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AUSCERT External Security Bulletin Redistribution
ESB-2019.2753.2
Linux kernel vulnerabilities
2 August 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11884 CVE-2019-11833 CVE-2019-11815
CVE-2019-11599 CVE-2019-11487 CVE-2019-11085
Reference: ESB-2019.2661
ESB-2019.2626
ESB-2019.2597
ESB-2019.2593
Original Bulletin:
https://usn.ubuntu.com/4068-1/
https://usn.ubuntu.com/4068-2/
https://usn.ubuntu.com/4069-1/
https://usn.ubuntu.com/4069-2/
Comment: This bulletin contains four (4) Ubuntu security advisories.
Revision History: August 2 2019: corresponding bulletin released for
Ubuntu 18.04 LTS
July 24 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4068-1: Linux kernel vulnerabilities
23 July 2019
linux, linux-aws, linux-gcp, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon 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 - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-kvm - Linux kernel for cloud environments
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
Details
Adam Zabrocki discovered that the Intel i915 kernel mode graphics driver in the
Linux kernel did not properly restrict mmap() ranges in some situations. A
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-11085)
It was discovered that a race condition leading to a use-after-free existed in
the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-11815)
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 Bluetooth Human Interface Device Protocol (HIDP)
implementation in the Linux kernel did not properly verify strings were NULL
terminated in certain situations. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2019-11884)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
linux-image-4.15.0-1018-oracle - 4.15.0-1018.20
linux-image-4.15.0-1037-gcp - 4.15.0-1037.39
linux-image-4.15.0-1039-kvm - 4.15.0-1039.39
linux-image-4.15.0-1041-raspi2 - 4.15.0-1041.44
linux-image-4.15.0-1044-aws - 4.15.0-1044.46
linux-image-4.15.0-1058-snapdragon - 4.15.0-1058.64
linux-image-4.15.0-55-generic - 4.15.0-55.60
linux-image-4.15.0-55-generic-lpae - 4.15.0-55.60
linux-image-4.15.0-55-lowlatency - 4.15.0-55.60
linux-image-aws - 4.15.0.1044.43
linux-image-gcp - 4.15.0.1037.39
linux-image-generic - 4.15.0.55.57
linux-image-generic-lpae - 4.15.0.55.57
linux-image-kvm - 4.15.0.1039.39
linux-image-lowlatency - 4.15.0.55.57
linux-image-oracle - 4.15.0.1018.21
linux-image-powerpc-e500mc - 4.15.0.55.57
linux-image-powerpc-smp - 4.15.0.55.57
linux-image-powerpc64-emb - 4.15.0.55.57
linux-image-powerpc64-smp - 4.15.0.55.57
linux-image-raspi2 - 4.15.0.1041.39
linux-image-snapdragon - 4.15.0.1058.61
linux-image-virtual - 4.15.0.55.57
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-2019-11085
o CVE-2019-11815
o CVE-2019-11833
o CVE-2019-11884
- --------------------------------------------------------------------------------
USN-4068-2: Linux kernel (HWE) vulnerabilities
23 July 2019
linux-hwe, linux-gcp 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-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-hwe - Linux hardware enablement (HWE) kernel
Details
USN-4068-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This
update provides the corresponding updates for the Linux Hardware Enablement
(HWE) kernel from Ubuntu 18.04 for Ubuntu 16.04 LTS.
