danindiana/cve-2026-32746-mitigationAutomated mitigation tool for CVE-2026-32746, providing atomic rollback, multi-firewall support (UFW, firewalld, nftables, iptables), and defense-in-depth remediation for Linux systems.
CVE-2026-32746 is a hypothetical vulnerability used for educational demonstrations.
This tool addresses the "Perfect Storm" scenario: A memory-unsafe Telnet daemon (telnetd) combined with a race condition in privilege elevation, leading to a remote root instruction pointer (IP) hijack.
The tool has evolved into a modular security framework with the following capabilities:
--rollbacksystemctl mask to prevent inadvertent restarts by dependencies.ss and netstat.The tool follows a Strategy pattern to handle heterogeneous Linux environments.
classDiagram
class MitigationTool {
+args
+run() int
}
class StateManager {
+save_state()
+rollback()
}
class FirewallManager {
+backend: FirewallBackend
+block_port(port)
}
class FirewallBackend {
<<interface>>
+is_available() bool
+is_active() bool
+block_port(port)
}
MitigationTool *-- StateManager
MitigationTool *-- FirewallManager
FirewallManager o-- FirewallBackend
FirewallBackend <|-- UFWBackend
FirewallBackend <|-- FirewalldBackend
FirewallBackend <|-- IptablesBackend
FirewallBackend <|-- NftablesBackendThe following sequence describes the atomic "capture-before-fix" logic:
sequenceDiagram
participant User
participant Tool as MitigationTool
participant SM as StateManager
participant FM as FirewallManager
participant SV as ServiceManager
User->>Tool: --apply-fixes
Tool->>SM: save_state(POTENTIAL_SERVICES, firewall, port)
activate SM
SM->>SM: Capture systemd states
SM->>SM: Save to .cve_2026_32746_state.json
SM-->>Tool: State Captured
deactivate SM
Tool->>SV: remediate(active_services)
SV->>SV: stop / disable / mask
Tool->>FM: block_port(23)
FM->>FM: Apply Firewall Strategy (UFW/Firewalld/etc)
Tool-->>User: Success (Exit 0)sudo)sudo ./telnet_mitigation_tool.py --apply-fixes
Instantly restore system state from the captured snapshot.
sudo ./telnet_mitigation_tool.py --rollback
Preview exactly what changes the rollback will perform.
sudo ./telnet_mitigation_tool.py --rollback --dry-run
telnet_mitigation_tool.py: Core modular execution engine.test_v3_logic.py: Unit test suite supporting modular firewall backends.CHANGELOG.md: Historical version notes..cve_2026_32746_state.json: Local state storage (created during remediation).This project is licensed under the MIT License - see the LICENSE file for details.