USN-3528-1: Ruby vulnerabilities

Ubuntu Security Notice USN-3528-1

10th January, 2018

ruby1.9.1, ruby2.3 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Ruby.

Software description

  • ruby1.9.1 - Interpreter of object-oriented scripting language Ruby
  • ruby2.3 - Interpreter of object-oriented scripting language Ruby

Details

It was discovered that Ruby incorrectly handled certain terminal emulator
escape sequences. An attacker could use this to execute arbitrary code via
a crafted user name. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-10784)

It was discovered that Ruby incorrectly handled certain strings.
An attacker could use this to cause a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-14033)

It was discovered that Ruby incorrectly handled some generating JSON.
An attacker could use this to possible expose sensitive information.
This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2017-14064)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could use this to execute arbitrary code.
(CVE-2017-17790)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 17.10:
libruby2.3 2.3.3-1ubuntu1.2
ruby2.3 2.3.3-1ubuntu1.2
Ubuntu 16.04 LTS:
libruby2.3 2.3.1-2~16.04.5
ruby2.3 2.3.1-2~16.04.5
Ubuntu 14.04 LTS:
ruby1.9.1 1.9.3.484-2ubuntu1.7
ruby1.9.3 1.9.3.484-2ubuntu1.7
libruby1.9.1 1.9.3.484-2ubuntu1.7

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

CVE-2017-10784, CVE-2017-14033, CVE-2017-14064, CVE-2017-17790