67 lines
1.7 KiB
Ruby
67 lines
1.7 KiB
Ruby
require 'resolv'
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module Gitlab
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class UrlBlocker
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class << self
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# Used to specify what hosts and port numbers should be prohibited for project
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# imports.
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VALID_PORTS = [22, 80, 443].freeze
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def blocked_url?(url)
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return false if url.nil?
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blocked_ips = ["127.0.0.1", "::1", "0.0.0.0"]
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blocked_ips.concat(Socket.ip_address_list.map(&:ip_address))
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begin
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uri = Addressable::URI.parse(url)
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# Allow imports from the GitLab instance itself but only from the configured ports
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return false if internal?(uri)
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return true if blocked_port?(uri.port)
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return true if blocked_user_or_hostname?(uri.user)
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return true if blocked_user_or_hostname?(uri.hostname)
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server_ips = Resolv.getaddresses(uri.hostname)
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return true if (blocked_ips & server_ips).any?
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rescue Addressable::URI::InvalidURIError
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return true
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end
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false
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end
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private
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def blocked_port?(port)
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return false if port.blank?
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port < 1024 && !VALID_PORTS.include?(port)
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end
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def blocked_user_or_hostname?(value)
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return false if value.blank?
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value !~ /\A\p{Alnum}/
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end
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def internal?(uri)
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internal_web?(uri) || internal_shell?(uri)
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end
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def internal_web?(uri)
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uri.hostname == config.gitlab.host &&
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(uri.port.blank? || uri.port == config.gitlab.port)
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end
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def internal_shell?(uri)
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uri.hostname == config.gitlab_shell.ssh_host &&
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(uri.port.blank? || uri.port == config.gitlab_shell.ssh_port)
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end
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def config
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Gitlab.config
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end
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end
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end
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end
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