Detections
Analytics
SSL Server Accepts Weak Diffie-Hellman Keys
info Nessus Plugin ID 53360
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Synopsis
The remote SSL/TLS server accepts a weak Diffie-Hellman public value.Description
The remote SSL/TLS server accepts a weak Diffie-Hellman (DH) public key value.This flaw may aid an attacker in conducting a man-in-the-middle (MiTM) attack against the remote server since it could enable a forced calculation of a fully predictable Diffie-Hellman secret.
By itself, this flaw is not sufficient to set up a MiTM attack (hence a risk factor of 'None'), as it would require some SSL implementation flaws to affect one of the clients connecting to the remote host.
Solution
OpenSSL is affected when compiled in FIPS mode. To resolve this issue, either upgrade to OpenSSL 1.0.0, disable FIPS mode or configure the ciphersuite used by the server to not include any Diffie-Hellman key exchanges.PolarSSL is affected. To resolve this issue, upgrade to version 0.99-pre3 / 0.14.2 or higher.
If using any other SSL implementation, configure the ciphersuite used by the server to not include any Diffie-Hellman key exchanges or contact your vendor for a patch.
See Also
Plugin Details
Severity: Info
ID: 53360
File Name: polarssl_dh_vuln.nasl
Version: 1.36
Type: Remote
Family: General
Published: 4/11/2011
Updated: 4/13/2026
Supported Sensors: Nessus
Vulnerability Information
Required KB Items: SSL/Supported
Exploited by Nessus: true