debian-mirror-gitlab/spec/lib/gitlab/url_blocker_spec.rb
2019-10-31 01:37:42 +05:30

625 lines
24 KiB
Ruby
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# coding: utf-8
require 'spec_helper'
describe Gitlab::UrlBlocker do
include StubRequests
describe '#validate!' do
shared_examples 'validates URI and hostname' do
it 'runs the url validations' do
uri, hostname = subject
expect(uri).to eq(Addressable::URI.parse(expected_uri))
expect(hostname).to eq(expected_hostname)
end
end
context 'when URI is nil' do
let(:import_url) { nil }
it 'returns no URI and hostname' do
uri, hostname = described_class.validate!(import_url)
expect(uri).to be(nil)
expect(hostname).to be(nil)
end
end
context 'when URI is internal' do
let(:import_url) { 'http://localhost' }
it 'returns URI and no hostname' do
uri, hostname = described_class.validate!(import_url)
expect(uri).to eq(Addressable::URI.parse('http://[::1]'))
expect(hostname).to eq('localhost')
end
end
context 'when the URL hostname is a domain' do
let(:import_url) { 'https://example.org' }
it 'returns URI and hostname' do
uri, hostname = described_class.validate!(import_url)
expect(uri).to eq(Addressable::URI.parse('https://93.184.216.34'))
expect(hostname).to eq('example.org')
end
context 'when scheme is missing' do
let(:import_url) { '//example.org/path' }
it 'raises and error' do
expect { described_class.validate!(import_url) }.to raise_error(described_class::BlockedUrlError)
end
end
end
context 'when the URL hostname is an IP address' do
let(:import_url) { 'https://93.184.216.34' }
it 'returns URI and no hostname' do
uri, hostname = described_class.validate!(import_url)
expect(uri).to eq(Addressable::URI.parse('https://93.184.216.34'))
expect(hostname).to be(nil)
end
end
context 'disabled require_absolute' do
subject { described_class.validate!(import_url, require_absolute: false) }
context 'with scheme and hostname' do
let(:import_url) { 'https://example.org/path' }
before do
stub_dns(import_url, ip_address: '93.184.216.34')
end
it_behaves_like 'validates URI and hostname' do
let(:expected_uri) { 'https://93.184.216.34/path' }
let(:expected_hostname) { 'example.org' }
end
end
context 'without scheme' do
let(:import_url) { '//93.184.216.34/path' }
it_behaves_like 'validates URI and hostname' do
let(:expected_uri) { import_url }
let(:expected_hostname) { nil }
end
end
end
context 'disabled DNS rebinding protection' do
context 'when URI is internal' do
let(:import_url) { 'http://localhost' }
it 'returns URI and no hostname' do
uri, hostname = described_class.validate!(import_url, dns_rebind_protection: false)
expect(uri).to eq(Addressable::URI.parse('http://localhost'))
expect(hostname).to be(nil)
end
end
context 'when the URL hostname is a domain' do
let(:import_url) { 'https://example.org' }
it 'returns URI and no hostname' do
uri, hostname = described_class.validate!(import_url, dns_rebind_protection: false)
expect(uri).to eq(Addressable::URI.parse('https://example.org'))
expect(hostname).to eq(nil)
end
context 'when it cannot be resolved' do
let(:import_url) { 'http://foobar.x' }
it 'raises error' do
stub_env('RSPEC_ALLOW_INVALID_URLS', 'false')
expect { described_class.validate!(import_url) }.to raise_error(described_class::BlockedUrlError)
end
end
end
context 'when the URL hostname is an IP address' do
let(:import_url) { 'https://93.184.216.34' }
it 'returns URI and no hostname' do
uri, hostname = described_class.validate!(import_url, dns_rebind_protection: false)
expect(uri).to eq(Addressable::URI.parse('https://93.184.216.34'))
expect(hostname).to be(nil)
end
context 'when it is invalid' do
let(:import_url) { 'http://1.1.1.1.1' }
it 'raises an error' do
stub_env('RSPEC_ALLOW_INVALID_URLS', 'false')
expect { described_class.validate!(import_url) }.to raise_error(described_class::BlockedUrlError)
