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Hi, |
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On 04/11/2014 12:55 AM, walt wrote: |
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> Steve Gibson explained that the heartbeat feature was introduced in openssl to |
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> allow *UDP* connections to mimic the 'keepalive' function of the TCP protocol. |
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> |
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> IIRC Steve didn't explain how UDP bugs can compromise TCP connections. |
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> |
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> Anyone here really understand the underlying principles? If so, please explain! |
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yes, a TCP connection is stateful, so imho heartbeat is not necessary. |
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But you don't always speak "UDP" or "TCP". |
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Imagine some sort of direct connection without any type of |
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transportation layer. |
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As a generic cryptographic library, OpenSSL is designed to be adaptable |
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and universal. That broke OpenSSL's neck. |
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We only can hope, that the heartbeat exploit was not widely used before |
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they published that zero-day. |
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But we can be sure, that this is not going to be the last vulnerability |
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of this kind. |
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Regards |
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Ralf |
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