Weak DH Key Exchange Supported (PCI DSS)

Medium Nessus Plugin ID 106459


A service on the remote host supports a weak key exchange mechanism


At least one of the services on the remote host supports a Diffie-Hellman key exchange using a public modulus smaller than 2048 bits.

Diffie-Hellman key exchanges with keys smaller than 2048 bits do not meet the PCI definition of strong cryptography as specified by NIST Special Publication 800-57 Part 1.

Diffie-Hellman moduli of up to 1024 bits are considered practically breakable by an attacker with very significant resources.


Consult the software's manual and reconfigure the service to use at least 2048-bit DH parameters. Alternatively, disable DH and use only Elliptic-curve Diffie-Hellman (ECDH) instead.

See Also


Plugin Details

Severity: Medium

ID: 106459

File Name: pci_weak_dh_under_2048.nasl

Version: $Revision: 1.2 $

Type: remote

Family: General

Published: 2018/01/29

Modified: 2018/01/31

Dependencies: 86328, 83875

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Temporal Vector: CVSS2#E:F/RL:TF/RC:ND


Base Score: 3.7

Temporal Score: 3.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:F/RL:T/RC:X

Vulnerability Information

Required KB Items: Settings/PCI_DSS

Exploit Available: true

Exploit Ease: Exploits are available

Reference Information

CVE: CVE-2015-4000

BID: 74733

OSVDB: 122331