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How to disable the unsecure cipher suites on the SonicWall SRA/SMA 100 series?

03/26/2020 24 People found this article helpful 95,473 Views

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    Description

    AES is a more efficient cryptographic algorithm. The main strength lies in the option for various key lengths (AES uses keys of 128, 192 or 256 bits) which makes it stronger than DES. 

    The vulnerabilities are seen in a PCI scan due to SSL 64-bit Block Size Cipher Suites 443 / tcp / www CVE-2016-2183, CVE-2016-6329 and SSL Medium Strength Cipher Suites.

     

     Image

     

    Cause

    3DES uses 64 bit blocks.

    Resolution

    Form 9.0.0.0-9sv onwards , an option, "Ciphersuites", is available in System > Administration page.  Administrator could choose to set Ciphersuites  : "Modern compatibility" to disable unsecured ciphers.

    Image

     

     

    Image 

    If the "Ciphersuites" are set to Modern compatibility, the following ciphersuites are used:-

    [ 
    "ECDHE-ECDSA-AES256-GCM-SHA384",
    "ECDHE-RSA-AES256-GCM-SHA384",
    "ECDHE-ECDSA-CHACHA20-POLY1305",
    "ECDHE-RSA-CHACHA20-POLY1305",
    "ECDHE-ECDSA-AES128-GCM-SHA256",
    "ECDHE-RSA-AES128-GCM-SHA256",
    "ECDHE-ECDSA-AES256-SHA384",
    "ECDHE-RSA-AES256-SHA384",
    "ECDHE-ECDSA-AES128-SHA256",
    "ECDHE-RSA-AES128-SHA256"
    ],
    "tls_versions": ["TLSv1.2" ]

    ISSUE ID:

    211452

    Related Articles

    • Configuring Device Management based on Device ID for SMA 100
    • CT with Device Guard is stuck on Identifying when GVC Client is installed
    • SMA1000: CT compatibility with 3rd party VPN clients like GVC, Citrix and Fortinet

    Categories

    • Secure Mobile Access > SMA 100 Series > Vulnerabilities

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