CVE-2002-20001in critical feed
The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not pu…
Published 4 y ago · modified 44 d ago · JSON
Summary
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.
Exploit prediction (EPSS)
24.64% probability of exploitation in the next 30 days, higher than 98% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
- CWE-400 Uncontrolled Resource Consumption
References
- github.com /Balasys/dheater · x_transferred
- researchgate.net /profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agr · x_transferred
- reddit.com /r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange/ · x_transferred
- github.com /mozilla/ssl-config-generator/issues/162 · x_transferred
- cert-portal.siemens.com /productcert/pdf/ssa-506569.pdf · x_transferred
- suse.com /support/kb/doc/?id=000020510 · x_transferred
- openssl.org /blog/blog/2022/10/21/tls-groups-configuration/ · x_transferred
- arubanetworks.com /assets/alert/ARUBA-PSA-2022-004.txt · x_transferred
- support.f5.com /csp/article/K83120834 · x_transferred
- dheatattack.com · x_transferred
- gitlab.com /dheatattack/dheater · x_transferred
- dheatattack.gitlab.io / · x_transferred
- ieeexplore.ieee.org /document/10374117 · x_transferred
Sources
- CVE List: CVE-2002-20001
- NVD: CVE-2002-20001
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.