GHSA-xc85-32mf-xpv8 Rack arbitrary code execution via timing attack

• RubyGems rack: >= 1.5.0, < 1.5.2 → fixed in 1.5.2 • RubyGems rack: >= 1.4.0, < 1.4.5 → fixed in 1.4.5 • RubyGems rack: >= 1.3.0, < 1.3.10 → fixed in 1.3.10 • RubyGems rack: >= 1.2.0, < 1.2.8 → fixed in 1.2.8 • RubyGems rack: >= 1.1.0, < 1.1.6 → fixed in 1.1.6

Rack::Session::Cookie in Rack 1.5.x before 1.5.2, 1.4.x before 1.4.5, 1.3.x before 1.3.10, 1.2.x before 1.2.8, and 1.1.x before 1.1.6 allows remote attackers to guess the session cookie, gain privileges, and execute arbitrary code via a timing attack involving an HMAC comparison function that does not run in constant time.