USN-3553-1: Ruby vulnerabilities
Ubuntu Security Notice USN-3553-1
31st January, 2018
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
- Ubuntu 16.04 LTS
Several security issues were fixed in Ruby.
- ruby2.3 - Interpreter of object-oriented scripting language Ruby
It was discovered that Ruby failed to validate specification names.
An attacker could possibly use a maliciously crafted gem to potentially
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)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 17.10:
- libruby2.3 2.3.3-1ubuntu1.3
- ruby2.3 2.3.3-1ubuntu1.3
- Ubuntu 16.04 LTS:
- libruby2.3 2.3.1-2~16.04.6
- ruby2.3 2.3.1-2~16.04.6
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.