end
end
end
end
end
describe '#blocked_url?' do
let(:ports) { Project::VALID_IMPORT_PORTS }
it 'allows imports from configured web host and port' do
import_url = "http://#{Gitlab.config.gitlab.host}:#{Gitlab.config.gitlab.port}/t.git"
expect(described_class.blocked_url?(import_url)).to be false
end
it 'allows mirroring from configured SSH host and port' do
import_url = "ssh://#{Gitlab.config.gitlab_shell.ssh_host}:#{Gitlab.config.gitlab_shell.ssh_port}/t.git"
expect(described_class.blocked_url?(import_url)).to be false
end
it 'returns true for bad localhost hostname' do
expect(described_class.blocked_url?('https://localhost:65535/foo/foo.git')).to be true
end
it 'returns true for bad port' do
expect(described_class.blocked_url?('https://gitlab.com:25/foo/foo.git', ports: ports)).to be true
end
it 'returns true for bad scheme' do
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.git', schemes: ['https'])).to be false
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.git')).to be false
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.git', schemes: ['http'])).to be true
end
it 'returns true for bad protocol on configured web/SSH host and ports' do
web_url = "javascript://#{Gitlab.config.gitlab.host}:#{Gitlab.config.gitlab.port}/t.git%0aalert(1)"
expect(described_class.blocked_url?(web_url)).to be true
ssh_url = "javascript://#{Gitlab.config.gitlab_shell.ssh_host}:#{Gitlab.config.gitlab_shell.ssh_port}/t.git%0aalert(1)"
expect(described_class.blocked_url?(ssh_url)).to be true
end
it 'returns true for localhost IPs' do
expect(described_class.blocked_url?('https://[0:0:0:0:0:0:0:0]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://0.0.0.0/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::]/foo/foo.git')).to be true
end
it 'returns true for loopback IP' do
expect(described_class.blocked_url?('https://127.0.0.2/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://127.0.0.1/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::1]/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (0177.1)' do
expect(described_class.blocked_url?('https://0177.1:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (017700000001)' do
expect(described_class.blocked_url?('https://017700000001:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (0x7f.1)' do
expect(described_class.blocked_url?('https://0x7f.1:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (0x7f.0.0.1)' do
expect(described_class.blocked_url?('https://0x7f.0.0.1:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (0x7f000001)' do
expect(described_class.blocked_url?('https://0x7f000001:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (2130706433)' do
expect(described_class.blocked_url?('https://2130706433:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (127.000.000.001)' do
expect(described_class.blocked_url?('https://127.000.000.001:65535/foo/foo.git')).to be true
end
it 'returns true for alternative version of 127.0.0.1 (127.0.1)' do
expect(described_class.blocked_url?('https://127.0.1:65535/foo/foo.git')).to be true
end
context 'with ipv6 mapped address' do
it 'returns true for localhost IPs' do
expect(described_class.blocked_url?('https://[0:0:0:0:0:ffff:0.0.0.0]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:0.0.0.0]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:0:0]/foo/foo.git')).to be true
end
it 'returns true for loopback IPs' do
expect(described_class.blocked_url?('https://[0:0:0:0:0:ffff:127.0.0.1]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:127.0.0.1]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:7f00:1]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[0:0:0:0:0:ffff:127.0.0.2]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:127.0.0.2]/foo/foo.git')).to be true
