Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.3897.2
USN-4157-1: Linux kernel vulnerabilities
22 October 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-16714 CVE-2019-15902 CVE-2019-15505
CVE-2019-15504 CVE-2019-14821 CVE-2019-14816
CVE-2019-14815 CVE-2019-14814 CVE-2019-2181
Reference: ESB-2019.3757
ESB-2019.3505.3
Original Bulletin:
https://usn.ubuntu.com/4157-1/
https://usn.ubuntu.com/4157-2/
Comment: This bulletin contains two (2) Ubuntu security advisories.
Revision History: October 22 2019: Added USN-4157-2
October 18 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4157-1: Linux kernel vulnerabilities
17 October 2019
linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
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-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) 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
Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel
did not properly perform bounds checking, leading to a heap overflow. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816)
Matt Delco discovered that the KVM hypervisor implementation in the Linux
kernel did not properly perform bounds checking when handling coalesced MMIO
write operations. A local attacker with write access to /dev/kvm could use this
to cause a denial of service (system crash). (CVE-2019-14821)
Hui Peng and Mathias Payer discovered that the 91x Wi-Fi driver in the Linux
kernel did not properly handle error conditions on initialization, leading to a
double-free vulnerability. A physically proximate attacker could use this to
cause a denial of service (system crash). (CVE-2019-15504)
It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux
kernel contained a buffer overread. A physically proximate attacker could use
this to cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2019-15505)
Brad Spengler discovered that a Spectre mitigation was improperly implemented
in the ptrace susbsystem of the Linux kernel. A local attacker could possibly
use this to expose sensitive information. (CVE-2019-15902)
It was discovered that the IPv6 RDS implementation in the Linux kernel did not
properly initialize fields in a data structure returned to user space. A local
attacker could use this to expose sensitive information (kernel memory). Please
note that the RDS protocol is blacklisted in Ubuntu by default.
(CVE-2019-16714)
It was discovered that an integer overflow existed in the Binder implementation
of the Linux kernel, leading to a buffer overflow. A local attacker could use
this to escalate privileges. (CVE-2019-2181)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
linux-image-5.0.0-1019-aws - 5.0.0-1019.21
linux-image-5.0.0-1020-kvm - 5.0.0-1020.21
linux-image-5.0.0-1020-raspi2 - 5.0.0-1020.20
linux-image-5.0.0-1021-gcp - 5.0.0-1021.21
linux-image-5.0.0-1023-azure - 5.0.0-1023.24
linux-image-5.0.0-1024-snapdragon - 5.0.0-1024.25
linux-image-5.0.0-32-generic - 5.0.0-32.34
linux-image-5.0.0-32-generic-lpae - 5.0.0-32.34
linux-image-5.0.0-32-lowlatency - 5.0.0-32.34
linux-image-aws - 5.0.0.1019.20
linux-image-azure - 5.0.0.1023.22
linux-image-gcp - 5.0.0.1021.47
linux-image-generic - 5.0.0.32.33
linux-image-generic-lpae - 5.0.0.32.33
linux-image-gke - 5.0.0.1021.47
linux-image-kvm - 5.0.0.1020.20
linux-image-lowlatency - 5.0.0.32.33
linux-image-raspi2 - 5.0.0.1020.17
linux-image-snapdragon - 5.0.0.1024.17
linux-image-virtual - 5.0.0.32.33
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-2019-14814
o CVE-2019-14815
o CVE-2019-14816
o CVE-2019-14821
o CVE-2019-15504
o CVE-2019-15505
o CVE-2019-15902
o CVE-2019-16714
o CVE-2019-2181
===============================================================================
USN-4157-2: Linux kernel (HWE) vulnerabilities
22 October 2019
linux-hwe, linux-azure, linux-gcp, linux-gke-5.0 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
o linux-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
o linux-hwe - Linux hardware enablement (HWE) kernel
Details
USN-4157-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.04. This
update provides the corresponding updates for the Linux Hardware Enablement
(HWE) kernel from Ubuntu 19.04 for Ubuntu 18.04 LTS.
Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel
did not properly perform bounds checking, leading to a heap overflow. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816)
Matt Delco discovered that the KVM hypervisor implementation in the Linux
kernel did not properly perform bounds checking when handling coalesced MMIO
write operations. A local attacker with write access to /dev/kvm could use this
to cause a denial of service (system crash). (CVE-2019-14821)
Hui Peng and Mathias Payer discovered that the 91x Wi-Fi driver in the Linux
kernel did not properly handle error conditions on initialization, leading to a
double-free vulnerability. A physically proximate attacker could use this to
cause a denial of service (system crash). (CVE-2019-15504)
It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux
kernel contained a buffer overread. A physically proximate attacker could use
this to cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2019-15505)
Brad Spengler discovered that a Spectre mitigation was improperly implemented
in the ptrace susbsystem of the Linux kernel. A local attacker could possibly
use this to expose sensitive information. (CVE-2019-15902)
It was discovered that the IPv6 RDS implementation in the Linux kernel did not
properly initialize fields in a data structure returned to user space. A local
attacker could use this to expose sensitive information (kernel memory). Please
note that the RDS protocol is blacklisted in Ubuntu by default.
(CVE-2019-16714)
It was discovered that an integer overflow existed in the Binder implementation
of the Linux kernel, leading to a buffer overflow. A local attacker could use
this to escalate privileges. (CVE-2019-2181)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
linux-image-5.0.0-1021-gcp - 5.0.0-1021.21~18.04.1
linux-image-5.0.0-1023-azure - 5.0.0-1023.24~18.04.1
linux-image-5.0.0-1023-gke - 5.0.0-1023.23~18.04.2
linux-image-5.0.0-32-generic - 5.0.0-32.34~18.04.2
linux-image-5.0.0-32-generic-lpae - 5.0.0-32.34~18.04.2
linux-image-5.0.0-32-lowlatency - 5.0.0-32.34~18.04.2
linux-image-azure - 5.0.0.1023.33
linux-image-gcp - 5.0.0.1021.26
linux-image-generic-hwe-18.04 - 5.0.0.32.89
linux-image-generic-lpae-hwe-18.04 - 5.0.0.32.89
linux-image-gke-5.0 - 5.0.0.1023.12
linux-image-lowlatency-hwe-18.04 - 5.0.0.32.89
linux-image-snapdragon-hwe-18.04 - 5.0.0.32.89
linux-image-virtual-hwe-18.04 - 5.0.0.32.89
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-4157-1
o CVE-2019-14814
o CVE-2019-14815
o CVE-2019-14816
o CVE-2019-14821
o CVE-2019-15504
o CVE-2019-15505
o CVE-2019-15902
o CVE-2019-16714
o CVE-2019-2181
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQIVAwUBXa6J3maOgq3Tt24GAQhNNhAAyX9doX2OK5JM/hg1ZYzIzmWaGx4v92XR
6rYCwuZvO/9FfzFM3SouTQpm8rpP0Rc8N2Kqv+mBLNvJCWNMr3TGSGkazIqFrHjV
tLD7xsMlyET/a+KIQvA6F8wYO7mVbv+fU+PCPbkBs7AUo+H8mZebCH3QFaI9vYDu
Z6APrtOU57fWMesX39idbHjypLPwEe/IYEYGSeufj8mkE4mtt0bu4pq5l+kCC1nt
1YSBaSaXOpEt0+dE3QNkm782BQW5WEryG8rVCIeXPH6fHAij8hYJLA4NKpywMbvQ
dIF67wue9reJwdr81mEbX6/q6GlGMnLKRl0qbvxA7tagCzvPwiFvtIdIUAIePZgf
4p6owNkDT+uPSwMTItUvXTTqQ8F1Jj8TaZYg+ddUHJKAizQ6ttR4a5Hfq64q/d6T
z7fjb1gTqVtMyT7Al1VCCkkW1KJyRWmuFK+TsySYKvRLEnT++TM5hvzJWr5Hr47q
GK9G5UQEC4ILG9mSqEuy3NOaPkFMtouhu3uUg3vjIIcZXA9TbPnjm9gbk3uKAKd9
4bOktua0tqXH41VDe+UC9zn/ASyGjT4271iIIrhPs6fnyd+2q00dvLlAwGhHm5SZ
6dg7/oEBywkw4wHlnLThxH1hbvwyZn0PB33H6IpUPrWCT6Aviacc2Lss8NIwHLyd
HIzi+HW0Eo4=
=bN3K
-----END PGP SIGNATURE-----