USN-3621-2: Ruby regression

13 April 2018

ruby1.9.1, ruby2.0 regression

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

  • Ubuntu 14.04 LTS

Summary

USN-3621-1 caused a regression in Ruby.

Software Description

  • ruby1.9.1 - Object-oriented scripting language
  • ruby2.0 - Object-oriented scripting language

Details

USN-3621-1 fixed vulnerabilities in Ruby. The update caused an issue due to an incomplete patch for CVE-2018-1000074. This update reverts the problematic patch pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this to access sensitive information. (CVE-2018-1000073)

It was discovered that Ruby incorrectly handled certain files. An attacker could possibly use this to execute arbitrary code. (CVE-2018-1000074)

It was discovered that Ruby incorrectly handled certain files. An attacker could possibly use this to cause a denial of service. (CVE-2018-1000075)

It was discovered that Ruby incorrectly handled certain crypto signatures. An attacker could possibly use this to execute arbitrary code. (CVE-2018-1000076)

It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this to execute arbitrary code. (CVE-2018-1000077, CVE-2018-1000078, CVE-2018-1000079)

Update instructions

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

Ubuntu 14.04 LTS
libruby1.9.1 - 1.9.3.484-2ubuntu1.10
libruby2.0 - 2.0.0.484-1ubuntu2.8
ruby1.9.1 - 1.9.3.484-2ubuntu1.10
ruby1.9.3 - 1.9.3.484-2ubuntu1.10
ruby2.0 - 2.0.0.484-1ubuntu2.8

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