CVE-2002-20001
At a glance
- Source
- NVD
- EPSS
- EPSS 24.64 % · percentile 98 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
References
- https://github.com/Balasys/dheater
- https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol
- https://www.reddit.com/r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/
- https://github.com/mozilla/ssl-config-generator/issues/162
- https://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf
- https://www.suse.com/support/kb/doc/?id=000020510
- 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://dheatattack.com
- https://gitlab.com/dheatattack/dheater
- https://dheatattack.gitlab.io/
- https://ieeexplore.ieee.org/document/10374117
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2002-1979
- GCVE · GCVE-0-2002-20001
CERT-FR advisories
- CERTFR-2025-AVI-0470 — Vulnérabilité dans les produits Moxa · cert.ssi.gouv.fr
- CERTFR-2022-AVI-862 — Multiples vulnérabilités dans Aruba Access Points · cert.ssi.gouv.fr
- CERTFR-2022-AVI-171 — Multiples vulnérabilités dans les commutateurs Aruba AOS-CX · cert.ssi.gouv.fr
- CERTFR-2022-AVI-1080 — Multiples vulnérabilités dans Aruba ClearPass Policy Manager · cert.ssi.gouv.fr
- CERTFR-2022-AVI-1001 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:balasys:dheater:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*≥ 13.1.0 < 16.1.4cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*≥ 17.0.0 < 17.1.0cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_advanced_firewall_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_analytics:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_application_acceleration_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_application_security_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_carrier-grade_nat:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_domain_name_system:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_edge_gateway:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_fraud_protection_service:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_global_traffic_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_link_controller:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_local_traffic_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_policy_enforcement_manager:17.5.0:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_service_proxy:1.6.0:*:*:*:*:kubernetes:*:*cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*≥ 13.1.0 ≤ 17.1.2cpe:2.3:a:f5:big-ip_ssl_orchestrator:17.5.0:*:*:*:*:*:*:*- +24 more
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |