CVE-2002-20001

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Summary

CVECVE-2002-20001
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-11-11 19:15:07 UTC
Updated2026-09-23 13:10:00 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-400 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Balasys Dheater - All All All
Application F5 Big-ip Access Policy Manager All All All All
Hardware Siemens Scalance W1750d - All All All
Operating System Siemens Scalance W1750d Firmware All All All All
Operating System Suse Linux Enterprise Server 11 - All All
Operating System Suse Linux Enterprise Server 12 - All All
Operating System Suse Linux Enterprise Server 15 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Security Vulnerability: DHEater aka CVE-2002-20001 | Support | SUSE af854a3a-2127-422b-91ae-364da2661108 www.suse.com Third Party Advisory
Server overload by enforcing DHE key exchange using minimal bandwidth : netsec af854a3a-2127-422b-91ae-364da2661108 www.reddit.com Issue Tracking
ResearchGate af854a3a-2127-422b-91ae-364da2661108 www.researchgate.net Exploit, Technical Description
dheatattack.com af854a3a-2127-422b-91ae-364da2661108 dheatattack.com Third Party Advisory
ieeexplore.ieee.org/document/10374117 af854a3a-2127-422b-91ae-364da2661108 ieeexplore.ieee.org Technical Description, Third Party Advisory
GitHub - Balasys/dheater: D(HE)ater is a security tool can perform DoS attack by enforcing the DHE key exchange. af854a3a-2127-422b-91ae-364da2661108 github.com Product, Third Party Advisory
support.f5.com/csp/article/K83120834 af854a3a-2127-422b-91ae-364da2661108 support.f5.com Third Party Advisory
Stop recommending DHE, because of "dheater" vulnerability · Issue #162 · mozilla/ssl-config-generator · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Issue Tracking
Configuring Supported TLS Groups in OpenSSL - OpenSSL Blog af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Third Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Third Party Advisory
D(HE)at Attack / dheater · GitLab af854a3a-2127-422b-91ae-364da2661108 gitlab.com Third Party Advisory
D(HE)at Attack | D(HE)at Attack af854a3a-2127-422b-91ae-364da2661108 dheatattack.gitlab.io Third Party Advisory
www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt af854a3a-2127-422b-91ae-364da2661108 www.arubanetworks.com Technical Description, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 376752 F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) Diffie-Hellman key agreement protocol Vulnerability (K83120834)
  • 591188 Siemens SCALANCE W1750D Multiple Vulnerabilities (ICSA-22-314-10, SSA-506569)

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