3DES vulnerable to SWEET32 attack

Traefik Traefik v2
1

I attempted to add the Cipher Suites using your guidelines. But still, the traefik is using default Cipher Suites. In my domains, this might lead to a security problem.

64-bit block cipher 3DES vulnerable to SWEET32 attack
Forward Secrecy not supported by any cipher

2

Hello,

I think you are the authors of the issues:

I will answer based on the content of these issues.

2022/09/06 07:43:53 command traefik error: field not found, node: cipherSuites
2022/09/06 07:44:14 command traefik error: field not found, node: minVersion

The tls section has been placed inside the static configuration file but this section must be a part of the dynamic configuration

Also, the syntax is incomplete.

The right syntax:

[tls.options.default]
minVersion = "VersionTLS12"
cipherSuites = [
 "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
 "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
 "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
 "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
 "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
 "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"
]

Doc about cipher-suites

3

Hello, I added the same thing you described, however the warning is still appearing.

  TLSv1.0: 
|     ciphers: 
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 4096) - C
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 4096) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 4096) - A
|     compressors: 
|       NULL
|     cipher preference: client
|     warnings: 
|       64-bit block cipher 3DES vulnerable to SWEET32 attack
|       Forward Secrecy not supported by any cipher
|   TLSv1.1: 
|     ciphers: 
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 4096) - C
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 4096) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 4096) - A
|     compressors: 
|       NULL
|     cipher preference: client
|     warnings: 
|       64-bit block cipher 3DES vulnerable to SWEET32 attack
|       Forward Secrecy not supported by any cipher
|   TLSv1.2: 
|     ciphers: 
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 4096) - C
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 4096) - A
|       TLS_RSA_WITH_AES_128_GCM_SHA256 (rsa 4096) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 4096) - A
|       TLS_RSA_WITH_AES_256_GCM_SHA384 (rsa 4096) - A
|     compressors: 
|       NULL
|     cipher preference: client
|     warnings: 
|       64-bit block cipher 3DES vulnerable to SWEET32 attack
|       Forward Secrecy not supported by any cipher
|_  least strength: C

Could you please help me to resolve the same?

traefik.toml

[global]
  sendAnonymousUsage = false

[serversTransport]
  insecureSkipVerify = true

[entryPoints]
[entryPoints.http]
   address = ":80"
   [entryPoints.http.http.redirections.entryPoint]
     to = "https"
     scheme = "https"
   [entryPoints.http.forwardedHeaders]
     insecure = true

[entryPoints.https]
   address = ":443"
   [entryPoints.https.forwardedHeaders]
     insecure = true
   [tls.options.default]      
      minVersion = "VersionTLS12"
      cipherSuites = [
        "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
        "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
        "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
        "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
        "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
        "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
      ]
[providers]
  providersThrottleDuration = "2s"
  [providers.docker]
    watch = true
    endpoint = "unix:///var/run/docker.sock"
  [providers.file]
    filename = "/rules.toml"

[log]
  level = "DEBUG"
  filePath = "/var/log/traefik/service.log"

[accessLog]
  bufferingSize = 100
  filePath = "/var/log/traefik/access.log"

[certificatesResolvers]
  [certificatesResolvers.default]
    [certificatesResolvers.default.acme]
      email = ""
      storage = "acme.json"
      [certificatesResolvers.default.acme.httpChallenge]
        entryPoint = "HTTP"
4

You placed the tls section inside the static configuration file but this section must be a part of the dynamic configuration

Read my previous message in detail

5

Hi,

Actually, I've updated the traefik.toml file with the tls entries. I realized that this is not the correct file in which to put the tls entry. I mapped the domain and middleware using the rules.toml file. If you share the right file, which adds the TLS entry, it will be very helpful for me.

6

You have to move the tls section from traefik.toml to rules.toml.

7

Thanks for the information.Just add the tls entry to the rules.toml file's top. Right?
[tls.options.default]
minVersion = "VersionTLS12"
cipherSuites = [
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"

8

I forget the last ], so the configuration is:

[tls.options.default]
minVersion = "VersionTLS12"
cipherSuites = [
 "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
 "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
 "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
 "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
 "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
 "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256",
]
9

Thanks @ldez The issue has been resolved.

I have to make HSTS active. The following entries have been added to the rules.toml file, however, they are not active.

traefik.frontend.headers.STSSeconds: "31536000"

traefik.frontend.headers.STSIncludeSubdomains: "true"

traefik.frontend.headers.STSPreload: "true"

10

Also, tried this one.

[http.middlewares]
[http.middlewares.middleware1.redirectScheme]
scheme = "https"
permanent = true
[http.middlewares.security-headers.headers]
BrowserXssFilter = true
ContentTypeNosniff = true
ForceSTSHeader = true
FrameDeny = true
SSLRedirect = true
STSIncludeSubdomains = true
STSPreload = true
STSSeconds = 315360000

11

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