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Insecure encryption algorithm - Blowfish

Description​

Insecure algorithms such as Blowfish are used to encrypt the information stored in the code.

Impact​

Decrypt the credentials that are stored encrypted with blowfish.

Recommendation​

Use secure algorithms such as AES or RSA.

Threat​

Unauthorized user with access to the code.

Expected Remediation Time​

⌚ 30 minutes.

Score​

Default score using CVSS 3.1. It may change depending on the context of the vulnerability.

Base​

  • Attack vector: A
  • Attack complexity: L
  • Privileges required: L
  • User interaction: N
  • Scope: U
  • Confidentiality: L
  • Integrity: L
  • Availability: N

Temporal​

  • Exploit code madurity: X
  • Remediation level: X
  • Report confidence: X

Result​

  • Vector string: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:X/RL:X/RC:X
  • Score:
    • Base: 4.6
    • Temporal: 4.6
  • Severity:
    • Base: Medium
    • Temporal: Medium

Code Examples​

Compliant code​

The resource correctly configures a secure encryption algorithm

http {
  server {
    index: "index.html";
    listen: "localhost:4446 ssl";
    server_name: "localhost";
    ssl_prefer_server_ciphers: "on";
    ssl_ciphers: "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256"";
    ssl_certificate: "cert.crt";
    ssl_certificate_key: "cert.key";
    ssl_protocols: "SSLv3 TLSv1.2";
  }
}

Non compliant code​

The resource uses the blowfish insecure encryption algorithm

http {
  server {
    index: "index.html";
    listen: "localhost:4446 ssl";
    server_name: "localhost";
    ssl_prefer_server_ciphers: "on";
    //cipher configured with a blowfish type encryption algorithm
    ssl_ciphers: blowfish_unique;
    ssl_certificate: "cert.crt";
    ssl_certificate_key: "cert.key";
    ssl_protocols: "SSLv3 TLSv1 TLSv1.1";
  }
}

Requirements​

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