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Ubuntu Security Notice USN-4135-2
September 18, 2019
linux, linux-aws, linux-azure, linux-lts-trusty, linux-lts-xenial
vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM
Details:
Peter Pi discovered a buffer overflow in the virtio network backend
(vhost_net) implementation in the Linux kernel. An attacker in a guest may
be able to use this to cause a denial of service (host OS crash) or
possibly execute arbitrary code in the host OS. (CVE-2019-14835)
It was discovered that the Linux kernel on PowerPC architectures did not
properly handle Facility Unavailable exceptions in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15030)
It was discovered that the Linux kernel on PowerPC architectures did not
properly handle exceptions on interrupts in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15031)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 ESM:
linux-image-3.13.0-173-generic 3.13.0-173.224
linux-image-3.13.0-173-generic-lpae 3.13.0-173.224
linux-image-3.13.0-173-lowlatency 3.13.0-173.224
linux-image-3.13.0-173-powerpc-e500 3.13.0-173.224
linux-image-3.13.0-173-powerpc-e500mc 3.13.0-173.224
linux-image-3.13.0-173-powerpc-smp 3.13.0-173.224
linux-image-3.13.0-173-powerpc64-emb 3.13.0-173.224
linux-image-3.13.0-173-powerpc64-smp 3.13.0-173.224
linux-image-4.15.0-1059-azure 4.15.0-1059.64~14.04.1
linux-image-4.4.0-1054-aws 4.4.0-1054.58
linux-image-4.4.0-164-generic 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-generic-lpae 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-lowlatency 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc-e500mc 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc-smp 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc64-emb 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc64-smp 4.4.0-164.192~14.04.1
linux-image-aws 4.4.0.1054.55
linux-image-azure 4.15.0.1059.45
linux-image-generic 3.13.0.173.184
linux-image-generic-lpae 3.13.0.173.184
linux-image-generic-lpae-lts-xenial 4.4.0.164.143
linux-image-generic-lts-xenial 4.4.0.164.143
linux-image-lowlatency 3.13.0.173.184
linux-image-lowlatency-lts-xenial 4.4.0.164.143
linux-image-powerpc-e500 3.13.0.173.184
linux-image-powerpc-e500mc 3.13.0.173.184
linux-image-powerpc-e500mc-lts-xenial 4.4.0.164.143
linux-image-powerpc-smp 3.13.0.173.184
linux-image-powerpc-smp-lts-xenial 4.4.0.164.143
linux-image-powerpc64-emb 3.13.0.173.184
linux-image-powerpc64-emb-lts-xenial 4.4.0.164.143
linux-image-powerpc64-smp 3.13.0.173.184
linux-image-powerpc64-smp-lts-xenial 4.4.0.164.143
linux-image-server 3.13.0.173.184
linux-image-virtual 3.13.0.173.184
linux-image-virtual-lts-xenial 4.4.0.164.143
Ubuntu 12.04 ESM:
linux-image-3.13.0-173-generic 3.13.0-173.224~12.04.1
linux-image-3.13.0-173-generic-lpae 3.13.0-173.224~12.04.1
linux-image-3.13.0-173-lowlatency 3.13.0-173.224~12.04.1
linux-image-3.2.0-143-generic 3.2.0-143.190
linux-image-3.2.0-143-generic-pae 3.2.0-143.190
linux-image-3.2.0-143-highbank 3.2.0-143.190
linux-image-3.2.0-143-omap 3.2.0-143.190
linux-image-3.2.0-143-powerpc-smp 3.2.0-143.190
linux-image-3.2.0-143-powerpc64-smp 3.2.0-143.190
linux-image-3.2.0-143-virtual 3.2.0-143.190
linux-image-generic 3.2.0.143.158
linux-image-generic-lpae-lts-trusty 3.13.0.173.161
linux-image-generic-lts-trusty 3.13.0.173.161
linux-image-generic-pae 3.2.0.143.158
linux-image-highbank 3.2.0.143.158
linux-image-omap 3.2.0.143.158
linux-image-powerpc 3.2.0.143.158
linux-image-powerpc-smp 3.2.0.143.158
linux-image-powerpc64-smp 3.2.0.143.158
linux-image-server 3.2.0.143.158
linux-image-virtual 3.2.0.143.158
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:
https://usn.ubuntu.com/4135-2
https://usn.ubuntu.com/4135-1
CVE-2019-14835, CVE-2019-15030, CVE-2019-15031
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