CVE-2022-40735

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Summary

CVECVE-2022-40735
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-11-14 23:15:00 UTC
Updated2024-01-11 03:15:00 UTC
DescriptionThe Diffie-Hellman Key Agreement Protocol allows use of long exponents that arguably make certain calculations unnecessarily expensive, because the 1996 van Oorschot and Wiener paper found that "(appropriately) short exponents" can be used when there are adequate subgroup constraints, and these short exponents can lead to less expensive calculations than for long exponents. This issue is different from CVE-2002-20001 because it is based on an observation about exponent size, rather than an observation about numbers that are not public keys. The specific situations in which calculation expense would constitute a server-side vulnerability depend on the protocol (e.g., TLS, SSH, or IKE) and the DHE implementation details. In general, there might be an availability concern because of server-side resource consumption from DHE modular-exponentiation calculations. Finally, it is possible for an attacker to exploit this vulnerability and CVE-2002-20001 together.

Risk And Classification

Problem Types: CWE-400

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Diffie-hellman Key Exchange Project Diffie-hellman Key Exchange - All All All

References

ReferenceSourceLinkTags
Just a moment... MISC www.researchgate.net
RFC 5114: Additional Diffie-Hellman Groups for Use with IETF Standards MISC www.rfc-editor.org
RFC 4419: Diffie-Hellman Group Exchange for the Secure Shell (SSH) Transport Layer Protocol MISC www.rfc-editor.org
link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf MISC link.springer.com
RFC 3526: More Modular Exponential (MODP) Diffie-Hellman groups for Internet Key Exchange (IKE) MISC www.rfc-editor.org
D(HE)at Attack | D(HE)at Attack dheatattack.gitlab.io
raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2... MISC raw.githubusercontent.com
nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf MISC nvlpubs.nist.gov
Diffie-Hellman short exponent references · GitHub MISC gist.github.com
Stop recommending DHE, because of "dheater" vulnerability · Issue #162 · mozilla/ssl-config-generator · GitHub MISC github.com
RFC 7919: Negotiated Finite Field Diffie-Hellman Ephemeral Parameters for Transport Layer Security (TLS) MISC www.rfc-editor.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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