During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has ﬁnished. This could be exploited in a Denial Of Service attack.
Denial of Service
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If you think you’re a victim of a cyber-attack, immediately send an email to email@example.com for a quick response.