Capture the Flag (CTF) are information security challenges. They are fun, but they also provide a opportunity to practise for real-world security challenges.
In this talk we present the concept of CTF. We focus on some tools used by our team, which can also be used to solve real-world problems.
This document summarizes the building of a Capture The Flag (CTF) competition held in 2012. Each competing team was given a virtual machine running custom vulnerable services that they had to identify, defend against other teams, and exploit vulnerabilities in other team's machines. A monitoring system tracked network traffic to analyze attacks. Points were awarded for defense, offense, and advisories on vulnerabilities. In the end, no standalone systems were compromised, but the virtual machines saw active exploitation of some vulnerabilities. Results and advisories were published after the competition.
This document provides information about x86 architecture including registers, flags, modes, common instructions, Intel and AT&T syntax, system calls, examples, and references. It defines the purpose of key registers like EAX, EBX, ESP and flags. It explains real and protect modes and differences between Intel and AT&T syntax. Examples demonstrate how to write assembly code and call system calls. References provided can be used to learn more about x86 assembly programming.
1. The document discusses format string vulnerabilities and how to exploit them. Format strings allow printing variable values without specifying the type or number of parameters, allowing arbitrary memory reads and writes.
2. Examples show how to use format strings with the %n specifier to write specific values to arbitrary memory addresses by calculating offsets on the stack.
3. Exploiting format strings allows operations like GOT hijacking, leaking memory, and writing variable values to gain arbitrary code execution on vulnerable programs. The document provides resources for practicing these techniques.
This document provides an introduction to Python programming including installation, basic syntax, data types, control flow, modules, sockets, structs, pwntools, vulnerabilities, practice problems, and references for further learning. It covers topics such as printing, taking input, lists, arithmetic, conditional statements, loops, functions, importing modules, sending/receiving data over sockets, packing/unpacking integers, using pwntools, and exploiting vulnerabilities like pickle injection. Example code is provided throughout to demonstrate the concepts.
Muhammad Abrar Istiadi - How to hack #idsecconf2016 Online CTFidsecconf
Dokumen tersebut memberikan panduan untuk menyelesaikan tantangan CTF bertema keamanan siber yang diselenggarakan pada IDSECCONF 2016. Tantangan tersebut terdiri dari 9 tantangan yang berkaitan dengan eksploitasi biner, kriptografi, pemrograman, reverse engineering, dan aplikasi web. Dokumen tersebut menjelaskan analisis dan solusi yang dilakukan untuk menyelesaikan tantangan-tantangan tersebut dengan menggunakan berbagai teknik dan alat
Capture the Flag (CTF) are information security challenges. They are fun, but they also provide a opportunity to practise for real-world security challenges.
In this talk we present the concept of CTF. We focus on some tools used by our team, which can also be used to solve real-world problems.
This document summarizes the building of a Capture The Flag (CTF) competition held in 2012. Each competing team was given a virtual machine running custom vulnerable services that they had to identify, defend against other teams, and exploit vulnerabilities in other team's machines. A monitoring system tracked network traffic to analyze attacks. Points were awarded for defense, offense, and advisories on vulnerabilities. In the end, no standalone systems were compromised, but the virtual machines saw active exploitation of some vulnerabilities. Results and advisories were published after the competition.
This document provides information about x86 architecture including registers, flags, modes, common instructions, Intel and AT&T syntax, system calls, examples, and references. It defines the purpose of key registers like EAX, EBX, ESP and flags. It explains real and protect modes and differences between Intel and AT&T syntax. Examples demonstrate how to write assembly code and call system calls. References provided can be used to learn more about x86 assembly programming.
1. The document discusses format string vulnerabilities and how to exploit them. Format strings allow printing variable values without specifying the type or number of parameters, allowing arbitrary memory reads and writes.
2. Examples show how to use format strings with the %n specifier to write specific values to arbitrary memory addresses by calculating offsets on the stack.
3. Exploiting format strings allows operations like GOT hijacking, leaking memory, and writing variable values to gain arbitrary code execution on vulnerable programs. The document provides resources for practicing these techniques.
This document provides an introduction to Python programming including installation, basic syntax, data types, control flow, modules, sockets, structs, pwntools, vulnerabilities, practice problems, and references for further learning. It covers topics such as printing, taking input, lists, arithmetic, conditional statements, loops, functions, importing modules, sending/receiving data over sockets, packing/unpacking integers, using pwntools, and exploiting vulnerabilities like pickle injection. Example code is provided throughout to demonstrate the concepts.
