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CVE PROGRAM SOURCE RECORDUnscored

CVE-2018-0732

Client DoS due to large DH parameter

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Status
Published
Published
Updated
Assigning organization
openssl

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).

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

OpenSSL OpenSSL

  • Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h)affected
  • Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)affected

References