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#POODLE
15 Oct 2014

POODLE bites: exploiting the SSL 3.0 fallback

There are details of a vulnerability in the design of SSL version 3.0. This vulnerability allows the plaintext of secure connections to be calculated by a network attacker. 

SSL 3.0 is nearly 15 years old, but support for it remains widespread. Most importantly, nearly all browsers support it and, in order to work around bugs in HTTPS servers, browsers will retry failed connections with older protocol versions, including SSL 3.0. Because a network attacker can cause connection failures, they can trigger the use of SSL 3.0 and then exploit this issue. Disabling SSL 3.0 support, or CBC-mode ciphers with SSL 3.0, is sufficient to mitigate this issue, but presents significant compatibility problems, even today. 

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Tags:
POODLE SSL MITM information leaks
Source:
Google Blog
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Axarhöfði 14,
110 Reykjavik, Iceland

Iceland - 2015