11 01 Tbd I Radius Security
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The document discusses vulnerabilities in RADIUS and IEEE 802.1X security. It outlines that RADIUS has vulnerabilities like offline dictionary attacks on shared secrets due to low-entropy passwords. Real-time decryption of hidden attributes is possible if request authenticators repeat. It recommends fixes like using strong shared secrets, unique request authenticators, RADIUS over IPsec, and per-packet authentication with message authenticators.
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Disobey 2024: Karri Huhtanen: Wi-Fi Roaming Security and Privacy
Karri Huhtanen's presentation about Wi-Fi Roaming Security and Privacy in Disobey 2024 on the 16th of February 2024 ( https://disobey.fi/2024/profile/disobey2024-154-wi-fi-roaming-security-and-privacy ).
Wi-Fi network security presentations are often about breaking the link level (radio) encryption or deploying evil twin Wi-Fi access points to perform man-in-the-middle attacks. This presentation focuses instead to the security and privacy in Wi-Fi roaming, offloading and federated networks, where there are different issues and vectors to utilise or defend against.
Hacking wireless networks
The document discusses wireless network penetration testing techniques. It demonstrates automated cracking of WEP and WPA networks using tools like aircrack-ng. It also covers bypassing MAC address filtering and cracking WPA2 networks using Reaver by exploiting WPS. The document provides information on wireless standards like 802.11a/b/g/n and their characteristics. It describes common wireless encryption and authentication methods including WEP, WPA, WPA2 etc. Finally, it includes checklists for wireless vulnerability assessments and requirements for wireless cracking labs.
Wpa vs Wpa2
WPA and WPA2 are security protocols for wireless networks. WPA2 improved upon WPA by supporting stronger AES encryption instead of TKIP, separating authentication from encryption, and being more secure against attacks. Specifically, WPA2 uses 128-bit AES encryption, whereas WPA only supports the weaker TKIP encryption. Theoretically, WPA2 cannot be hacked while WPA remains vulnerable to certain attacks.
RADIUS
RADIUS (Remote Authentication Dial In User Service) is a protocol that provides authentication, authorization and accounting functionality. It is commonly used for remote access to networks using modems or VPNs. The RADIUS protocol uses UDP and runs on ports 1812 and 1813. It operates on a client-server model where the client is typically a network access server and the server handles authentication requests from clients. RADIUS provides basic security through MD5 hashing of packets and a shared secret between clients and servers. However, it is vulnerable to sniffing and spoofing attacks.
IEEE 802.1X and Axis’ Implementation
IEEE 802.1X is an authentication and authorization technique. Many Axis network video products support
IEEE 802.1X as a security feature. In this white paper we will discuss the background as well as the
working principle of IEEE 802.1X. We will also describe how 802.1X in Axis network camera products
should be used, and when RADIUS (remote authentication dial-in user service) servers and switches are
well configured.
New flaws in WPA-TKIP
Presentation given at the Brucon security conference in Ghent, Belgium. Two new attacks are described. The first is a Denial of Service attack capable of halting all traffic for one minute by injecting only two frames. The second attack allows the injection of arbitrary many packets towards a client. It is shown that this can be used to perform a portscan on any TKIP-secured client.
WPA2
WPA2 is the latest security standard for Wi-Fi networks. It uses AES encryption and 802.1X/EAP authentication to securely transmit data between wireless devices and access points. The four phase process establishes a secure communication context through agreeing on security policies, generating a master key, creating temporary keys, and using the keys to encrypt transmissions. WPA2 provides stronger security than previous standards like WEP and WPA through more robust encryption and authentication methods.
The Network Protocol Stack Revisited
This document provides an overview of network security concepts across different layers of the network protocol stack. It discusses security issues and common attacks at layers 2-7, as well as approaches to mitigate risks, including port security, VLANs, DHCP snooping, IP spoofing prevention, firewalls, TLS, VPNs, and honeypots. Protocol tunneling techniques like SSH port forwarding and DNS tunneling are also covered as ways to bypass network access controls.
Defending Against Attacks With Rails
Let's face it, the web can be a dangerous place. So how do you protect your users and yourself? Tony Amoyal answers that and more as he shows how Rails can help protect against miscreants.
Unit 3:Enterprise Security
This document discusses several cybersecurity topics including ARP spoofing, password cracking, WEP vulnerabilities, MAC flooding, IP spoofing, and SYN flood attacks. It provides details on how each works and potential prevention and mitigation techniques. ARP spoofing allows attackers to intercept network traffic by spoofing MAC addresses. Password cracking involves recovering passwords through methods like brute force attacks or rainbow tables. WEP has security flaws in its use of short, static IVs and lack of integrity checks. MAC flooding overwhelms switches by sending fake MAC addresses. IP spoofing and SYN floods are types of DDoS attacks that respectively modify source IP addresses or abuse the TCP three-way handshake. Defenses include ingress filtering, egress filtering, and SYN cookies.
Ipsec vpn v0.1
IPSec is an open standard protocol suite that provides security services like data confidentiality, integrity, and authentication for IP communications. It operates at the network layer and can be used to secure communication between hosts, network devices, and between hosts and devices. The key components of IPSec include Internet Key Exchange (IKE) for setting up Security Associations (SA), the Authentication Header (AH) for data integrity and authentication, and the Encapsulating Security Payload (ESP) for confidentiality, integrity, and authentication.
Wi-Fi Roaming Security and Privacy
The RADIUS accounting messages contain cleartext user identity and device identifiers that can be used to track users even if the authentication traffic is encrypted. Some ways to mitigate this are:
- Use EAP-TLS or EAP-PWD authentication to avoid sending IMSI or username in cleartext
- Enable IMSI privacy in EAP-SIM/EAP-AKA methods
- Tunnel or encrypt RADIUS accounting messages to prevent eavesdropping of user identities
- Use temporary identifiers instead of permanent ones in accounting messages
Proper configuration of authentication and accounting privacy features can help prevent user tracking via network monitoring of 802.1X and RADIUS traffic. However, complete anonymity is difficult to achieve in centralized network authentication systems
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Disobey 2024: Karri Huhtanen: Wi-Fi Roaming Security and Privacy
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11 01 Tbd I Radius Security
- 1. IEEE 802.1X and RADIUS Security Bernard Aboba Ashwin Palekar Microsoft November 2001 Warren Barkley, Tim Moore, Bernard Aboba/Microsoft
- 12. Summary – Vulnerabilities November 2001 Warren Barkley, Tim Moore, Bernard Aboba/Microsoft
- 14. Feedback? November 2001 Warren Barkley, Tim Moore, Bernard Aboba/Microsoft