Last updated 25 August 2025

DL::dlopen could open a library with tainted library name even if $SAFE > 0. This vulnerability affects Ruby versions 1.8, 1.9, 2.1, 2.2.

Upstream patch: https://github.com/ruby/ruby/commit/4600cf725a86ce31266153647ae5aa1197b1215b

Additional information and CVE assignment:

http://seclists.org/oss-sec/2015/q3/222

It was found that the decode method of the OpenSSL::ASN1 module was vulnerable to buffer underrun. An attacker could pass a specially crafted string to the application in order to crash the ruby interpreter, causing a denial of service.