Ruby Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability - CVE-2014-4975
Off-by-one error in the encodes function in pack.c in Ruby 1.9.3 and earlier and 2.x through 2.1.2 when using certain format string specifiers allows context-dependent attackers to cause a denial of service (segmentation fault) via vectors that trigger a stack-based buffer overflow.