Muhammad Abrar Istiadi - How to hack #idsecconf2016 Online CTFidsecconf
Dokumen tersebut memberikan panduan untuk menyelesaikan tantangan CTF bertema keamanan siber yang diselenggarakan pada IDSECCONF 2016. Tantangan tersebut terdiri dari 9 tantangan yang berkaitan dengan eksploitasi biner, kriptografi, pemrograman, reverse engineering, dan aplikasi web. Dokumen tersebut menjelaskan analisis dan solusi yang dilakukan untuk menyelesaikan tantangan-tantangan tersebut dengan menggunakan berbagai teknik dan alat
The document summarizes the author's experience playing a capture the flag (CTF) competition called the 44Con CTF. It describes recon activities like scanning services to identify vulnerabilities. Several services are found to have exploitable issues, including a pastie service with SQL injection, a mail server with remote code execution, and an authentication service with a stack buffer overflow. The author is able to exploit these issues to steal flags, gain a remote shell, and eventually escalate privileges to root through service restart hijacking and a mail service vulnerability. Overall it provides a play-by-play of the reconnaissance and exploitation steps taken during the CTF.
CTF (Capture the Flag) competitions involve two main types: Jeopardy-style and Attack-Defense. Jeopardy involves challenges in areas like pwnning, reverse engineering, web hacking, and cryptography, while Attack-Defense pits teams against each other on a network. To succeed in CTFs requires skills like exploiting, cryptography, and scripting as well as teamwork and problem-solving abilities. Recommended resources for learning include online CTF platforms, past competition archives, write-ups from other teams, and wargaming sites.
Ever tried to send an encrypted email? Who knows what all this "certificate warnings" in Firefox/Chrome are about? Do you know when your WiFi is secure, and when not?
Security and usability are two parameters which are often played out against each other when it comes to designing and developing software. In my opinion that should not be the case.
A pen testing lab is a controlled environment used to study and practice penetration testing techniques. It allows practitioners to recreate real-world attack scenarios in a safe environment. An effective pen testing lab requires at least two computers - one set up as an attacker machine with penetration testing tools, and another as a target machine with vulnerable software. It also requires a network connecting the two. Labs can be set up physically or virtually. Practicing in a lab helps improve skills and prepare for real-world assessments and competitions like Capture the Flag events.
1. The document discusses the history and concepts of internet governance from the early ARPANET days to the present. It covers topics such as technical standards, naming architecture, numbering resources, multistakeholder model, and the IANA transition.
2. Cybersecurity concepts are also summarized, including the goals of information security around confidentiality, integrity and availability. Frameworks for cybersecurity management and defense like ISO 27001 are outlined.
3. Issues related to internet governance and cybersecurity are still evolving through initiatives at the UN and other multilateral organizations to address topics like critical internet resources, capacity building, and access.
The document summarizes the author's experience playing a capture the flag (CTF) competition called the 44Con CTF. It describes recon activities like scanning services to identify vulnerabilities. Several services are found to have exploitable issues, including a pastie service with SQL injection, a mail server with remote code execution, and an authentication service with a stack buffer overflow. The author is able to exploit these issues to steal flags, gain a remote shell, and eventually escalate privileges to root through service restart hijacking and a mail service vulnerability. Overall it provides a play-by-play of the reconnaissance and exploitation steps taken during the CTF.
CTF (Capture the Flag) competitions involve two main types: Jeopardy-style and Attack-Defense. Jeopardy involves challenges in areas like pwnning, reverse engineering, web hacking, and cryptography, while Attack-Defense pits teams against each other on a network. To succeed in CTFs requires skills like exploiting, cryptography, and scripting as well as teamwork and problem-solving abilities. Recommended resources for learning include online CTF platforms, past competition archives, write-ups from other teams, and wargaming sites.
Ever tried to send an encrypted email? Who knows what all this "certificate warnings" in Firefox/Chrome are about? Do you know when your WiFi is secure, and when not?
Security and usability are two parameters which are often played out against each other when it comes to designing and developing software. In my opinion that should not be the case.
A pen testing lab is a controlled environment used to study and practice penetration testing techniques. It allows practitioners to recreate real-world attack scenarios in a safe environment. An effective pen testing lab requires at least two computers - one set up as an attacker machine with penetration testing tools, and another as a target machine with vulnerable software. It also requires a network connecting the two. Labs can be set up physically or virtually. Practicing in a lab helps improve skills and prepare for real-world assessments and competitions like Capture the Flag events.
1. The document discusses the history and concepts of internet governance from the early ARPANET days to the present. It covers topics such as technical standards, naming architecture, numbering resources, multistakeholder model, and the IANA transition.
2. Cybersecurity concepts are also summarized, including the goals of information security around confidentiality, integrity and availability. Frameworks for cybersecurity management and defense like ISO 27001 are outlined.
3. Issues related to internet governance and cybersecurity are still evolving through initiatives at the UN and other multilateral organizations to address topics like critical internet resources, capacity building, and access.
8. ROP
給你固定的 instructions 選項
組合 instructions
來合成三個 system call
open -> read -> write
open “/home/rop/flag”
open return file fd
read file fd to buffer
write buffer to STDOUT
34. Demo Time
在 local 使用 xinetd 在 5566 port 架設同樣的環境
nc localhost 5566
觀察 binary :
strings , objdump
使用 IDA PRO decompiler program
撰寫 exploit
backdoor
binary patch
demo video : https://www.youtube.com/watch?v=XPlxIYUm_3M