The following updates has been released for Ubuntu Linux:

USN-3624-2: Patch vulnerabilities
USN-3625-1: Perl vulnerabilities
USN-3626-1: Ruby vulnerabilities

USN-3624-2: Patch vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3624-2
April 16, 2018

patch vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Patch.

Software Description:
- patch: Apply a diff file to an original

Details:

USN-3624-1 fixed a vulnerability in Patch. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Patch incorrectly handled certain files. An
 attacker could possibly use this to cause a denial of service. 
 (CVE-2016-10713)

 It was discovered that Patch incorrectly handled certain input
 validation. An attacker could possibly use this to execute arbitrary
 code. (CVE-2018-1000156)

Update instructions:

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

Ubuntu 12.04 ESM:
  patch 2.6.1-3ubuntu0.2

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

References:
  https://usn.ubuntu.com/usn/usn-3624-2
  https://usn.ubuntu.com/usn/usn-3624-1
  CVE-2016-10713, CVE-2018-1000156

USN-3625-1: Perl vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3625-1
April 16, 2018

perl vulnerabilities
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Perl.

Software Description:
- perl: Practical Extraction and Report Language

Details:

It was discovered that Perl incorrectly handled certain regular
expressions. An attacker could possibly use this issue to cause Perl to
hang, resulting in a denial of service. This issue only affected Ubuntu
14.04 LTS. (CVE-2015-8853)

It was discovered that Perl incorrectly loaded libraries from the current
working directory. A local attacker could possibly use this issue to
execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. (CVE-2016-6185)

It was discovered that Perl incorrectly handled the rmtree and remove_tree
functions. A local attacker could possibly use this issue to set the mode
on arbitrary files. This issue only affected Ubuntu 14.04 LTS and Ubuntu
16.04 LTS. (CVE-2017-6512)

Brian Carpenter discovered that Perl incorrectly handled certain regular
expressions. An attacker could use this issue to cause Perl to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2018-6797)

Nguyen Duc Manh discovered that Perl incorrectly handled certain regular
expressions. An attacker could use this issue to cause Perl to crash,
resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS
and Ubuntu 17.10. (CVE-2018-6798)

GwanYeong Kim discovered that Perl incorrectly handled certain data when
using the pack function. An attacker could use this issue to cause Perl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2018-6913)

Update instructions:

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

Ubuntu 17.10:
perl 5.26.0-8ubuntu1.1

Ubuntu 16.04 LTS:
perl 5.22.1-9ubuntu0.3

Ubuntu 14.04 LTS:
perl 5.18.2-2ubuntu1.4

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

References:
https://usn.ubuntu.com/usn/usn-3625-1
CVE-2015-8853, CVE-2016-6185, CVE-2017-6512, CVE-2018-6797,
CVE-2018-6798, CVE-2018-6913

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.26.0-8ubuntu1.1
https://launchpad.net/ubuntu/+source/perl/5.22.1-9ubuntu0.3
https://launchpad.net/ubuntu/+source/perl/5.18.2-2ubuntu1.4

USN-3626-1: Ruby vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3626-1
April 16, 2018

ruby1.9.1, ruby2.0, ruby2.3 vulnerabilities
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Ruby.

Software Description:
- ruby2.3: Object-oriented scripting language
- ruby1.9.1: Object-oriented scripting language
- ruby2.0: Object-oriented scripting language

Details:

It was discovered that Ruby incorrectly handled certain inputs. An
attacker could possibly use this to execute arbitrary code.
(CVE-2018-6914)

It was discovered that Ruby incorrectly handled certain inputs. An
attacker could possibly use this to access sensitive information.
(CVE-2018-8778, CVE-2018-8780)

It was discovered that Ruby incorrectly handled certain inputs. An
attacker could possibly use this to connect to an unintended socket.
(CVE-2018-8779)

Update instructions:

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

Ubuntu 17.10:
libruby2.3 2.3.3-1ubuntu1.5
ruby2.3 2.3.3-1ubuntu1.5

Ubuntu 16.04 LTS:
libruby2.3 2.3.1-2~16.04.9
ruby2.3 2.3.1-2~16.04.9

Ubuntu 14.04 LTS:
libruby1.9.1 1.9.3.484-2ubuntu1.11
libruby2.0 2.0.0.484-1ubuntu2.9
ruby1.9.1 1.9.3.484-2ubuntu1.11
ruby1.9.3 1.9.3.484-2ubuntu1.11
ruby2.0 2.0.0.484-1ubuntu2.9

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

References:
https://usn.ubuntu.com/usn/usn-3626-1
CVE-2018-6914, CVE-2018-8778, CVE-2018-8779, CVE-2018-8780

Package Information:
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.3-1ubuntu1.5
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.9
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.11
https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.9