IPSECv6 Peach Pit User Guide. Peach Fuzzer, LLC. v3.7.50
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1 IPSECv6 Peach Pit User Guide Peach Fuzzer, LLC v3.7.50
2 Copyright 2015 Peach Fuzzer, LLC. All rights reserved. This document may not be distributed or used for commercial purposes without the explicit consent of the copyright holders. Peach Fuzzer is a registered trademark of Peach Fuzzer, LLC. Peach Fuzzer contains Patent Pending technologies. While every precaution has been taken in the preparation of this book, the publisher and authors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. Peach Fuzzer, LLC 1122 E Pike St Suite 1064 Seattle, WA
3 1. IPSECv6 Peach Pit Data Sheet Peach Pit: IPSECv6 Target: Client (AH and ESP) Supported Platforms: Windows, Linux, OS X Internet Protocol Security version 6, (IPsecv6) is a protocol suite for securing Internet Protocol (IP) communications. IPsecv6 operates at Internet layer (layer 3), and provides security for almost all protocols in the TCP/IP suite. IPsec provides two choices of security service: Authentication Header (AH), which essentially allows authentication of the sender of data, and Encapsulating Security Payload (ESP), which supports both authentication of the sender and encryption of data as well. IPsec helps provide in-depth defense against: Network-based attacks from untrusted computers that can result in denial-of-service of applications, services, or the network Data corruption Data theft User-credential theft Administrative control of servers, other computers, and the network. IPsecv6 has two modes of operation: Transport mode is used in host-to-host communications and encrypts the payload of the IP packets in the communication. Tunnel mode is used in host-to-network communications (remote user access), host-to-host communications (private chats), and netowrk-to-network communications (creating Virtual Private Networks). Tunnel mode encrypts the entire IP packet, header and payload, and inserts the encrypted packet into a new packet with a new IP header Specifications Specification RFC2403 RFC2404 RFC2405 Title The Use of HMAC-MD5-96 within ESP and AH The Use of HMAC-SHA-1-96 within ESP and AH The ESP DES-CBC Cipher Algorithm With Explicit IV 2
4 Specification RFC2410 RFC2451 RFC2857 RFC4302 RFC4303 Title The NULL Encryption Algorithm and Its Use With IPsec The ESP CBC-Mode Cipher Algorithms The Use of HMAC-RIPEMD within ESP and AH IP Authentication Header IP Encapsulating Security Payload 1.2. Use Cases Messages Authentication Header (AH) Encapsulating Security Payload (ESP) Specification RFC4302 RFC4303 Transport Mode Processing RFC Section 3.1.1, RFC Section Tunnel Mode Processing RFC Section 3.1.2, RFC Section Separate Confidentiality and Integrity Algorithms RFC ICV HMAC-MD5-96 ICV HMAC-SHA-1-96 ICV HMAC-RIPEMD DES-CBC Cipher Encryption Null Encryption RFC2403 RFC2404 RFC2857 RFC2405, RFC2451 RFC2410 3
5 2. Target Authentication Header (AH) Configuration An IPsec target configured for manual keying using the keys defined in the configuration file is required. Both a UDP and a TCP listener are required to run all the tests. The networking tool socat can be used as a listener. IP-tools on Linux can be used Required Pit Configuration Changes Target IPv4 Address (TargetIPv4) IPv4 address of the target host machine (used for encapsulating IPv4 in IPv6). The default value is For information on obtaining the IP v4 address, see Retrieving Machine Information. Target IPv6 Address (TargetIPv6) IPv6 address of the target host machine. Default value is ::1. For more information, see Retrieving Machine Information. Target MAC Address (TargetMAC) Hardware address of the network interface on the target machine. The default value is For information about obtaining the MAC address, see Retrieving Machine Information. Target Port (TargetPort) UDPv6 and/or TCPv6 port number of the target host machine. The Target Port is the packet destination. The default value is Source IPv4 Address (SourceIPv4) IPv4 address of the machine running Peach (used for encapsulating IPv4 in IPv6). Default value is For more information, see Retrieving Machine Information. Source IPv6 Address (SourceIPv6) IPv6 address of the machine running Peach. Default value is ::1. For more information, see Retrieving Machine Information. Source MAC Address (SourceMAC) Hardware address of the network interface on the machine running Peach (client). Default value is For more information, see Retrieving Machine Information. 4
