R.U.D.Y. (slow POST)
Huge Content-Length then a byte-by-byte body starves sessions
categoryNetwork and infrastructure attacksseverityLowdetectabilityLowlabnot yet measured
Classification
26 values: 15 imported, 1 derived, 10 machine-classified. What do these mean?
Exploitability
| Attack vector | Network attacks |
|---|---|
| Reach (CVSS) | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Attacker skill required | Low |
| Resources required | Low |
| Likelihood / prevalence | Medium |
| Maturity | Established |
Impact & scope
| Severity | Low |
|---|---|
| Impact | Availability |
| Platform | IaaSLinuxmacOSWindows |
| Environment | On-premises |
| Target asset class | Web app / API |
| Kill-chain phase (tactic) | Impact |
Detection & telemetry
| Detectability | Low |
|---|---|
| Data sources (ATT&CK data components) | Application Log ContentFirewall Rule ModificationHost StatusNetwork Connection CreationNetwork Traffic ContentNetwork Traffic FlowProcess Access |
Detection & response
Mitigated by 12
- M1037 attack-mitigation
D3-APCAd3fendD3-CSPPd3fendD3-ISVAd3fendD3-ITFd3fendD3-NTCDd3fendD3-NTFd3fendD3-NTSAd3fendD3-PHDURAd3fendD3-PMADd3fendD3-RTSDd3fendD3-UGLPAd3fend
Detected by 1
- DET0173 attack-detection-strategy
Attack relationships
- Parent: DoS / DDoS
- Parent: LAND attack
- Parent: Phantom domain
Framework references
- Primary source: https://www.cloudflare.com/learning/ddos/ddos-attack-tools/r-u-dead-yet-rudy/
- attack: T1499.002 (primary)
- capec: CAPEC-469
Evidence & sources
- ev-0001 (Cyber Attack Taxonomy) — Name, definition and Example/ID taken verbatim from the 'Network and infrastructure attacks' table, line 150 of Cyber-Attack-Taxonomy.md
- ev-0002 (Seeded-record enrichment run 2026-09-30 (crosswalk + facet classification)) — Crosswalk to attack:T1499.002, capec:CAPEC-469 as the nearest framework entries; ids verified to exist in the cached catalogues.
- ev-0003 (CAPEC — Common Attack Pattern Enumeration and Classification 3.9) — CAPEC-469 HTTP DoS: CAPEC prerequisites for this pattern
HTTP protocol is usedWeb server used is vulnerable to denial of service via HTTP flooding