offensive-tls-attacks

offensive-tls-attacks is a skill for Claude Code, Codex from Miosa-osa/OSA. It costs 237 tokens per session (6,217 once invoked), scanned A, a copy of offensive-tls-attacks, Apache-2.0.

A guide to assessing TLS and SSL, the protocols used to encrypt network connections. It covers implementation flaws, unsafe settings, protocol downgrades, and issues affecting network services and mobile apps.

In plain words
What is it for?
It is for reviewing TLS/SSL configurations, testing downgrade and cross-protocol issues, and assessing encryption used by services and mobile applications.
Why use it?
It helps find cases where encrypted connections can be weakened or misused because of outdated protocols, vulnerable options, or configuration errors. Use it only on authorized systems.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for reviewing TLS/SSL configurations, testing downgrade and cross-protocol issues, and assessing encryption used by services and mobile applications.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/miosa-osa/osa/offensive-tls-attacks
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Miosa-osa/OSA --skill offensive-tls-attacks
Clone the repo
git clone --depth 1 https://github.com/Miosa-osa/OSA

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for offensive-tls-attacks

README.md
[![agentmods](https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-tls-attacks/github.svg)](https://agentmods.dev/skills/miosa-osa/osa/offensive-tls-attacks)
Your own site
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-tls-attacks"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-tls-attacks/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for offensive-tls-attacks

Your own site · 80×15
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-tls-attacks"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-tls-attacks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 237 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,217 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00237 $0.06217
Opus 5.5 $0.00095 $0.02487
Sonnet 5.5 $0.00047 $0.01243
Haiku 4.5 $0.00024 $0.00622

Measured 1mo ago against content hash c5bbc71cd9dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

offensive-tls-attacks scanned grade A with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

adb shell chmod 644 /system/etc/security/cacerts/9a5ba575.0

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sI -H "Accept-Encoding: gzip, deflate" https://target.com/ | \
Origin

This is a copy

86% identical to offensive-tls-attacks — 42 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

priv/skills/offensive-tls-attacks/SKILL.md · 576 lines

How it starts

The opening of the file, as written. The whole thing — 576 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TLS/SSL Attacks and Misconfiguration Exploitation

You are performing offensive TLS/SSL analysis against target infrastructure. This skill covers the full attack surface of transport layer security -- from protocol-level cryptographic weaknesses to implementation bugs, certificate validation failures, and deployment misconfigurations. You treat every TLS handshake as an opportunity for enumeration and every certificate chain as a trust boundary to probe.

Quick Workflow

  1. Enumerate the target's TLS configuration -- supported protocols, cipher suites, certificate chain, extensions.
  2. Identify deprecated protocols (SSLv2, SSLv3, TLS 1.0, TLS 1.1) and weak cipher suites (export, NULL, RC4, DES, 3DES).
  3. Check for known protocol vulnerabilities -- POODLE, DROWN, FREAK, BEAST, Heartbleed.
  4. Test compression oracle exposure -- CRIME at the TLS layer, BREACH at the HTTP layer.
  5. Validate certificate handling -- chain verification, hostname matching, pinning enforcement, revocation checking.
  6. Assess TLS 1.3 features -- 0-RTT replay, downgrade sentinel presence, supported groups.
  7. For mobile targets, bypass certificate pinning and intercept traffic.
  8. Document findings with protocol evidence and remediation priorities.

TLS Enumeration and Scanning

Begin every TLS engagement with comprehensive enumeration. Use testssl.sh as the primary tool -- it requires no dependencies beyond bash and OpenSSL and produces detailed output covering protocols, ciphers, vulnerabilities, and certificate details.

# Full scan with all checks, output to JSON and HTML
testssl.sh --jsonfile results.json --htmlfile results.html \
  --ip one --sneaky --warnings batch \
  target.com:443

# Quick protocol and cipher check
testssl.sh --protocols --ciphers target.com:443

# Check only for specific vulnerabilities
testssl.sh --heartbleed --ccs-injection --ticketbleed \
  --robot --poodle --beast --crime --breach --drown --freak \
  --logjam --sweet32 target.com:443

# Scan multiple targets from a file
testssl.sh --file targets.txt --parallel 10 --jsonfile bulk_results.json

Read the full file on GitHub · 576 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 576 lines · 237 tokens per session scan A c5bbc71cd9dc

Subscribe to this mod's changes

offensive-tls-attacks is a skill published in the GitHub repository Miosa-osa/OSA (78 stars, last pushed 11d ago), licensed Apache-2.0. It adds 237 tokens to every session and 6,217 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it A with 2 findings (asks for root, makes network calls). It is 86% identical to offensive-tls-attacks, differing in 42 lines, and is treated as a copy.

Related

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