expect(described_class.blocked_url?('https://[::ffff:7f00:2]/foo/foo.git')).to be true
end
end
it 'returns true for a non-alphanumeric hostname' do
aggregate_failures do
expect(described_class).to be_blocked_url('ssh://-oProxyCommand=whoami/a')
# The leading character here is a Unicode "soft hyphen"
expect(described_class).to be_blocked_url('ssh://­oProxyCommand=whoami/a')
# Unicode alphanumerics are allowed
expect(described_class).not_to be_blocked_url('ssh://ğitlab.com/a')
end
end
it 'returns true for invalid URL' do
expect(described_class.blocked_url?('http://:8080')).to be true
end
it 'returns false for legitimate URL' do
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.git')).to be false
end
context 'when allow_local_network is' do
let(:local_ips) do
[
'192.168.1.2',
'[0:0:0:0:0:ffff:192.168.1.2]',
'[::ffff:c0a8:102]',
'10.0.0.2',
'[0:0:0:0:0:ffff:10.0.0.2]',
'[::ffff:a00:2]',
'172.16.0.2',
'[0:0:0:0:0:ffff:172.16.0.2]',
'[::ffff:ac10:20]',
'[feef::1]',
'[fee2::]',
'[fc00:bf8b:e62c:abcd:abcd:aaaa:aaaa:aaaa]'
]
end
let(:fake_domain) { 'www.fakedomain.fake' }
shared_examples 'allows local requests' do |url_blocker_attributes|
it 'does not block urls from private networks' do
local_ips.each do |ip|
stub_domain_resolv(fake_domain, ip) do
expect(described_class).not_to be_blocked_url("http://#{fake_domain}", url_blocker_attributes)
end
expect(described_class).not_to be_blocked_url("http://#{ip}", url_blocker_attributes)
end
end
it 'allows localhost endpoints' do
expect(described_class).not_to be_blocked_url('http://0.0.0.0', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://localhost', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://127.0.0.1', url_blocker_attributes)
end
it 'allows loopback endpoints' do
expect(described_class).not_to be_blocked_url('http://127.0.0.2', url_blocker_attributes)
end
it 'allows IPv4 link-local endpoints' do
expect(described_class).not_to be_blocked_url('http://169.254.169.254', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://169.254.168.100', url_blocker_attributes)
end
it 'allows IPv6 link-local endpoints' do
expect(described_class).not_to be_blocked_url('http://[0:0:0:0:0:ffff:169.254.169.254]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[::ffff:169.254.169.254]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[::ffff:a9fe:a9fe]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[0:0:0:0:0:ffff:169.254.168.100]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[::ffff:169.254.168.100]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[::ffff:a9fe:a864]', url_blocker_attributes)
expect(described_class).not_to be_blocked_url('http://[fe80::c800:eff:fe74:8]', url_blocker_attributes)
end
end
context 'true (default)' do
it_behaves_like 'allows local requests', { allow_localhost: true, allow_local_network: true }
end
context 'false' do
it 'blocks urls from private networks' do
local_ips.each do |ip|
stub_domain_resolv(fake_domain, ip) do
expect(described_class).to be_blocked_url("http://#{fake_domain}", allow_local_network: false)
end
expect(described_class).to be_blocked_url("http://#{ip}", allow_local_network: false)
end
end
it 'blocks IPv4 link-local endpoints' do
expect(described_class).to be_blocked_url('http://169.254.169.254', allow_local_network: false)
expect(described_class).to be_blocked_url('http://169.254.168.100', allow_local_network: false)
end
it 'blocks IPv6 link-local endpoints' do
expect(described_class).to be_blocked_url('http://[0:0:0:0:0:ffff:169.254.169.254]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[::ffff:169.254.169.254]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[::ffff:a9fe:a9fe]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[0:0:0:0:0:ffff:169.254.168.100]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[::ffff:169.254.168.100]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[::ffff:a9fe:a864]', allow_local_network: false)
