title: Client DoS due to large DH parameter
description: 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. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
problem types: Client side Denial of Service
affected:
{
product: OpenSSL
vendor: OpenSSL
versions:
status: affected, version: Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h)
status: affected, version: Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)
}
metrics:
other: [
content: {'lang': 'eng', 'url': 'https://www.openssl.org/policies/secpolicy.html#Low', 'value': 'Low'}
type: unknown
]