Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such large responses could lead to a denial of service issue. Vulnerable applications will use the Rack::File middleware or the Rack::Utils.byte_ranges methods (this includes Rails applications). The vulnerability is fixed in 3.0.9.1 and 2.2.8.1.
{
"binaries": [
{
"binary_version": "1.5.2-3+deb8u3ubuntu1~esm8",
"binary_name": "librack-ruby"
},
{
"binary_version": "1.5.2-3+deb8u3ubuntu1~esm8",
"binary_name": "librack-ruby1.8"
},
{
"binary_version": "1.5.2-3+deb8u3ubuntu1~esm8",
"binary_name": "librack-ruby1.9.1"
},
{
"binary_version": "1.5.2-3+deb8u3ubuntu1~esm8",
"binary_name": "ruby-rack"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}