---
title: Do not use weak SSL protocols
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Static Code Analysis (SAST) > SAST
  Rules > Do not use weak SSL protocols
---

# Do not use weak SSL protocols

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# Important note for users on the following Datadog sites: app.ddog-gov.com

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This product is not supported for your selected [Datadog site](https://docs.datadoghq.com/getting_started/site.md). ().
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{% /callout %}

## Metadata{% #metadata %}

**ID:** `csharp-security/weak-ssl-protocols`

**Language:** C#

**Severity:** Warning

**Category:** Security

**CWE**: [327](https://cwe.mitre.org/data/definitions/327.html)

**Related CWEs**:

- [328](https://cwe.mitre.org/data/definitions/328.html)
- [916](https://cwe.mitre.org/data/definitions/916.html)
- [1240](https://cwe.mitre.org/data/definitions/1240.html)

## Description{% #description %}

Weak encryption protocols should not be used. TLS versions 1.0 and 1.1 have been deprecated. TLS 1.2 (or, even better, TLS 1.3) should be used instead.

#### Learn More{% #learn-more %}

- [Wikipedia: Transport Layer Security](https://en.wikipedia.org/wiki/Transport_Layer_Security)
- [CWE-327: Use of a Broken or Risky Cryptographic Algorithm](https://cwe.mitre.org/data/definitions/327)

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```csharp
using System.Net;

class MyClass {
    public static void routine()
    {
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
        System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
    }
}
```

## Compliant Code Examples{% #compliant-code-examples %}

```csharp
using System.Net;

class MyClass {
    public static void routine()
    {
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls13;
        
        SslProtocols = SslProtocols.Tls12;
    }
}
```
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