USN-3685-1: Ruby vulnerabilities

13 June 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

Some of these CVE were already addressed in previous USN: 3439-1, 3553-1, 3528-1. Here we address for the remain releases.

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

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 was vulnerable to a DNS hijacking vulnerability. An attacker could use this to possibly force the RubyGems client to download and install gems from a server that the attacker controls. (CVE-2017-0902)

It was discovered that Ruby incorrectly handled certain YAML files. An attacker could use this to possibly execute arbitrary code. (CVE-2017-0903)

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

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 network requests. An attacker could possibly use this to inject a crafted key into a HTTP response. (CVE-2017-17742)

It was discovered that Ruby incorrectly handled certain files. An attacker could possibly use this to execute arbitrary code. This update is only addressed to ruby2.0. (CVE-2018-1000074)

It was discovered that Ruby incorrectly handled certain network requests. An attacker could possibly use this to cause a denial of service. (CVE-2018-8777)

Update instructions

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

Ubuntu 17.10
libruby2.3 - 2.3.3-1ubuntu1.6
ruby2.3 - 2.3.3-1ubuntu1.6
Ubuntu 16.04 LTS
libruby2.3 - 2.3.1-2~16.04.10
ruby2.3 - 2.3.1-2~16.04.10
Ubuntu 14.04 LTS
libruby1.9.1 - 1.9.3.484-2ubuntu1.12
libruby2.0 - 2.0.0.484-1ubuntu2.10
ruby1.9.1 - 1.9.3.484-2ubuntu1.12
ruby1.9.3 - 1.9.3.484-2ubuntu1.12
ruby2.0 - 2.0.0.484-1ubuntu2.10

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