Ruby is an interpreted object-oriented programming language. The elaborate standard library includes the "BigDecimal" class.
Tadayoshi Funaba reported that BigDecimal in ext/bigdecimal/bigdecimal.c does not properly handle string arguments containing overly long numbers.
A remote attacker could exploit this issue to remotely cause a Denial of Service attack.
There is no known workaround at this time.
All Ruby users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.6_p369"