CVE-2002-20001
CVSS v3
7.5
HIGH
EPSS Score
14.7 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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 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.
Technical details
- Published
- 2021-11-11
Frequently asked questions
What is 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 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.
Is CVE-2002-20001 actively exploited?
Active exploitation of CVE-2002-20001 has not been confirmed. The EPSS score is 14.7%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2002-20001?
CVE-2002-20001 has a CVSS v3 base score of 7.5 (HIGH severity).
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