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Ubuntu Security Notice USN-3528-1

Ubuntu Security Notice USN-3528-1
Posted Jan 11, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3528-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, ruby
systems | linux, ubuntu
advisories | CVE-2017-10784, CVE-2017-14033, CVE-2017-14064, CVE-2017-17790
MD5 | dc434c8e6d1bb07724a5d915b4e77117

Ubuntu Security Notice USN-3528-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3528-1
January 10, 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:
- ruby2.3: Interpreter of object-oriented scripting language Ruby
- ruby1.9.1: 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 versions:

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:
libruby1.9.1 1.9.3.484-2ubuntu1.7
ruby1.9.1 1.9.3.484-2ubuntu1.7
ruby1.9.3 1.9.3.484-2ubuntu1.7

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

References:
https://www.ubuntu.com/usn/usn-3528-1
CVE-2017-10784, CVE-2017-14033, CVE-2017-14064, CVE-2017-17790

Package Information:
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.3-1ubuntu1.2
https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~16.04.5
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.484-2ubuntu1.7
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