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Ubuntu Security Notice USN-3621-2

Ubuntu Security Notice USN-3621-2
Posted Apr 13, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3621-2 - 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. It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this to access sensitive information. Various other issues were also addressed.

tags | advisory, vulnerability, ruby
systems | linux, ubuntu
advisories | CVE-2018-1000073, CVE-2018-1000074, CVE-2018-1000075, CVE-2018-1000076
MD5 | 57f2b3916aee211add479cb8a0f21e74

Ubuntu Security Notice USN-3621-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3621-2
April 13, 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

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

References:
https://usn.ubuntu.com/usn/usn-3621-2
https://usn.ubuntu.com/usn/usn-3621-1
CVE-2018-1000074

Package Information:
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.10
https://launchpad.net/ubuntu/+source/ruby2.0/2.0.0.484-1ubuntu2.8

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