Category Archives: Ubuntu

Ubuntu

USN-3310-1: lintian vulnerability

Ubuntu Security Notice USN-3310-1

6th June, 2017

lintian vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS

Summary

lintian could be made to run programs if it processed a specially crafted
package.

Software description

  • lintian
    – Debian package checker

Details

Jakub Wilk discovered that lintian incorrectly handled deserializing
certain YAML files. If a user or automated system were tricked into running
lintian on a specially crafted package, a remote attacker could possibly
use this issue to execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 17.04:
lintian

2.5.50.1ubuntu0.1
Ubuntu 16.10:
lintian

2.5.48ubuntu0.1
Ubuntu 16.04 LTS:
lintian

2.5.43ubuntu0.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2017-8829

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USN-3312-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3312-1

6th June, 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 16.04 LTS

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-gke
    – Linux kernel for Google Container Engine (GKE) systems

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

  • linux-snapdragon
    – Linux kernel for Snapdragon Processors

Details

It was discovered that the netfilter netlink implementation in the Linux
kernel did not properly validate batch messages. A local attacker with the
CAP_NET_ADMIN capability could use this to expose sensitive information or
cause a denial of service. (CVE-2016-7917)

Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build()
function in the Linux kernel. A local attacker could use to cause a denial
of service (system crash) or possibly execute arbitrary code with
administrative privileges. (CVE-2016-8632)

It was discovered that the keyring implementation in the Linux kernel in
some situations did not prevent special internal keyrings from being joined
by userspace keyrings. A privileged local attacker could use this to bypass
module verification. (CVE-2016-9604)

It was discovered that a buffer overflow existed in the trace subsystem in
the Linux kernel. A privileged local attacker could use this to execute
arbitrary code. (CVE-2017-0605)

Dmitry Vyukov discovered that KVM implementation in the Linux kernel
improperly emulated the VMXON instruction. A local attacker in a guest OS
could use this to cause a denial of service (memory consumption) in the
host OS. (CVE-2017-2596)

Daniel Jiang discovered that a race condition existed in the ipv4 ping
socket implementation in the Linux kernel. A local privileged attacker
could use this to cause a denial of service (system crash). (CVE-2017-2671)

Di Shen discovered that a race condition existed in the perf subsystem of
the Linux kernel. A local attacker could use this to cause a denial of
service or possibly gain administrative privileges. (CVE-2017-6001)

Eric Biggers discovered a memory leak in the keyring implementation in the
Linux kernel. A local attacker could use this to cause a denial of service
(memory consumption). (CVE-2017-7472)

Sabrina Dubroca discovered that the asynchronous cryptographic hash (ahash)
implementation in the Linux kernel did not properly handle a full request
queue. A local attacker could use this to cause a denial of service
(infinite recursion). (CVE-2017-7618)

Tuomas Haanpää and Ari Kauppi discovered that the NFSv2 and NFSv3 server
implementations in the Linux kernel did not properly handle certain long
RPC replies. A remote attacker could use this to cause a denial of service
(system crash). (CVE-2017-7645)

Tommi Rantala and Brad Spengler discovered that the memory manager in the
Linux kernel did not properly enforce the CONFIG_STRICT_DEVMEM protection
mechanism. A local attacker with access to /dev/mem could use this to
expose sensitive information or possibly execute arbitrary code.
(CVE-2017-7889)

Tuomas Haanpää and Ari Kauppi discovered that the NFSv2 and NFSv3 server
implementations in the Linux kernel did not properly check for the end of
buffer. A remote attacker could use this to craft requests that cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7895)

It was discovered that a use-after-free vulnerability existed in the device
driver for XCeive xc2028/xc3028 tuners in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-7913)

Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO
PCI driver for the Linux kernel. A local attacker with access to a vfio PCI
device file could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.04 LTS:
linux-image-4.4.0-79-generic

4.4.0-79.100
linux-image-4.4.0-1018-aws

4.4.0-1018.27
linux-image-powerpc-e500mc 4.4.0.79.85
linux-image-4.4.0-1014-gke

4.4.0-1014.14
linux-image-4.4.0-1057-raspi2

4.4.0-1057.64
linux-image-virtual 4.4.0.79.85
linux-image-snapdragon 4.4.0.1059.52
linux-image-powerpc64-emb 4.4.0.79.85
linux-image-gke 4.4.0.1014.16
linux-image-4.4.0-1059-snapdragon

4.4.0-1059.63
linux-image-generic 4.4.0.79.85
linux-image-4.4.0-79-powerpc-smp

4.4.0-79.100
linux-image-aws 4.4.0.1018.21
linux-image-4.4.0-79-powerpc64-smp

4.4.0-79.100
linux-image-raspi2 4.4.0.1057.58
linux-image-4.4.0-79-powerpc-e500mc

4.4.0-79.100
linux-image-powerpc-smp 4.4.0.79.85
linux-image-4.4.0-79-generic-lpae

4.4.0-79.100
linux-image-generic-lpae 4.4.0.79.85
linux-image-4.4.0-79-lowlatency

4.4.0-79.100
linux-image-powerpc64-smp 4.4.0.79.85
linux-image-lowlatency 4.4.0.79.85

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

CVE-2016-7913,

CVE-2016-7917,

CVE-2016-8632,

CVE-2016-9083,

CVE-2016-9084,

CVE-2016-9604,

CVE-2017-0605,

CVE-2017-2596,

CVE-2017-2671,

CVE-2017-6001,

CVE-2017-7472,

CVE-2017-7618,

CVE-2017-7645,

CVE-2017-7889,

CVE-2017-7895

Read More

USN-3313-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3313-1

6th June, 2017

linux, linux-raspi2 vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 16.10

Summary

The system could be made to run programs as an administrator.

Software description

  • linux
    – Linux kernel

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

Details

It was discovered that a buffer overflow existed in the trace subsystem in
the Linux kernel. A privileged local attacker could use this to execute
arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.10:
linux-image-4.8.0-54-generic

4.8.0-54.57
linux-image-powerpc-e500mc 4.8.0.54.66
linux-image-4.8.0-54-powerpc-smp

4.8.0-54.57
linux-image-4.8.0-54-powerpc-e500mc

4.8.0-54.57
linux-image-powerpc-smp 4.8.0.54.66
linux-image-generic 4.8.0.54.66
linux-image-4.8.0-54-generic-lpae

4.8.0-54.57
linux-image-lowlatency 4.8.0.54.66
linux-image-powerpc64-emb 4.8.0.54.66
linux-image-4.8.0-1038-raspi2

4.8.0-1038.41
linux-image-generic-lpae 4.8.0.54.66
linux-image-4.8.0-54-powerpc64-emb

4.8.0-54.57
linux-image-4.8.0-54-lowlatency

4.8.0-54.57
linux-image-raspi2 4.8.0.1038.42

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

CVE-2017-0605

Read More