A2SV alternatives

Looking for an alternative tool to replace A2SV? During the review of A2SV we looked at other open source tools. Based on their category, tags, and text, these are the ones that have the best match.

Top 3

  1. cipherscan (TLS/SSL cipher scanner)
  2. sslcaudit (auditing tool for SSL/TLS clients)
  3. testssl.sh (TLS/SSL configuration scanner)

These tools are ranked as the best alternatives to A2SV.

Alternatives (by score)

64

cipherscan

Introduction

The tool is of great assistance to quickly perform a security audit and may be used during penetrating testing, or guiding system administrator for system hardening.

Project details

cipherscan is written in Python, shell script.

Strengths and weaknesses

  • + Screen output is colored
  • + More than 1000 GitHub stars
  • + Very low number of dependencies
  • + Supported by a large company

    Typical usage

    • Information gathering
    • Security assessment
    • System hardening
    • Web application analysis

    cipherscan review

    60

    sslcaudit

    Introduction

    Sslcaudit is a tool that focuses on the niche of testing SSL/TLS clients.

    Project details

    sslcaudit is written in Python.

    Strengths and weaknesses

    • + The source code of this software is available

      Typical usage

      • Security assessment
      • Software testing

      sslcaudit review

      97

      testssl.sh

      Introduction

      Key features of testssl.sh include:

      • Clear output: you can tell easily whether anything is good or bad
      • Ease of installation: It works for Linux, Darwin, FreeBSD, NetBSD and MSYS2/Cygwin out of the box: no need to install or configure something, no gems, CPAN, pip or the like.
      • Flexibility: You can test any SSL/TLS enabled and STARTTLS service, not only webservers at port 443
      • Toolbox: Several command line options help you to run YOUR test and configure YOUR output
      • Reliability: features are tested thoroughly
      • Verbosity: If a particular check cannot be performed because of a missing capability on your client side, you'll get a warning
      • Privacy: It's only you who sees the result, not a third party
      • Freedom: It's 100% open source. You can look at the code, see what's going on and you can change it.

      Project details

      testssl.sh is written in shell script.

      Strengths and weaknesses

      • + Used language is shell script
      • + The source code of this software is available

        Typical usage

        • Application testing
        • Configuration audit

        testssl.sh review

        60

        tlsenum

        Introduction

        Tlsenum is a CLI tool to enumerate TLS protocol and TLS cipher support by a server. The tool lists then the output based on the order of priority. Tlsenum can be used to find the supported protocols and ciphers of a system and determine if it is properly hardened. This information can be useful to system administrators and pentesters doing a security assessment of the system.

        Project details

        tlsenum is written in Python.

        Strengths and weaknesses

        • + The source code of this software is available

          Typical usage

          • Information gathering
          • Security assessment
          • System enumeration
          • System hardening

          tlsenum review

          56

          MassBleed

          Introduction

          MassBleed is a SSL vulnerability scanner to check for several known vulnerabilities and attacks like DROWN, POODLE, and ShellShock.

          Project details

          MassBleed is written in Perl, Python, shell script.

          Strengths and weaknesses

          • + The source code of this software is available
          • - Full name of author is unknown
          • - Unknown project license

          Typical usage

          • Application security
          • Web application analysis

          MassBleed review

          74

          O-Saft

          Introduction

          O-Saft is the abbreviation for OWASP SSL advanced forensic tool.

          Project details

          O-Saft is written in Perl.

          Strengths and weaknesses

          • + The source code of this software is available

            Typical usage

            • Information gathering
            • Penetration testing
            • Security assessment
            • Vulnerability scanning
            • Web application analysis

            O-Saft review

            85

            SSLyze

            Introduction

            SSLyze provides a library for scanning services that use SSL/TLS for encrypted communications. It can be used to test their implementation.

            Project details

            74

            Certificate Transparency

            Introduction

            HTTPS connections use cryptographic functions to provide confidentiality and integrity. It can provide features like domain validation, end-to-end encryption, and a trust chain from certificate authorities down to the end-user. Any flaws can endanger these goals, like the impersonation of a system, man-in-the-middle (MitM) attacks, and website spoofing. This project helps to find flaws and improve the overall security of our internet.

            Project details

            60

            clinker

            Introduction

            Clinker is a tool to test SSL and TLS security for Firefox. It is an addon that shows the used cipher suites, certificates, and shows related security information of the connection itself.

