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Fencer Vulns
high 7.5

CVE-2017-3730 in the critical feed json

Bad (EC)DHE parameters cause a client crash

published 2017-05-04 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12847

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
55.3%
EPSS 55.3% chance of exploitation in 30 days, percentile 99%
public exploits
1
Exploit-DB

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.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.1.0d-1

debian advisories DEBIAN-CVE-2017-3730

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-3730 updated cvss 5.9

openssl: Bad (EC)DHE parameters cause a client crash

  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl, openssl098e, openssl-perl Red Hat Enterprise Linux 7 OVMF, openssl, openssl098e, openssl-libs, openssl-perl Red Hat Enterprise Virtualization 3 mingw-virt-viewer, mingw32-virt-viewer, mingw64-virt-viewer Red Hat JBoss Core Services jbcs-httpd24-openssl Red Hat JBoss Enterprise Application Platform 5 openssl
    +4 more products
    Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 1 openssl Red Hat JBoss Enterprise Web Server 2 openssl Red Hat JBoss Web Server 3 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-41192)
  2. Published

Exploit prediction

55.29% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-41192 OpenSSL 1.1.0 - Remote Client Denial of Service dos, 2017-01-26

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.