expect(described_class).to be_blocked_url('http://[fe80::c800:eff:fe74:8]', allow_local_network: false)
end
context 'when local domain/IP is whitelisted' do
let(:url_blocker_attributes) do
{
allow_localhost: false,
allow_local_network: false
}
end
before do
stub_application_setting(outbound_local_requests_whitelist: whitelist)
end
context 'with IPs in whitelist' do
let(:whitelist) do
[
'0.0.0.0',
'127.0.0.1',
'127.0.0.2',
'192.168.1.1',
'192.168.1.2',
'0:0:0:0:0:ffff:192.168.1.2',
'::ffff:c0a8:102',
'10.0.0.2',
'0:0:0:0:0:ffff:10.0.0.2',
'::ffff:a00:2',
'172.16.0.2',
'0:0:0:0:0:ffff:172.16.0.2',
'::ffff:ac10:20',
'feef::1',
'fee2::',
'fc00:bf8b:e62c:abcd:abcd:aaaa:aaaa:aaaa',
'0:0:0:0:0:ffff:169.254.169.254',
'::ffff:a9fe:a9fe',
'::ffff:169.254.168.100',
'::ffff:a9fe:a864',
'fe80::c800:eff:fe74:8',
# garbage IPs
'45645632345',
'garbage456:more345gar:bage'
]
end
it_behaves_like 'allows local requests', { allow_localhost: false, allow_local_network: false }
it 'whitelists IP when dns_rebind_protection is disabled' do
stub_domain_resolv('example.com', '192.168.1.1') do
expect(described_class).not_to be_blocked_url("http://example.com",
url_blocker_attributes.merge(dns_rebind_protection: false))
end
end
end
context 'with domains in whitelist' do
let(:whitelist) do
[
'www.example.com',
'example.com',
'xn--itlab-j1a.com',
'garbage$^$%#$^&$'
]
end
it 'allows domains present in whitelist' do
domain = 'example.com'
subdomain1 = 'www.example.com'
subdomain2 = 'subdomain.example.com'
stub_domain_resolv(domain, '192.168.1.1') do
expect(described_class).not_to be_blocked_url("http://#{domain}",
url_blocker_attributes)
end
stub_domain_resolv(subdomain1, '192.168.1.1') do
expect(described_class).not_to be_blocked_url("http://#{subdomain1}",
url_blocker_attributes)
end
# subdomain2 is not part of the whitelist so it should be blocked
stub_domain_resolv(subdomain2, '192.168.1.1') do
expect(described_class).to be_blocked_url("http://#{subdomain2}",
url_blocker_attributes)
end
end
it 'works with unicode and idna encoded domains' do
unicode_domain = 'ğitlab.com'
idna_encoded_domain = 'xn--itlab-j1a.com'
stub_domain_resolv(unicode_domain, '192.168.1.1') do
expect(described_class).not_to be_blocked_url("http://#{unicode_domain}",
url_blocker_attributes)
end
stub_domain_resolv(idna_encoded_domain, '192.168.1.1') do
expect(described_class).not_to be_blocked_url("http://#{idna_encoded_domain}",
url_blocker_attributes)
end
end
end
context 'with ip ranges in whitelist' do
let(:ipv4_range) { '127.0.0.0/28' }
let(:ipv6_range) { 'fd84:6d02:f6d8:c89e::/124' }
let(:whitelist) do
[
ipv4_range,
ipv6_range
]
end
it 'blocks ipv4 range when not in whitelist' do
stub_application_setting(outbound_local_requests_whitelist: [])
IPAddr.new(ipv4_range).to_range.to_a.each do |ip|
expect(described_class).to be_blocked_url("http://#{ip}",
url_blocker_attributes)
end
end
it 'allows all ipv4s in the range when in whitelist' do
IPAddr.new(ipv4_range).to_range.to_a.each do |ip|
expect(described_class).not_to be_blocked_url("http://#{ip}",
url_blocker_attributes)
end
end
it 'blocks ipv6 range when not in whitelist' do
stub_application_setting(outbound_local_requests_whitelist: [])
IPAddr.new(ipv6_range).to_range.to_a.each do |ip|
expect(described_class).to be_blocked_url("http://[#{ip}]",
url_blocker_attributes)
end
end
it 'allows all ipv6s in the range when in whitelist' do
IPAddr.new(ipv6_range).to_range.to_a.each do |ip|
expect(described_class).not_to be_blocked_url("http://[#{ip}]",
url_blocker_attributes)
end
end
it 'blocks IPs outside the range' do
expect(described_class).to be_blocked_url("http://[fd84:6d02:f6d8:c89e:0:0:1:f]",
