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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2002-20001 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf CVE, MITRE Third Party Advisory 
https://dheatattack.com CVE, MITRE Third Party Advisory 
https://dheatattack.gitlab.io/ CVE, MITRE Third Party Advisory 
https://github.com/Balasys/dheater CVE, MITRE Product  Third Party Advisory 
https://github.com/mozilla/ssl-config-generator/issues/162 CVE, MITRE Issue Tracking 
https://gitlab.com/dheatattack/dheater CVE, MITRE Third Party Advisory 
https://ieeexplore.ieee.org/document/10374117 CVE, MITRE Technical Description  Third Party Advisory 
https://support.f5.com/csp/article/K83120834 CVE, MITRE Third Party Advisory 
https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt CVE, MITRE Technical Description  Third Party Advisory 
https://www.openssl.org/blog/blog/2022/10/21/tls-groups-configuration/ CVE, MITRE Third Party Advisory 
https://www.reddit.com/r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/ CVE, MITRE Issue Tracking 
https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol CVE, MITRE Exploit  Technical Description 
https://www.suse.com/support/kb/doc/?id=000020510 CVE, MITRE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption cwe source acceptance level NIST  

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Change History

19 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2002-20001
NVD Published Date:
11/11/2021
NVD Last Modified:
08/22/2025
Source:
MITRE