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AUSCERT External Security Bulletin Redistribution
ESB-2020.1768.2
Ubuntu Linux kernel - multiple vulnerabilities
20 May 2020
===========================================================================
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-2020-12657 CVE-2020-11669 CVE-2020-11668
CVE-2020-11609 CVE-2020-11608 CVE-2020-11565
CVE-2020-11494 CVE-2020-10942 CVE-2019-19060
Reference: ESB-2020.1745.2
ESB-2020.1585
ESB-2020.1475
ESB-2020.1455
Original Bulletin:
https://usn.ubuntu.com/4363-1/
https://usn.ubuntu.com/4364-1/
Revision History: May 20 2020: Vendor released minor updates
May 19 2020: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4368-1: Linux kernel vulnerabilities
19 May 2020
linux-gke-5.0, linux-oem-osp1 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-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
o linux-oem-osp1 - Linux kernel for OEM systems
Details
Tristan Madani discovered that the file locking implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this to
cause a denial of service or expose sensitive information. (CVE-2019-19769)
It was discovered that the Serial CAN interface driver in the Linux kernel did
not properly initialize data. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-11494)
It was discovered that the linux kernel did not properly validate certain mount
options to the tmpfs virtual memory file system. A local attacker with the
ability to specify mount options could use this to cause a denial of service
(system crash). (CVE-2020-11565)
It was discovered that the OV51x USB Camera device driver in the Linux kernel
did not properly validate device metadata. A physically proximate attacker
could use this to cause a denial of service (system crash). (CVE-2020-11608)
It was discovered that the STV06XX USB Camera device driver in the Linux kernel
did not properly validate device metadata. A physically proximate attacker
could use this to cause a denial of service (system crash). (CVE-2020-11609)
It was discovered that the Xirlink C-It USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11668)
David Gibson discovered that the Linux kernel on Power9 CPUs did not properly
save and restore Authority Mask registers state in some situations. A local
attacker in a guest VM could use this to cause a denial of service (host system
crash). (CVE-2020-11669)
It was discovered that the block layer in the Linux kernel contained a race
condition leading to a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2020-12657)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
linux-image-5.0.0-1037-gke - 5.0.0-1037.38
linux-image-5.0.0-1052-oem-osp1 - 5.0.0-1052.57
linux-image-gke-5.0 - 5.0.0.1037.25
linux-image-oem-osp1 - 5.0.0.1052.55
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-2019-19769
o CVE-2020-11494
o CVE-2020-11565
o CVE-2020-11608
o CVE-2020-11609
o CVE-2020-11668
o CVE-2020-11669
o CVE-2020-12657
- -----------------------------------------------------------------------------
USN-4364-1: Linux kernel vulnerabilities
19 May 2020
linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
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 (V7) systems
o linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors
o linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel did
not properly deallocate memory in certain error conditions. A local attacker
could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19060)
It was discovered that the vhost net driver in the Linux kernel contained a
stack buffer overflow. A local attacker with the ability to perform ioctl()
calls on /dev/vhost-net could use this to cause a denial of service (system
crash). (CVE-2020-10942)
It was discovered that the Serial CAN interface driver in the Linux kernel did
not properly initialize data. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-11494)
It was discovered that the linux kernel did not properly validate certain mount
options to the tmpfs virtual memory file system. A local attacker with the
ability to specify mount options could use this to cause a denial of service
(system crash). (CVE-2020-11565)
It was discovered that the OV51x USB Camera device driver in the Linux kernel
did not properly validate device metadata. A physically proximate attacker
could use this to cause a denial of service (system crash). (CVE-2020-11608)
It was discovered that the STV06XX USB Camera device driver in the Linux kernel
did not properly validate device metadata. A physically proximate attacker
could use this to cause a denial of service (system crash). (CVE-2020-11609)
It was discovered that the Xirlink C-It USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11668)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
linux-image-4.4.0-1071-kvm - 4.4.0-1071.78
linux-image-4.4.0-1107-aws - 4.4.0-1107.118
linux-image-4.4.0-1133-raspi2 - 4.4.0-1133.142
linux-image-4.4.0-1137-snapdragon - 4.4.0-1137.145
linux-image-4.4.0-179-generic - 4.4.0-179.209
linux-image-4.4.0-179-generic-lpae - 4.4.0-179.209
linux-image-4.4.0-179-lowlatency - 4.4.0-179.209
linux-image-4.4.0-179-powerpc-e500mc - 4.4.0-179.209
linux-image-4.4.0-179-powerpc-smp - 4.4.0-179.209
linux-image-4.4.0-179-powerpc64-emb - 4.4.0-179.209
linux-image-4.4.0-179-powerpc64-smp - 4.4.0-179.209
linux-image-aws - 4.4.0.1107.111
linux-image-generic - 4.4.0.179.187
linux-image-generic-lpae - 4.4.0.179.187
linux-image-kvm - 4.4.0.1071.71
linux-image-lowlatency - 4.4.0.179.187
linux-image-powerpc-e500mc - 4.4.0.179.187
linux-image-powerpc-smp - 4.4.0.179.187
linux-image-powerpc64-emb - 4.4.0.179.187
linux-image-powerpc64-smp - 4.4.0.179.187
linux-image-raspi2 - 4.4.0.1133.133
linux-image-snapdragon - 4.4.0.1137.129
linux-image-virtual - 4.4.0.179.187
Ubuntu 14.04 ESM
linux-image-4.4.0-1067-aws - 4.4.0-1067.71
linux-image-4.4.0-179-generic - 4.4.0-179.209~14.04.1+signed1
linux-image-4.4.0-179-generic-lpae - 4.4.0-179.209~14.04.1
linux-image-4.4.0-179-lowlatency - 4.4.0-179.209~14.04.1+signed1
linux-image-4.4.0-179-powerpc-e500mc - 4.4.0-179.209~14.04.1
linux-image-4.4.0-179-powerpc-smp - 4.4.0-179.209~14.04.1
linux-image-4.4.0-179-powerpc64-emb - 4.4.0-179.209~14.04.1
linux-image-4.4.0-179-powerpc64-smp - 4.4.0-179.209~14.04.1
linux-image-aws - 4.4.0.1067.68
linux-image-generic-lpae-lts-xenial - 4.4.0.179.158
linux-image-generic-lts-xenial - 4.4.0.179.158
linux-image-lowlatency-lts-xenial - 4.4.0.179.158
linux-image-powerpc-e500mc-lts-xenial - 4.4.0.179.158
linux-image-powerpc-smp-lts-xenial - 4.4.0.179.158
linux-image-powerpc64-emb-lts-xenial - 4.4.0.179.158
linux-image-powerpc64-smp-lts-xenial - 4.4.0.179.158
linux-image-virtual-lts-xenial - 4.4.0.179.158
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-2019-19060
o CVE-2020-10942
o CVE-2020-11494
o CVE-2020-11565
o CVE-2020-11608
o CVE-2020-11609
o CVE-2020-11668
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