CVE-2002-20001

The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)at or D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE.

Affected products

Diffie-Hellman Key Agreement Protocol

Balasys Dheater

All versions

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

23.1% (98th percentile)

Weakness

CWE-400

NVD status

Analyzed

Published

2021-11-11