CVE-2017-3730
HighPublished
Bad (EC)DHE parameters cause a client crash
- Published
- May 4, 2017
- Updated
- Sep 16, 2024
- Assigning CNA
- openssl
- Evidence observed
- Jan 26, 2017
Primary CVSS
7.5/ 10High
nvd · CVSS 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H49.9%
Moderate · next 30 days
- Percentile
- 98.9%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack.
Sources
2OpenSSL CVE-2017-3730 proof-of-concept
Guido Vranken · multiple · Jan 26, 2017
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