👩‍💻 Nginx Path Configuration Pitfalls.

• Nginx — это веб-сервер, на котором работает треть всех сайтов в мире. Но если забыть или проигнорировать некоторые ошибки в настройках, можно стать отличной мишенью для атакующих. Благодаря этому материалу, можно понять какие ошибки в конфигурациях встречаются чаще всего и как их исправить.

Attacks:
• Nginx Configuration Vulnerability;
• Exploiting Trailing Slash Misconfiguration;
• Exploiting Parent Directory Access;
• Impact Without Trailing Slash on Alias;
• Combined Impact.

Defend Against Attacks:
• Update Nginx;
• Configuration Check;
• Use Configuration Management;
• Security Headers;
• Access Control;
• Directory Listing;
• Alias Traversal Protection;
• HTTP to HTTPS Redirect;
• SSL Configuration;
• Rate Limiting;
• Connection Limits;
• Custom Error Pages;
• Gzip Compression;
• Client-Side Caching;
• HTTP2 Protocol;
• Secure File Permissions;
• Web Application Firewall (WAF);
• Monitoring and Logging;
• SSH Hardening;
• Firewall Configuration;
• Two-Factor Authentication;
• Regular Backups;
• Deny Hidden Files;
• IP Whitelisting;
• Disable Unused Modules;
• Use Trailing Slash in Alias Directives;
• Regular Expression Matching;
• Implement Strict Location Paths.

#Nginx #devsecops

👨‍💻 DevOps and IT Cheat-Sheet Collection.

• Коллекция полезных шпаргалок для DevOps и IT специалистов. Содержание следующее:

- #Nginx;
- #Docker;
- #Ansible;
- #Python;
- Go (Golang);
- #Git;
- Regular Expression (Regex);
- #PowerShell;
- #VIM;
- #Jenkins;
- Continuous Integration and Continuous Delivery (CI/CD);
- #Kubernetes;
- #Linux;
- Redis;
- Slack;
- Puppet;
- Google Cloud Developer;
- PostgreSQL;
- Ajax;
- Amazon Web Services (AWS).

➡️ https://github.com/sk3pp3r/cheat-sheet-pdf

#CheatSheet #DevOps

👩‍💻 Attacking Nginx.

• Nginx — это веб-сервер, на котором работает треть всех сайтов в мире. Но если забыть или проигнорировать некоторые ошибки в настройках, можно стать отличной мишенью для атакующих:

• Missing Root Location in Nginx Configuration:
- Explanation;
- The Missing Root Location Issue.

• Attack Scenario: Exploiting the Missing Root Location:
- Mitigating the Risk.

• Unsafe Path Restriction in Nginx:
- Explanation;
- Potential Bypass Techniques;
- Attack Scenario: Exploiting Path Restriction Bypass;
- Mitigation Strategies.

• Unsafe variable use / HTTP Request Splitting:
- Unsafe Use of Variables: $uri and $document_uri;
- Regex Vulnerabilities;
- Safe Configuration;
- Attack Scenarios and Detection Techniques;
- CRLF Injection and HTTP Request Splitting;
- Bypassing Path Restrictions Using Encoded Characters;
- Examples of Vulnerable Configurations.

• Raw Backend Response Reading:
- Example Scenario: Exposing Raw Backend Responses;
- Example uWSGI Application;
- Nginx Configuration;
- Example Invalid HTTP Request;
- Example Output for Invalid Request;
- Attack Scenario;
- Mitigation Strategies.

• merge_slashes set to off:
- merge_slashes Directive;
- Malicious Response Headers;
- map Directive Default Value;
- DNS Spoofing Vulnerability;
- proxy_pass and internal Directives.

• proxy_set_header Upgrade & Connection:
- Vulnerable Configuration;
- Vulnerability;
- Attack Scenario;
- Mitigation;
- Additional Attack Scenarios and Commands.

#Nginx