url_blocker_attributes)
expect(described_class).to be_blocked_url("http://127.0.1.15",
url_blocker_attributes)
end
end
end
end
def stub_domain_resolv(domain, ip, &block)
address = double(ip_address: ip, ipv4_private?: true, ipv6_link_local?: false, ipv4_loopback?: false, ipv6_loopback?: false, ipv4?: false)
allow(Addrinfo).to receive(:getaddrinfo).with(domain, any_args).and_return([address])
allow(address).to receive(:ipv6_v4mapped?).and_return(false)
yield
allow(Addrinfo).to receive(:getaddrinfo).and_call_original
end
end
context 'when enforce_user is' do
context 'false (default)' do
it 'does not block urls with a non-alphanumeric username' do
expect(described_class).not_to be_blocked_url('ssh://-oProxyCommand=whoami@example.com/a')
# The leading character here is a Unicode "soft hyphen"
expect(described_class).not_to be_blocked_url('ssh://­oProxyCommand=whoami@example.com/a')
# Unicode alphanumerics are allowed
expect(described_class).not_to be_blocked_url('ssh://ğitlab@example.com/a')
end
end
context 'true' do
it 'blocks urls with a non-alphanumeric username' do
aggregate_failures do
expect(described_class).to be_blocked_url('ssh://-oProxyCommand=whoami@example.com/a', enforce_user: true)
# The leading character here is a Unicode "soft hyphen"
expect(described_class).to be_blocked_url('ssh://­oProxyCommand=whoami@example.com/a', enforce_user: true)
# Unicode alphanumerics are allowed
expect(described_class).not_to be_blocked_url('ssh://ğitlab@example.com/a', enforce_user: true)
end
end
end
end
context 'when ascii_only is true' do
it 'returns true for unicode domain' do
expect(described_class.blocked_url?('https://𝕘itαƄ.com/foo/foo.bar', ascii_only: true)).to be true
end
it 'returns true for unicode tld' do
expect(described_class.blocked_url?('https://gitlab.ο/foo/foo.bar', ascii_only: true)).to be true
end
it 'returns true for unicode path' do
expect(described_class.blocked_url?('https://gitlab.com/𝒇οο/𝒇οο.Ƅα', ascii_only: true)).to be true
end
it 'returns true for IDNA deviations' do
expect(described_class.blocked_url?('https://mißile.com/foo/foo.bar', ascii_only: true)).to be true
expect(described_class.blocked_url?('https://miςςile.com/foo/foo.bar', ascii_only: true)).to be true
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.bar', ascii_only: true)).to be true
expect(described_class.blocked_url?('https://gitlab.com/foo/foo.bar', ascii_only: true)).to be true
end
end
context 'when require_absolute is false' do
it 'allows paths' do
expect(described_class.blocked_url?('/foo/foo.bar', require_absolute: false)).to be false
end
it 'allows absolute urls without paths' do
expect(described_class.blocked_url?('http://example.com', require_absolute: false)).to be false
end
it 'paths must begin with a slash' do
expect(described_class.blocked_url?('foo/foo.bar', require_absolute: false)).to be true
expect(described_class.blocked_url?('', require_absolute: false)).to be true
end
end
it 'blocks urls with invalid ip address' do
stub_env('RSPEC_ALLOW_INVALID_URLS', 'false')
expect(described_class).to be_blocked_url('http://8.8.8.8.8')
end
it 'blocks urls whose hostname cannot be resolved' do
stub_env('RSPEC_ALLOW_INVALID_URLS', 'false')
expect(described_class).to be_blocked_url('http://foobar.x')
end
end
describe '#validate_hostname' do
let(:ip_addresses) do
[
'2001:db8:1f70::999:de8:7648:6e8',
'FE80::C800:EFF:FE74:8',
'::ffff:127.0.0.1',
'::ffff:169.254.168.100',
'::ffff:7f00:1',
'0:0:0:0:0:ffff:0.0.0.0',
'localhost',
'127.0.0.1',
'127.000.000.001',
'0x7f000001',
'0x7f.0.0.1',
'0x7f.0.0.1',
'017700000001',
'0177.1',
'2130706433',
'::',
'::1'
]
end
it 'does not raise error for valid Ip addresses' do
ip_addresses.each do |ip|
expect { described_class.send(:validate_hostname, ip) }.not_to raise_error
end
end
end
end