            Requirements: Firefox

            Project details

            64

            Lemur

            Introduction

            With Lemur you can provide a central portal for developers and administrators to issue TLS certificates with predefined defaults.

            Lemur works on CPython 3.5 and uses the Flask framework. Another component it uses is cryptography to handle the creation of the certificates.

            Netflix develops on macOS and deploys on Ubuntu servers.

            Project details

            Lemur is written in Python.

            Strengths and weaknesses

            • + More than 500 GitHub stars
            • + The source code of this software is available
            • + Supported by a large company

              Typical usage

              • Certificate management

              Lemur review

              100

              mitmproxy (mitmproxy)

              Introduction

              The mitmproxy tool allows to intercept, inspect, modify, and replay traffic flows. It may be used for pentesting, troubleshooting, or learning about SSL/TLS.

              Project details

              mitmproxy is written in Python.

              Strengths and weaknesses

              • + More than 200 contributors
              • + More than 10000 GitHub stars
              • + The source code of this software is available

                Typical usage

                • Network analysis
                • Penetration testing
                • Security assessment

                mitmproxy review

                97

                OpenSSL

                Introduction

                This popular toolkit is used by many systems. It provides options like encryption and hashing of data, integrity testing, and digital certificates and signatures. Many software applications use the toolkit to provide support for these functions. OpenSSL also has a client utility that can be used on the command line to test, decrypt and encrypt data, and create certificates.

                Project details

                OpenSSL is written in C.

                Strengths and weaknesses

                • + The source code of this software is available
                • + Well-known library
                • - Major vulnerabilities in the past

                Typical usage

                • Certificate management
                • Data encryption

                OpenSSL review

                60

                pshtt

                Introduction

                Pshtt was developed to push organizations, including government departments, to adopt HTTPS across the enterprise.

                Project details

                pshtt is written in Python.

                Strengths and weaknesses

                • + More than 500 GitHub stars
                • + The source code of this software is available

                  Typical usage

                  • Security assessment
                  • Web application analysis

                  pshtt review

                  52

                  ssldump

                  Introduction

                  ssldump is protocol analyzer for SSLv3/TLS network traffic. It identifies TCP connections on the chosen network interface and tries to interpret it.

                  Project details

                  Strengths and weaknesses

                  • + The source code of this software is available
                  • - No updates for a while

                  Typical usage

                  • Network analysis

                  ssldump review

                  93

                  sslh

                  Introduction

                  A typical use case for multiplexing is to allow serving several services on one port. Port 443 is commonly used, as that is typically opened on firewalls to allow HTTPS traffic. By multiplexing it, you can also use SSH or other services on the same port.

                  Project details

                  63

                  SSLMap

                  Introduction

                  SSLMap uses its own SSL engine to avoid any dependencies or limitations with pre-installed libraries.

                  Project details

                  81

                  SSLsplit

                  Introduction

                  SSLsplit is a tool for man-in-the-middle attacks against SSL/TLS encrypted network connections. Connections are transparently intercepted through a network address translation engine and redirected to SSLsplit. SSLsplit terminates SSL/TLS and initiates a new SSL/TLS connection to the original destination address, while logging all data transmitted. SSLsplit is intended to be useful for network forensics and penetration testing.

                  SSLsplit supports plain TCP, plain SSL, HTTP and HTTPS connections over both IPv4 and IPv6. For SSL and HTTPS connections, SSLsplit generates and signs forged X509v3 certificates on-the-fly, based on the original server certificate subject DN and subjectAltName extension. SSLsplit fully supports Server Name Indication (SNI) and is able to work with RSA, DSA and ECDSA keys and DHE and ECDHE cipher suites. Depending on the version of OpenSSL, SSLsplit supports SSL 3.0, TLS 1.0, TLS 1.1 and TLS 1.2, and optionally SSL 2.0 as well. SSLsplit can also use existing certificates of which the private key is available, instead of generating forged ones. SSLsplit supports NULL-prefix CN certificates and can deny OCSP requests in a generic way. For HTTP and HTTPS connections, SSLsplit removes response headers for HPKP in order to prevent public key pinning, for HSTS to allow the user to accept untrusted certificates, and Alternate Protocols to prevent switching to QUIC/SPDY. As an experimental feature, SSLsplit supports STARTTLS mechanisms in a generic manner.

                  Project details

                  SSLsplit is written in C.

                  Strengths and weaknesses

                  • + The source code of this software is available

                    Typical usage

                    • Learning
                    • Network analysis
                    • Penetration testing
                    • Security assessment

                    SSLsplit review

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