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.
npx skills add Miosa-osa/OSA --skill offensive-krack-fragattacksgit clone --depth 1 https://github.com/Miosa-osa/OSAWrote 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.
[](https://agentmods.dev/skills/miosa-osa/osa/offensive-krack-fragattacks)<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-krack-fragattacks"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-krack-fragattacks/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.
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-krack-fragattacks"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-krack-fragattacks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00125 | $0.01448 |
| Opus 5.5 | $0.00050 | $0.00579 |
| Sonnet 5.5 | $0.00025 | $0.00290 |
| Haiku 4.5 | $0.00013 | $0.00145 |
Grade B, and why
offensive-krack-fragattacks scanned grade B with 1 finding 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 rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo ./krack-test-client.py --interface wlan0 How it starts
The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.
KRACK & FragAttacks
Two attack families against WPA2 client implementations. Both well-disclosed (KRACK 2017, FragAttacks 2021) and largely patched on modern OSes — but the embedded/IoT long tail keeps them in scope for many engagements.
When These Apply
| Family | Target | Patch Status |
|---|---|---|
| KRACK | WPA2 supplicants in 4-way handshake / GTK / FT / TDLS | Major OSes patched 2017–2018 |
| FragAttacks | Frame fragmentation/aggregation across WPA2/3 | Most stacks patched 2021–2022 |
Probability of success today is high only against:
- Embedded OEM devices (cameras, sensors, point-of-sale)
- Old Android phones (<8 unpatched)
- Industrial / SCADA Wi-Fi clients
- Wi-Fi-enabled toys, smart bulbs, no-name IoT
Modern Win11 / iOS 16+ / Android 13+ / hostapd-2.10 are mitigated.
KRACK — Key Reinstallation
The 4-way handshake's M3 retransmission causes the supplicant to reinstall the same PTK with reset nonce/replay counters. Frames encrypted under the reused keystream become decryptable.
# Vanhoef's official test scripts
git clone https://github.com/vanhoefm/krackattacks-scripts
cd krackattacks-scripts/krackattack
sudo ./krack-test-client.py --interface wlan0
# Tests the supplicant on a connected client
Output identifies which CVE variants the client is vulnerable to.
Practical Outcomes
When successful:
- Decryption of WPA2-encrypted frames between client and AP
- TKIP downgrade enables packet injection
- Recovery of session keys for the duration of the affected key cycle
Not a PSK recovery — you don't get the wireless password from KRACK.
FragAttacks — Frame Splicing
FragAttacks abuse 802.11 fragmentation and aggregation to inject frames that mix encrypted and plaintext fragments, or to splice attacker-controlled fragments into legitimate frames.
git clone https://github.com/vanhoefm/fragattacks
cd fragattacks
sudo ./test-fragattacks.py wlan0 --interface wlan0
# Suite of ~12 tests covering each variant
| CVE | Mechanism |
|---|---|
| CVE-2020-24588 | A-MSDU spoofing — inject crafted A-MSDU subframes |
| CVE-2020-24587 | Mixed-key fragment cache poisoning |
| CVE-2020-24586 | Decoupled fragment cache → reuse |
| CVE-2020-26139 | Forwarding plaintext frames before authentication |
| CVE-2020-26140 | Accepting plaintext frames in protected network |
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.
- 1mo ago First seen · 155 lines · 125 tokens per session scan B 865099636e10
offensive-krack-fragattacks is a skill published in the GitHub repository Miosa-osa/OSA (78 stars, last pushed 11d ago), licensed Apache-2.0. It adds 125 tokens to every session and 1,448 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-14.
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