Detections
Analytics
CVE-2002-20001
high
Description
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.
References
https://www.suse.com/support/kb/doc/?id=000020510
https://www.reddit.com/r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/
https://www.openssl.org/blog/blog/2022/10/21/tls-groups-configuration/
https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt
https://support.f5.com/csp/article/K83120834
https://ieeexplore.ieee.org/document/10374117
https://gitlab.com/dheatattack/dheater
https://github.com/mozilla/ssl-config-generator/issues/162
https://github.com/Balasys/dheater
https://dheatattack.gitlab.io/
https://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf