SSL/TLS EXPORT_DHE <= 512-bit Export Cipher Suites Supported (Logjam)

Low Nessus Plugin ID 83738

Synopsis

The remote host supports a set of weak ciphers.

Description

The remote host supports EXPORT_DHE cipher suites with keys less than or equal to 512 bits. Through cryptanalysis, a third party can find the shared secret in a short amount of time.

A man-in-the middle attacker may be able to downgrade the session to use EXPORT_DHE cipher suites. Thus, it is recommended to remove support for weak cipher suites.

Solution

Reconfigure the service to remove support for EXPORT_DHE cipher suites.

See Also

https://weakdh.org/

Plugin Details

Severity: Low

ID: 83738

File Name: ssl_dh_export_supported_ciphers.nasl

Version: $Revision: 1.9 $

Type: remote

Family: Misc.

Published: 2015/05/21

Modified: 2016/06/16

Dependencies: 21643

Risk Information

Risk Factor: Low

CVSSv2

Base Score: 2.6

Temporal Score: 2.2

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

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

Vulnerability Information

Required KB Items: SSL/Supported

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/05/20

Vulnerability Publication Date: 2015/05/20

Reference Information

CVE: CVE-2015-4000

BID: 74733

OSVDB: 122331