Several security issues were fixed in 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)
31 January 2018
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in 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 versions:
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.
Vulmon