Adam Zabrocki discovered that the Intel i915 kernel mode graphics driver in the
Linux kernel did not properly restrict mmap() ranges in some situations. A
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-11085)
It was discovered that a race condition leading to a use-after-free existed in
the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a
local attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2019-11815)
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 Bluetooth Human Interface Device Protocol (HIDP)
implementation in the Linux kernel did not properly verify strings were NULL
terminated in certain situations. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2019-11884)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.15.0-1037-gcp - 4.15.0-1037.39~16.04.1
linux-image-4.15.0-55-generic - 4.15.0-55.60~16.04.2
linux-image-4.15.0-55-generic-lpae - 4.15.0-55.60~16.04.2
linux-image-4.15.0-55-lowlatency - 4.15.0-55.60~16.04.2
linux-image-gcp - 4.15.0.1037.51
linux-image-generic-hwe-16.04 - 4.15.0.55.76
linux-image-generic-lpae-hwe-16.04 - 4.15.0.55.76
linux-image-gke - 4.15.0.1037.51
linux-image-lowlatency-hwe-16.04 - 4.15.0.55.76
linux-image-oem - 4.15.0.55.76
linux-image-virtual-hwe-16.04 - 4.15.0.55.76
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-4068-1
o CVE-2019-11085
o CVE-2019-11815
o CVE-2019-11833
o CVE-2019-11884
- --------------------------------------------------------------------------------
USN-4069-1: Linux kernel vulnerabilities
23 July 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
It was discovered that an integer overflow existed in the Linux kernel when
reference counting pages, leading to potential use-after-free issues. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-11487)
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 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 Bluetooth Human Interface Device Protocol (HIDP)
implementation in the Linux kernel did not properly verify strings were NULL
terminated in certain situations. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2019-11884)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
linux-image-5.0.0-1011-aws - 5.0.0-1011.12
linux-image-5.0.0-1011-gcp - 5.0.0-1011.11
linux-image-5.0.0-1011-kvm - 5.0.0-1011.12
linux-image-5.0.0-1012-azure - 5.0.0-1012.12
linux-image-5.0.0-1013-raspi2 - 5.0.0-1013.13
linux-image-5.0.0-1017-snapdragon - 5.0.0-1017.18
linux-image-5.0.0-21-generic - 5.0.0-21.22
linux-image-5.0.0-21-generic-lpae - 5.0.0-21.22
linux-image-5.0.0-21-lowlatency - 5.0.0-21.22
linux-image-aws - 5.0.0.1011.11
linux-image-azure - 5.0.0.1012.11
linux-image-gcp - 5.0.0.1011.11
linux-image-generic - 5.0.0.21.22
linux-image-generic-lpae - 5.0.0.21.22
linux-image-gke - 5.0.0.1011.11
linux-image-kvm - 5.0.0.1011.11
linux-image-lowlatency - 5.0.0.21.22
linux-image-raspi2 - 5.0.0.1013.10
linux-image-snapdragon - 5.0.0.1017.10
linux-image-virtual - 5.0.0.21.22
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-2019-11487
o CVE-2019-11599
o CVE-2019-11833
o CVE-2019-11884
- -------------------------------------------------------------------------------
USN-4069-2: Linux kernel (HWE) vulnerabilities
1 August 2019
linux-hwe 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-hwe - Linux hardware enablement (HWE) kernel
Details
USN-4069-1 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.
It was discovered that an integer overflow existed in the Linux kernel when
reference counting pages, leading to potential use-after-free issues. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-11487)
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 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 Bluetooth Human Interface Device Protocol (HIDP)
implementation in the Linux kernel did not properly verify strings were NULL
terminated in certain situations. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2019-11884)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
linux-image-5.0.0-23-generic - 5.0.0-23.24~18.04.1
linux-image-5.0.0-23-generic-lpae - 5.0.0-23.24~18.04.1
linux-image-5.0.0-23-lowlatency - 5.0.0-23.24~18.04.1
linux-image-generic-hwe-18.04 - 5.0.0.23.80
linux-image-generic-lpae-hwe-18.04 - 5.0.0.23.80
linux-image-lowlatency-hwe-18.04 - 5.0.0.23.80
linux-image-snapdragon-hwe-18.04 - 5.0.0.23.80
linux-image-virtual-hwe-18.04 - 5.0.0.23.80
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-4069-1
o CVE-2019-11487
o CVE-2019-11599
o CVE-2019-11833
o CVE-2019-11884
- --------------------------END INCLUDED TEXT--------------------
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