6 Source Port (SourcePort) UDP and/or TCP port number of the local machine. The Source Port sends the network packets. The default value is Encryption Algorithm (EncryptionAlg) Advanced option. Use the default value, Aes128. This parameter specifies the algorithm used to encrypt packets. Encryption Key (CryptoKey) Advanced option. Use the default value, This parameter specifies the shared key used to encrypt packets. Initialization Vector (IV) Advanced option. Use the default value, baae9ef59ff1ee bd91da50ed. Initialization vector used with the encryption algorithm Optional Pit Configuration Changes IPsec Mode (Mode) Processing mode for IPsec is either Tunnel or Transport. Transport mode encrypts only the IP packet payload. Tunnel mode encrypts the entire IP packet, header and payload.+ The default value is Transport. HMAC Hash Algorithm (HashAlg) Hashing algorithm used to provide data integrity. The default value is HMACSHA1. Available hashing algorithm choices include the following: HMACSHA1, HMACMD5, HMACRIPEMD160, HMACSHA256, HMACSHA384, HMACSHA512, and MACTripleDES. HMAC Key (AuthKey) Shared authentication key used for HMAC hashing. The selected hashing algorithm determines the length of this key. The default value is Security Parameters Index (SPI) An arbitrary 32-bit value that, in combination with the destination IP address and security protocol (AH), uniquely identifies the Security Association for this datagram. The default value is 201. Timeout (Timeout) Duration, in milliseconds, to wait for incoming data. A value of -1 extends the duration to infinity. During fuzzing, a timeout failure causes the fuzzer to skip to the next test case. 5
7 3. Target Encapsulating Security Payload (ESP) Configuration An IPsec target configured for manual keying using the keys defined in the configuration file is required. Both a UDP and an TCP listener are required to run all the tests. The networking tool socat can be used as a listener. IP-tools on Linux can be used Required Pit Configuration Changes Target IPv4 Address (TargetIPv4) IPv4 address of the target host machine (used for encapsulating IPv4 in IPv6). The default value is For information on obtaining the IP v4 address, see Retrieving Machine Information. Target IPv6 Address (TargetIPv6) IPv6 address of the target host machine. Default value is ::1. For more information, see Retrieving Machine Information. Target MAC Address (TargetMAC) Hardware address of the network interface on the target machine. The default value is For information about obtaining the MAC address, see Retrieving Machine Information. Target Port (TargetPort) UDPv6 and/or TCPv6 port number of the target host machine. The Target Port is the packet destination. The default value is Source IPv4 Address (SourceIPv4) IPv4 address of the machine running Peach (used for encapsulating IPv4 in IPv6). Default value is For more information, see Retrieving Machine Information. Source IPv6 Address (SourceIPv6) IPv6 address of the machine running Peach. Default value is ::1. For more information, see Retrieving Machine Information. Source MAC Address (SourceMAC) Hardware address of the network interface on the local machine running Peach. Default value is For more information, see Retrieving Machine Information. 6
8 Source Port (SourcePort) UDP and/or TCP port number of the local machine. The Source Port sends the network packets. The default value is Encryption Algorithm (EncryptionAlg) Advanced option. Use the default value, Aes128. This parameter specifies the algorithm used to encrypt packets. Encryption Key (CryptoKey) Advanced option. Use the default hexadecimal value, This parameter specifies the shared key used to encrypt packets. For AES, this key must be 16 bytes long. For 3DES, this key must be 8 bytes long. Initialization Vector (IV) Advanced option. Use the default value, baae9ef59ff1ee bd91da50ed. Initialization vector used with the encryption algorithm Optional Pit Configuration Changes IPsec Mode (Mode) Processing mode for IPsec; can either be Tunnel or Transport. Transport mode encrypts only the IP packet payload. Tunnel mode encrypts the entire IP packet, header and payload.+ The default value is Transport. HMAC Hash Algorithm (HashAlg) Hashing algorithm used to provide data integrity. The default value is HMACSHA1. Available hashing algorithm choices include the following: HMACSHA1, HMACMD5, HMACRIPEMD160, HMACSHA256, HMACSHA384, HMACSHA512, and MACTripleDES. HMAC Key (AuthKey) Shared authentication key used for HMAC hashing. The selected hashing algorithm determines the length of this key. The default value is Security Parameters Index (SPI) An arbitrary 32-bit value assigned to the local machine. In combination with the destination IP address and security protocol (ESP), SPI uniquely identifies the Security Association for this datagram. The default value is 201. Timeout (Timeout) Duration, in milliseconds, to wait for incoming data. A value of -1 extends the duration to infinity. During fuzzing, a timeout failure causes the fuzzer to skip to the next test case. 7
