01 Record
CVE-2002-20001
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
UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 24.63% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 97.7% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-09-23.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-11-11 00:00Z4 YR AGO
- Last updated
- 2025-02-13 16:27Z1 YR AGO
- Reserved
- 2021-11-11
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-400Uncontrolled Resource ConsumptionClass
- Data version
- 5.1
- Document digest
- 60e7fac552e76d39357984d976aa1c030b2c53df30d8830b0d5748c3ee4b4c72
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/Balasys/dheater
- www.researchgate.nethttps://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol
- www.reddit.comhttps://www.reddit.com/r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/
- github.comhttps://github.com/mozilla/ssl-config-generator/issues/162
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-506569.pdf
- www.suse.comhttps://www.suse.com/support/kb/doc/?id=000020510
- www.openssl.orghttps://www.openssl.org/blog/blog/2022/10/21/tls-groups-configuration/
- www.arubanetworks.comhttps://www.arubanetworks.com/assets/alert/ARUBA-PSA-2022-004.txt
- support.f5.comhttps://support.f5.com/csp/article/K83120834
- dheatattack.comhttps://dheatattack.com
- gitlab.comhttps://gitlab.com/dheatattack/dheater
- dheatattack.gitlab.iohttps://dheatattack.gitlab.io/
- ieeexplore.ieee.orghttps://ieeexplore.ieee.org/document/10374117