NULL pointer dereference in Openssl

CVE-2017-3730

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…

EPSS: 0.592 (98.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2017-3730?
CVE-2017-3730 is a high-severity vulnerability in Openssl, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2017-05-04.
How severe is CVE-2017-3730?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2017-3730 known to be exploited?
9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.