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* lib/resolv.rb (Resolv::DNS::Message::MessageEncoder#put_labels):

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Prevent overflow of pointer to labels.
  Patch by Hannes Georg.  [ruby-core:71248] [Bug #11632]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52508 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2015-11-09 15:37:04 +00:00
parent a3e4d6a56e
commit 60055f8dfd
3 changed files with 26 additions and 1 deletions
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17
test/resolv/test_dns.rb
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@ -197,4 +197,21 @@ class TestResolvDNS < Test::Unit::TestCase
expected = (['0'] * 32 + ['ip6', 'arpa']).map {|label| Resolv::DNS::Label::Str.new(label) }
assert_equal(expected, labels)
end
def test_too_big_label_address
n = 2000
m = Resolv::DNS::Message::MessageEncoder.new {|msg|
2.times {
n.times {|i| msg.put_labels(["foo#{i}"]) }
}
}
Resolv::DNS::Message::MessageDecoder.new(m.to_s) {|msg|
2.times {
n.times {|i|
assert_equal(["foo#{i}"], msg.get_labels.map {|label| label.to_s })
}
}
}
assert_operator(2**14, :<, m.to_s.length)
end
end