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4 vulnerabilities by diffie-hellman_key_exchange_project
CVE-2024-41996 (GCVE-0-2024-41996)
Vulnerability from nvd – Published: 2024-08-26 00:00 – Updated: 2026-05-12 11:56
VLAI
EPSS
VEX
Summary
Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. 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 and validate the order of the public key.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-26 15:15 UTC
CWE
- n/a
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
19 products
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CVE-2022-40735 (GCVE-0-2022-40735)
Vulnerability from nvd – Published: 2022-11-14 00:00 – Updated: 2024-08-03 12:28
VLAI
EPSS
VEX
Summary
The 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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
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CVE-2024-41996 (GCVE-0-2024-41996)
Vulnerability from cvelistv5 – Published: 2024-08-26 00:00 – Updated: 2026-05-12 11:56
VLAI
EPSS
VEX
Summary
Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. 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 and validate the order of the public key.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-26 15:15 UTC
CWE
- n/a
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
19 products
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CVE-2022-40735 (GCVE-0-2022-40735)
Vulnerability from cvelistv5 – Published: 2022-11-14 00:00 – Updated: 2024-08-03 12:28
VLAI
EPSS
VEX
Summary
The 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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
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