USN-3439-1: Ruby vulnerabilities

Ubuntu Security Notice USN-3439-1

5th October, 2017

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

Several security issues were fixed in Ruby.

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to cause a buffer overrun.
(CVE-2017-0898)

Yusuke Endoh discovered that Ruby incorrectly handled certain files.
An attacker could use this to execute terminal escape sequences.
(CVE-2017-0899)

Yusuke Endoh discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to cause a denial of service.
(CVE-2017-0900)

It was discovered that Ruby incorrectly handled certain files.
An attacker could use this to overwrite any file on the filesystem.
(CVE-2017-0901)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to execute arbitrary code.
(CVE-2017-10784)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to cause a denial of service.
(CVE-2017-14033)

It was discovered that Ruby incorrectly handled certain files.
An attacker could use this to expose sensitive information.
(CVE-2017-14064)

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

Ubuntu 14.04 LTS:: ruby1.9.1

1.9.3.484-2ubuntu1.5; libruby1.9.1

1.9.3.484-2ubuntu1.5; ruby1.9.3

1.9.3.484-2ubuntu1.5

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.