USN-3685-2: Ruby regression

Details

USN-3685-1 fixed a vulnerability in Ruby. The fix for CVE-2017-0903 introduced
a regression in Ruby. This update fixes the problem.

Original advisory 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 14.04

• libruby2.0 - 2.0.0.484-1ubuntu2.13+esm1
• ruby2.0 - 2.0.0.484-1ubuntu2.13+esm1

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

References

• CVE-2017-0903
• https://bugs.launchpad.net/ubuntu/+source/ruby2.0/+bug/1777174

Related notices

• USN-3553-1: libruby2.3, ruby2.3-tcltk, ruby2.3-doc, ruby2.3-dev, ruby2.3
• USN-3685-1: ruby2.0-tcltk, libruby2.0, libruby2.3, ruby1.9.1-full, ruby2.3-tcltk, ruby2.0, libruby1.9.1, ruby1.9.1-examples, ruby2.3-doc, ruby2.0-doc, ruby1.9.3, ruby1.9.1, ruby2.3-dev, libtcltk-ruby1.9.1, ruby1.9.1-dev, ruby2.3, ri1.9.1, ruby2.0-dev