The Fiddle::Handle implementation in ext/fiddle/handle.c in Ruby before 2.0.0-p648, 2.1 before 2.1.8, and 2.2 before 2.2.4, as distributed in Apple OS X before 10.11.4 and other products, mishandles tainting, which allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted string, related to the DL module and the libffi library. NOTE: this vulnerability exists because of a CVE-2009-5147 regression.

Affected: Ubuntu:14.04:LTS: ruby1.9.1, Ubuntu:14.04:LTS: ruby2.0, Ubuntu:16.04:LTS: ruby2.3

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)