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.
2.1.4-5ubuntu1.12.2.7-1ubuntu0.11.5.2-3+deb8u3ubuntu1~esm81.6.4-3ubuntu0.2+esm61.6.4-4ubuntu0.2+esm62.0.7-2ubuntu0.1+esm52.1.4-5ubuntu1+esm5Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:NI:NA:LCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L