Category Archives: Ubuntu

Ubuntu

USN-3337-1: Valgrind vulnerabilities

Ubuntu Security Notice USN-3337-1

21st June, 2017

valgrind vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Valgrind could be made to crash or run programs if it opened a specially
crafted file.

Software description

  • valgrind
    – instrumentation framework for building dynamic analysis tools

Details

It was discovered that Valgrind incorectly handled certain string
operations. If a user or automated system were tricked into processing a
specially crafted binary, a remote attacker could possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04
LTS and Ubuntu 16.10. (CVE-2016-2226)

It was discovered that Valgrind incorrectly handled parsing certain
binaries. If a user or automated system were tricked into processing a
specially crafted binary, a remote attacker could use this issue to cause
Valgrind to crash, resulting in a denial of service. (CVE-2016-4487,
CVE-2016-4488, CVE-2016-4489, CVE-2016-4490, CVE-2016-4491, CVE-2016-4492,
CVE-2016-4493, CVE-2016-6131)

Update instructions

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

Ubuntu 17.04:
valgrind

1:3.12.0-1ubuntu1.1
Ubuntu 16.10:
valgrind

1:3.12.0~svn20160714-1ubuntu2.1
Ubuntu 16.04 LTS:
valgrind

1:3.11.0-1ubuntu4.2
Ubuntu 14.04 LTS:
valgrind

1:3.10.1-1ubuntu3~14.5

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-2016-2226,

CVE-2016-4487,

CVE-2016-4488,

CVE-2016-4489,

CVE-2016-4490,

CVE-2016-4491,

CVE-2016-4492,

CVE-2016-4493,

CVE-2016-6131

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USN-3336-1: NSS vulnerability

Ubuntu Security Notice USN-3336-1

21st June, 2017

nss vulnerability

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

NSS could be made to crash if it received specially crafted network
traffic.

Software description

  • nss
    – Network Security Service library

Details

It was discovered that NSS incorrectly handled certain empty SSLv2
messages. A remote attacker could possibly use this issue to cause NSS to
crash, resulting in a denial of service.

Update instructions

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

Ubuntu 17.04:
libnss3

2:3.28.4-0ubuntu0.17.04.2
Ubuntu 16.10:
libnss3

2:3.28.4-0ubuntu0.16.10.2
Ubuntu 16.04 LTS:
libnss3

2:3.28.4-0ubuntu0.16.04.2
Ubuntu 14.04 LTS:
libnss3

2:3.28.4-0ubuntu0.14.04.2

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

After a standard system update you need to restart any applications
that use NSS, such as Evolution and Chromium, to make all the necessary
changes.

References

CVE-2017-7502

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USN-3335-2: Linux kernel (Trusty HWE) vulnerability

Ubuntu Security Notice USN-3335-2

21st June, 2017

linux-lts-trusty vulnerability

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

  • Ubuntu 12.04 LTS

Summary

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

Software description

  • linux-lts-trusty
    – Linux hardware enablement kernel from Trusty for Precise

Details

USN-3335-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-121-generic

3.13.0-121.170~precise1
linux-image-generic-lpae-lts-trusty

3.13.0.121.112
linux-image-generic-lts-trusty

3.13.0.121.112
linux-image-3.13.0-121-generic-lpae

3.13.0-121.170~precise1

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-2017-1000364

Read More

USN-3338-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3338-1

21st June, 2017

linux vulnerabilities

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

  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

Details

It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges (CVE-2017-1000364)

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling 32 bit
compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
unprivileged attacker could use this to cause a denial of service (system
crash) or execute arbitrary code with administrative privileges.
(CVE-2016-4997)

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-powerpc-smp

3.2.0.128.142
linux-image-3.2.0-128-virtual

3.2.0-128.173
linux-image-3.2.0-128-generic-pae

3.2.0-128.173
linux-image-generic

3.2.0.128.142
linux-image-generic-pae

3.2.0.128.142
linux-image-highbank

3.2.0.128.142
linux-image-3.2.0-128-highbank

3.2.0-128.173
linux-image-3.2.0-128-powerpc-smp

3.2.0-128.173
linux-image-virtual

3.2.0.128.142
linux-image-powerpc64-smp

3.2.0.128.142
linux-image-3.2.0-128-omap

3.2.0-128.173
linux-image-3.2.0-128-powerpc64-smp

3.2.0-128.173
linux-image-omap

3.2.0.128.142
linux-image-3.2.0-128-generic

3.2.0-128.173

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-2016-4997,

CVE-2017-1000364

Read More