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AUSCERT External Security Bulletin Redistribution
ESB-2019.3109
USN-4095-1: Linux kernel vulnerabilities and USN-4095-2:
Linux kernel (Xenial HWE) vulnerabilities
14 August 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Root Compromise -- Console/Physical
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-13272 CVE-2019-12614 CVE-2019-11599
CVE-2019-10126 CVE-2019-9503 CVE-2019-3846
CVE-2019-1125 CVE-2018-5383
Reference: ASB-2019.0229
ASB-2018.0190
ASB-2018.0184
ESB-2019.3102
ESB-2018.1659.2
ESB-2018.1656.2
ESB-2018.1655.2
Original Bulletin:
https://usn.ubuntu.com/4095-1/
https://usn.ubuntu.com/4095-2/
Comment: This bulletin contains two (2) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4095-1: Linux kernel vulnerabilities
13 August 2019
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-kvm - Linux kernel for cloud environments
o linux-raspi2 - Linux kernel for Raspberry Pi 2
o linux-snapdragon - Linux kernel for Snapdragon processors
Details
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)
Jann Horn discovered that a race condition existed in the Linux kernel when
performing core dumps. A local attacker could use this to cause a denial of
service (system crash) or expose sensitive information. (CVE-2019-11599)
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)
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 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)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1054-kvm - 4.4.0-1054.61
linux-image-4.4.0-1090-aws - 4.4.0-1090.101
linux-image-4.4.0-1118-raspi2 - 4.4.0-1118.127
linux-image-4.4.0-1122-snapdragon - 4.4.0-1122.128
linux-image-4.4.0-159-generic - 4.4.0-159.187
linux-image-4.4.0-159-generic-lpae - 4.4.0-159.187
linux-image-4.4.0-159-lowlatency - 4.4.0-159.187
linux-image-4.4.0-159-powerpc-e500mc - 4.4.0-159.187
linux-image-4.4.0-159-powerpc-smp - 4.4.0-159.187
linux-image-4.4.0-159-powerpc64-emb - 4.4.0-159.187
linux-image-4.4.0-159-powerpc64-smp - 4.4.0-159.187
linux-image-aws - 4.4.0.1090.94
linux-image-generic - 4.4.0.159.167
linux-image-generic-lpae - 4.4.0.159.167
linux-image-kvm - 4.4.0.1054.54
linux-image-lowlatency - 4.4.0.159.167
linux-image-powerpc-e500mc - 4.4.0.159.167
linux-image-powerpc-smp - 4.4.0.159.167
linux-image-powerpc64-emb - 4.4.0.159.167
linux-image-powerpc64-smp - 4.4.0.159.167
linux-image-raspi2 - 4.4.0.1118.118
linux-image-snapdragon - 4.4.0.1122.114
linux-image-virtual - 4.4.0.159.167
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-2018-5383
o CVE-2019-10126
o CVE-2019-1125
o CVE-2019-11599
o CVE-2019-12614
o CVE-2019-13272
o CVE-2019-3846
o CVE-2019-9503
- ---
USN-4095-2: Linux kernel (Xenial HWE) vulnerabilities
13 August 2019
linux-lts-xenial, linux-aws vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
USN-4095-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This
update provides the corresponding updates for the Linux Hardware Enablement
(HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM.
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 ext4 file system implementation in the Linux kernel
did not properly zero out memory in some situations. A local attacker could use
this to expose sensitive information (kernel memory). (CVE-2019-11833)
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 the Linux kernel on ARM processors allowed a tracing
process to modify a syscall after a seccomp decision had been made on that
syscall. A local attacker could possibly use this to bypass seccomp
restrictions. (CVE-2019-2054)
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)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
linux-image-4.4.0-1050-aws - 4.4.0-1050.54
linux-image-4.4.0-159-generic - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-generic-lpae - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-lowlatency - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-powerpc-e500mc - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-powerpc-smp - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-powerpc64-emb - 4.4.0-159.187~14.04.1
linux-image-4.4.0-159-powerpc64-smp - 4.4.0-159.187~14.04.1
linux-image-aws - 4.4.0.1050.51
linux-image-generic-lpae-lts-xenial - 4.4.0.159.140
linux-image-generic-lts-xenial - 4.4.0.159.140
linux-image-lowlatency-lts-xenial - 4.4.0.159.140
linux-image-powerpc-e500mc-lts-xenial - 4.4.0.159.140
linux-image-powerpc-smp-lts-xenial - 4.4.0.159.140
linux-image-powerpc64-emb-lts-xenial - 4.4.0.159.140
linux-image-powerpc64-smp-lts-xenial - 4.4.0.159.140
linux-image-virtual-lts-xenial - 4.4.0.159.140
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 USN-4095-1
o CVE-2018-5383
o CVE-2019-10126
o CVE-2019-1125
o CVE-2019-11833
o CVE-2019-12614
o CVE-2019-2054
o CVE-2019-3846
- --------------------------END INCLUDED TEXT--------------------
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The University of Queensland
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