# Insecure TLS Configuration

> Detects insecure TLS settings including disabled certificate verification, outdated protocol versions, and weak cipher suites.

- Skill: `zakirkun/insecure-tls-configuration` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add zakirkun/insecure-tls-configuration`
- Raw SKILL.md: https://api.skillmd.com/api/skills/zakirkun/insecure-tls-configuration/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: zakirkun (https://skillmd.com/u/zakirkun)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/zakirkun/insecure-tls-configuration

---


# Insecure TLS Configuration

## Overview
TLS misconfigurations expose communications to interception and tampering:
1. **InsecureSkipVerify**: Disables certificate validation entirely — trivial MITM
2. **TLS 1.0/1.1**: Deprecated protocols with known weaknesses (BEAST, POODLE)
3. **Weak cipher suites**: RC4, DES, 3DES, EXPORT ciphers
4. **Self-signed cert acceptance**: `verify=False` in Python requests

## Remediation
- Never set `InsecureSkipVerify: true` in production
- Enforce TLS 1.2 minimum (TLS 1.3 preferred)
- Use only AEAD cipher suites (AES-GCM, ChaCha20-Poly1305)
- Always verify certificates in HTTP clients

**Vulnerable (Go):**
```go
tr := &http.Transport{
    TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
```

**Safe (Go):**
```go
tr := &http.Transport{
    TLSClientConfig: &tls.Config{
        MinVersion: tls.VersionTLS13,
    },
}
```