lowlatency - 4.15.0-58.64~16.04.1
linux-image-azure - 4.15.0.1055.58
linux-image-gcp - 4.15.0.1040.54
linux-image-generic-hwe-16.04 - 4.15.0.58.79
linux-image-generic-lpae-hwe-16.04 - 4.15.0.58.79
linux-image-gke - 4.15.0.1040.54
linux-image-lowlatency-hwe-16.04 - 4.15.0.58.79
linux-image-oem - 4.15.0.58.79
linux-image-oracle - 4.15.0.1021.15
linux-image-virtual-hwe-16.04 - 4.15.0.58.79
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
After a standard system update you need to reboot your computer to make all the
necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have been given
a new version number, which requires you to recompile and reinstall all third
party kernel modules you might have installed. Unless you manually uninstalled
the standard kernel metapackages (e.g. linux-generic,
linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system
upgrade will automatically perform this as well.
References
o CVE-2018-13053
o CVE-2018-13093
o CVE-2018-13096
o CVE-2018-13097
o CVE-2018-13098
o CVE-2018-13099
o CVE-2018-13100
o CVE-2018-14609
o CVE-2018-14610
o CVE-2018-14611
o CVE-2018-14612
o CVE-2018-14613
o CVE-2018-14614
o CVE-2018-14615
o CVE-2018-14616
o CVE-2018-14617
o CVE-2018-16862
o CVE-2018-20169
o CVE-2018-20511
o CVE-2018-20856
o CVE-2018-5383
o CVE-2019-10126
o CVE-2019-1125
o CVE-2019-12614
o CVE-2019-12818
o CVE-2019-12819
o CVE-2019-12984
o CVE-2019-13233
o CVE-2019-13272
o CVE-2019-2024
o CVE-2019-2101
o CVE-2019-3846
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