9 4. Retrieving Machine Information Interface names, hardware addresses, and IP addresses are used when fuzzing network protocols. Windows, Linux, and OS X each have their idiosynchrasies in reporting machine configuration details. This appendix provides an example of retrieving the machine information Interface name, MAC address, and IP v4 and v6 addresses from each of the operating systems Windows In Windows, ipconfig runs from the command line interface. Using the all parameter, ipconfig /all, displays the pieces of information. The following illustration calls out instances of the Interface name, MAC address, and IP addresses. 8
10 Figure 1. ipconfig //all command Interface Name The interface name is part of the main entry on the line not indented and immediately follows the word "adapter". The previous illustration identifies two interfaces "Local Area Conection 2" and "Ethernet". The Interface name does not include the asterisk (*). You need to remove the asterisk, if present, when specifying the interface name to Peach. MAC Address The MAC address, labeled the "Physical Address" by ipconfig, is the address of the hardware interface. The entry is just a few lines into the detail, as shown in the previous illustration. 9
11 IPv4 Address The IP v4 address is the value labeled "IPv4 Address". The previous illustration calls out the IP v4 Address of the Ethernet interface. IPv6 Address The IP v6 address is the value labeled "Link-local IPv6 Address". The previous illustration calls out the IP v6 Address of the Ethernet interface. You can confirm the correctness of an IP v4 or IP v6 address by using ping or ping -6 followed by the appropriate IP address. For IP v6, the value fe80 in the leftmost block of hex digits indicates a link local address (i.e. a local network) Linux In Linux, ifconfig provides all of the needed information. The main entries reported by ifconfig identify each addapter by name, type, and other attributes. The following illustration calls out instances of the Interface name, MAC address, and IP addresses. 10
12 Figure 2. Linux ifconfig command Interface Name The interface name is in leftmost column. Additional details are provided on indented lines. The previous illustration calls out the "eth0" and "lo" interfaces. The MAC address The MAC address is labeled with "HWaddr", and is located on the first line of the interface entry. The previous illustration calls out the MAC address of the "eth0" interface. IPv4 Address The IP v4 address is labeled with "inet addr", and is located in one of the first detail lines. The previous illustration calls out the IP v4 address of the "eth0" interface. 11
13 IPv6 Address The IP v6 address is labeled with "inet6 addr", and is follows the IP v4 address in the listing detail. The previous illustration calls out the IP v6 address of the "eth0" interface. You can confirm the correctness of an IP v4 or IP v6 address by using ping or ping6 followed by the appropriate IP address. For IP v6, the value fe80 in the leftmost block of hex digits indicates a link local address (i.e. a local network) OS X In OS X, ifconfig provides all of the needed information. The main entries reported by ifconfig identify each addapter by name, type, and other attributes. The following illustration calls out instances of the Interface name, MAC address, and IP addresses. Figure 3. OS X ifconfig command Interface Name The interface name is in leftmost column. Additional details are provided on indented lines. The previous illustration calls out the "en0" and "en1" interfaces. MAC Address The MAC address is labeled with "ether", and is located on the first line of the interface entry. The 12
14 previous illustration calls out the MAC address of the "en0" and "en1" interfaces. IPv4 Address The IP v4 address is labeled with "inet ", and is located further down in the interface details. The previous illustration calls out the IP v4 address of the "en1" interface. IPv6 Address The IP v6 address is labeled with "inet6 ", and is located further down in the interface details. The previous illustration calls out the IP v4 address of the "en1" interface. You can confirm the correctness of an IP v4 or IP v6 address by using ping or ping6 followed by the appropriate IP address. For IP v6, the value fe80 in the leftmost block of hex digits indicates a link local address (i.e. a local network). 13
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