Tutorial

Vulnhub - Breach 3 boot2root CTF walkthrough 10 min read

The third boot2root system in the Breach series is an intermediate challenge. This time the VM will automatically acquire an IP address via DHCP. First, let’s identify the target system. With …

Vulnhub - Breach 2.1 boot2root CTF walkthrough 8 min read

Breach 2.1 is meant to be beginner to intermediate boot2root/CTF challenge. The VM is configured with a static IP address (192.168.110.151) so you will need to configure your host-only adaptor to this …

Vulnhub - Breach 1 boot2root CTF walkthrough 10 min read

Breach 1.0 is meant to be beginner to intermediate boot2root/CTF challenge. The VM is configured with a static IP address (192.168.110.140) so you will need to configure your host-only adaptor to this …

Exploit Exercises - Protostar - Final levels 21 min read

Exploit-Exercises: Protostar For this level we have got a binary listening on port 2995. Let’s find out what this binary is up to. 0x08049833 <main+0>: push %ebp 0x08049834 …

Exploit Exercises - Protostar - Heap levels 15 min read

Exploit-Exercises: Protostar For this scenario we need to run the winner() function. To get a better idea about the binary a look at the assembly helps. 0x08048492 <main+6>: sub $0x20,%esp …

Exploit Exercises - Protostar - Network levels 10 min read

Exploit-Exercises: Protostar For this exercise we have got a service listening on port 2999. Let’s connect and see what it does. user@protostar:/opt/protostar/bin$ telnet 127.0.0.1 2999 …

Exploit Exercises - Protostar - Format String levels 7 min read

Exploit-Exercises: Protostar First of all, we take a look at the disassembly. ... 0x08048431 <main+6>: sub $0x10,%esp 0x08048434 <main+9>: mov 0xc(%ebp),%eax ; load pointer to the address …

Exploit Exercises - Protostar - Stack levels 12 min read

Exploit-Exercises: Protostar For this scenario we need to overwrite the stack variable $modified. To get a better idea about the binary a look at the assembly helps. 0x080483f4 <main+0>: push …

Aviosoft Digital TV Player Professional 1.0 Stack Buffer Overflow 4 min read

Historical Content (2014): This article demonstrates classic stack-based buffer overflow exploitation on Windows XP SP3. Modern Windows systems include mitigations such as ASLR, DEP/NX, and CFG that …