USN-3553-1: Ruby vulnerabilities
Ubuntu Security Notice USN-3553-1
31st January, 2018
ruby2.3 vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.10
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Ruby.
Software description
- ruby2.3
– Interpreter of object-oriented scripting language Ruby
Details
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)
Update instructions
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.
References
Source: USN-3553-1: Ruby vulnerabilities
