USN-3365-1: Ruby vulnerabilities

Releases

• Ubuntu 17.04
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• ruby1.9.1 - Object-oriented scripting language
• ruby2.0 - Object-oriented scripting language
• ruby2.3 - Object-oriented scripting language

Details

It was discovered that Ruby DL::dlopen incorrectly handled opening
libraries. An attacker could possibly use this issue to open libraries with
tainted names. This issue only applied to Ubuntu 14.04 LTS. (CVE-2009-5147)

Tony Arcieri, Jeffrey Walton, and Steffan Ullrich discovered that the Ruby
OpenSSL extension incorrectly handled hostname wildcard matching. This
issue only applied to Ubuntu 14.04 LTS. (CVE-2015-1855)

Christian Hofstaedtler discovered that Ruby Fiddle::Handle incorrectly
handled certain crafted strings. An attacker could use this issue to cause
a denial of service, or possibly execute arbitrary code. This issue only
applied to Ubuntu 14.04 LTS. (CVE-2015-7551)

It was discovered that Ruby Net::SMTP incorrectly handled CRLF sequences. A
remote attacker could possibly use this issue to inject SMTP commands.
(CVE-2015-9096)

Marcin Noga discovered that Ruby incorrectly handled certain arguments in
a TclTkIp class method. An attacker could possibly use this issue to
execute arbitrary code. This issue only affected Ubuntu 14.04 LTS.
(CVE-2016-2337)

It was discovered that Ruby Fiddle::Function.new incorrectly handled
certain arguments. An attacker could possibly use this issue to execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2016-2339)

It was discovered that Ruby incorrectly handled the initialization vector
(IV) in GCM mode. An attacker could possibly use this issue to bypass
encryption. (CVE-2016-7798)

Update instructions

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

Ubuntu 17.04

• libruby2.3 - 2.3.3-1ubuntu0.1
• ruby2.3 - 2.3.3-1ubuntu0.1

Ubuntu 16.04

• libruby2.3 - 2.3.1-2~16.04.2
• ruby2.3 - 2.3.1-2~16.04.2

Ubuntu 14.04

• libruby1.9.1 - 1.9.3.484-2ubuntu1.3
• libruby2.0 - 2.0.0.484-1ubuntu2.4
• ruby1.9.1 - 1.9.3.484-2ubuntu1.3
• ruby2.0 - 2.0.0.484-1ubuntu2.4

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

References

• CVE-2009-5147
• CVE-2015-1855
• CVE-2015-7551
• CVE-2015-9096
• CVE-2016-2337
• CVE-2016-2339
• CVE-2016-7798