Update to ruby/spec@6f38a82

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/spec/ruby/security/cve_2018_8778_spec.rb b/spec/ruby/security/cve_2018_8778_spec.rb
new file mode 100644
index 0000000000..a264a8581e
--- /dev/null
+++ b/spec/ruby/security/cve_2018_8778_spec.rb
@@ -0,0 +1,12 @@
+require_relative '../spec_helper'
+
+describe "String#unpack" do
+
+  it "resists CVE-2018-8778 by raising an exception when a position indicator is larger than a native integer" do
+    pos = (1 << PlatformGuard::POINTER_SIZE) - 99
+    lambda {
+      "0123456789".unpack("@#{pos}C10")
+    }.should raise_error(RangeError, /pack length too big/)
+  end
+
+end