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CVE-2002-20001 Detail

Current 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.


View Analysis Description

Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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References to Advisories, Solutions, and Tools

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

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Quick Info

CVE Dictionary Entry:
CVE-2002-20001
NVD Published Date:
11/11/2021
NVD Last Modified:
04/23/2024
Source:
MITRE