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AUSCERT External Security Bulletin Redistribution
ESB-2019.4271
USN-4186: Linux kernel vulnerabilities
14 November 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Root Compromise -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-17666 CVE-2019-17056 CVE-2019-17055
CVE-2019-17054 CVE-2019-17053 CVE-2019-17052
CVE-2019-16746 CVE-2019-15098 CVE-2019-11135
CVE-2019-2215 CVE-2019-0155 CVE-2019-0154
CVE-2018-12207
Reference: ASB-2019.0322
ASB-2019.0313
ESB-2019.4247
ESB-2019.4246
ESB-2019.3817
Original Bulletin:
https://usn.ubuntu.com/4186-1/
https://usn.ubuntu.com/4186-2/
https://usn.ubuntu.com/4186-3/
Comment: This bulletin contains three (3) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4186-1: Linux kernel vulnerabilities
13 November 2019
linux, linux-aws, linux-kvm 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
Details
Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh
Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp,
Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel
processors using Transactional Synchronization Extensions (TSX) could expose
memory contents previously stored in microarchitectural buffers to a malicious
process that is executing on the same CPU core. A local attacker could use this
to expose sensitive information. (CVE-2019-11135)
It was discovered that the Intel i915 graphics chipsets allowed userspace to
modify page table entries via writes to MMIO from the Blitter Command Streamer
and expose kernel memory information. A local attacker could use this to expose
sensitive information or possibly elevate privileges. (CVE-2019-0155)
Deepak Gupta discovered that on certain Intel processors, the Linux kernel did
not properly perform invalidation on page table updates by virtual guest
operating systems. A local attacker in a guest VM could use this to cause a
denial of service (host system crash). (CVE-2018-12207)
It was discovered that the Intel i915 graphics chipsets could cause a system
hang when userspace performed a read from GT memory mapped input output (MMIO)
when the product is in certain low power states. A local attacker could use
this to cause a denial of service. (CVE-2019-0154)
Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the
Linux kernel did not properly validate endpoint descriptors returned by the
device. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2019-15098)
It was discovered that a buffer overflow existed in the 802.11 Wi-Fi
configuration interface for the Linux kernel when handling beacon settings. A
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-16746)
Ori Nimron discovered that the AX25 network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17052)
Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17053)
Ori Nimron discovered that the Appletalk network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17054)
Ori Nimron discovered that the modular ISDN network protocol implementation in
the Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17055)
Ori Nimron discovered that the Near field Communication (NFC) network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17056)
Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi
driver for the Linux kernel when handling Notice of Absence frames. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-17666)
Maddie Stone discovered that the Binder IPC Driver implementation in the Linux
kernel contained a use-after-free vulnerability. A local attacker could use
this to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-2215)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1062-kvm - 4.4.0-1062.69
linux-image-4.4.0-1098-aws - 4.4.0-1098.109
linux-image-4.4.0-168-generic - 4.4.0-168.197
linux-image-4.4.0-168-generic-lpae - 4.4.0-168.197
linux-image-4.4.0-168-lowlatency - 4.4.0-168.197
linux-image-4.4.0-168-powerpc-e500mc - 4.4.0-168.197
linux-image-4.4.0-168-powerpc-smp - 4.4.0-168.197
linux-image-4.4.0-168-powerpc64-emb - 4.4.0-168.197
linux-image-4.4.0-168-powerpc64-smp - 4.4.0-168.197
linux-image-aws - 4.4.0.1098.102
linux-image-generic - 4.4.0.168.176
linux-image-generic-lpae - 4.4.0.168.176
linux-image-kvm - 4.4.0.1062.62
linux-image-lowlatency - 4.4.0.168.176
linux-image-powerpc-e500mc - 4.4.0.168.176
linux-image-powerpc-smp - 4.4.0.168.176
linux-image-powerpc64-emb - 4.4.0.168.176
linux-image-powerpc64-smp - 4.4.0.168.176
linux-image-virtual - 4.4.0.168.176
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154)
issues requires corresponding microcode and graphics firmware updates
respectively.
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-2018-12207
o CVE-2019-0154
o CVE-2019-0155
o CVE-2019-11135
o CVE-2019-15098
o CVE-2019-16746
o CVE-2019-17052
o CVE-2019-17053
o CVE-2019-17054
o CVE-2019-17055
o CVE-2019-17056
o CVE-2019-17666
o CVE-2019-2215
o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915
=============================================================================
USN-4186-2: Linux kernel (Xenial HWE) vulnerabilities
13 November 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-4186-1 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.
Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh
Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp,
Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel
processors using Transactional Synchronization Extensions (TSX) could expose
memory contents previously stored in microarchitectural buffers to a malicious
process that is executing on the same CPU core. A local attacker could use this
to expose sensitive information. (CVE-2019-11135)
It was discovered that the Intel i915 graphics chipsets allowed userspace to
modify page table entries via writes to MMIO from the Blitter Command Streamer
and expose kernel memory information. A local attacker could use this to expose
sensitive information or possibly elevate privileges. (CVE-2019-0155)
Deepak Gupta discovered that on certain Intel processors, the Linux kernel did
not properly perform invalidation on page table updates by virtual guest
operating systems. A local attacker in a guest VM could use this to cause a
denial of service (host system crash). (CVE-2018-12207)
It was discovered that the Intel i915 graphics chipsets could cause a system
hang when userspace performed a read from GT memory mapped input output (MMIO)
when the product is in certain low power states. A local attacker could use
this to cause a denial of service. (CVE-2019-0154)
Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the
Linux kernel did not properly validate endpoint descriptors returned by the
device. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2019-15098)
Ori Nimron discovered that the AX25 network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17052)
Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17053)
Ori Nimron discovered that the Appletalk network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17054)
Ori Nimron discovered that the modular ISDN network protocol implementation in
the Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17055)
Ori Nimron discovered that the Near field Communication (NFC) network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17056)
Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi
driver for the Linux kernel when handling Notice of Absence frames. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-17666)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
linux-image-4.4.0-1058-aws - 4.4.0-1058.62
linux-image-4.4.0-168-generic - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-generic-lpae - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-lowlatency - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-powerpc-e500mc - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-powerpc-smp - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-powerpc64-emb - 4.4.0-168.197~14.04.1
linux-image-4.4.0-168-powerpc64-smp - 4.4.0-168.197~14.04.1
linux-image-aws - 4.4.0.1058.59
linux-image-generic-lpae-lts-xenial - 4.4.0.168.147
linux-image-generic-lts-xenial - 4.4.0.168.147
linux-image-lowlatency-lts-xenial - 4.4.0.168.147
linux-image-powerpc-e500mc-lts-xenial - 4.4.0.168.147
linux-image-powerpc-smp-lts-xenial - 4.4.0.168.147
linux-image-powerpc64-emb-lts-xenial - 4.4.0.168.147
linux-image-powerpc64-smp-lts-xenial - 4.4.0.168.147
linux-image-virtual-lts-xenial - 4.4.0.168.147
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154)
issues requires corresponding microcode and graphics firmware updates
respectively.
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-4186-1
o CVE-2018-12207
o CVE-2019-0154
o CVE-2019-0155
o CVE-2019-11135
o CVE-2019-15098
o CVE-2019-17052
o CVE-2019-17053
o CVE-2019-17054
o CVE-2019-17055
o CVE-2019-17056
o CVE-2019-17666
o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915
=============================================================================
USN-4186-3: Linux kernel vulnerability
13 November 2019
linux vulnerability
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
Details
USN-4186-1 fixed vulnerabilities in the Linux kernel. It was discovered that
the kernel fix for CVE-2019-0155 (i915 missing Blitter Command Streamer check)
was incomplete on 64-bit Intel x86 systems. This update addresses the issue.
We apologize for the inconvenience.
Original advisory details:
Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh
Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp,
Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel
processors using Transactional Synchronization Extensions (TSX) could expose
memory contents previously stored in microarchitectural buffers to a malicious
process that is executing on the same CPU core. A local attacker could use this
to expose sensitive information. (CVE-2019-11135)
It was discovered that the Intel i915 graphics chipsets allowed userspace to
modify page table entries via writes to MMIO from the Blitter Command Streamer
and expose kernel memory information. A local attacker could use this to expose
sensitive information or possibly elevate privileges. (CVE-2019-0155)
Deepak Gupta discovered that on certain Intel processors, the Linux kernel did
not properly perform invalidation on page table updates by virtual guest
operating systems. A local attacker in a guest VM could use this to cause a
denial of service (host system crash). (CVE-2018-12207)
It was discovered that the Intel i915 graphics chipsets could cause a system
hang when userspace performed a read from GT memory mapped input output (MMIO)
when the product is in certain low power states. A local attacker could use
this to cause a denial of service. (CVE-2019-0154)
Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the
Linux kernel did not properly validate endpoint descriptors returned by the
device. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2019-15098)
It was discovered that a buffer overflow existed in the 802.11 Wi-Fi
configuration interface for the Linux kernel when handling beacon settings. A
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-16746)
Ori Nimron discovered that the AX25 network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17052)
Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17053)
Ori Nimron discovered that the Appletalk network protocol implementation in the
Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17054)
Ori Nimron discovered that the modular ISDN network protocol implementation in
the Linux kernel did not properly perform permissions checks. A local attacker
could use this to create a raw socket. (CVE-2019-17055)
Ori Nimron discovered that the Near field Communication (NFC) network protocol
implementation in the Linux kernel did not properly perform permissions checks.
A local attacker could use this to create a raw socket. (CVE-2019-17056)
Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi
driver for the Linux kernel when handling Notice of Absence frames. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-17666)
Maddie Stone discovered that the Binder IPC Driver implementation in the Linux
kernel contained a use-after-free vulnerability. A local attacker could use
this to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-2215)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-169-generic - 4.4.0-169.198
linux-image-4.4.0-169-generic-lpae - 4.4.0-169.198
linux-image-4.4.0-169-lowlatency - 4.4.0-169.198
linux-image-generic - 4.4.0.169.177
linux-image-generic-lpae - 4.4.0.169.177
linux-image-lowlatency - 4.4.0.169.177
linux-image-virtual - 4.4.0.169.177
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154)
issues requires corresponding microcode and graphics firmware updates
respectively.
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-4186-1
o CVE-2019-0155
o LP: 1852141
- --------------------------END INCLUDED TEXT--------------------
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