74 lines
3.0 KiB
Plaintext
74 lines
3.0 KiB
Plaintext
UNIX Assembly Components for Proof of Concept Codes
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Introduction
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This project contains a set of assembly components for proof of concept codes
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on different operating systems and architectures. These components were
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carefully designed and implemented for maximum reliability, following strict
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coding standards and requirements, such as system call invocation standards,
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position independent, register independent and zero free code. A special
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attention was put on code length when designing and implementing them,
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resulting in the most reliable and shortest codes for such purpose available
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today.
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Code length
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Operating System bndsockcode cntsockcode fndsockcode
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and Architecture
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AIX Power 264 204 220
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BSD x86 73 64 60
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Linux x86 78 71 62
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Linux Power/CBEA 223 183 171
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Mac OS X x86 74 65 61
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Solaris x86 95 91 86
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Code functionality
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These components are differentiated by their actual functionality and impact
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of practical application. Here follows a brief description of the
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functionality of some of them.
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Network server code (bndsockcode)
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This code creates a listening TCP socket on a port defined at BNDSOCKPORT
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offset of bndsockcode routine (its value is set to 1234 by default). Upon
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accepting a connection, it duplicates the socket descriptor of the remote TCP
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endpoint to the process standard descriptors (stdin, stdout and stderr) and
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executes an interactive shell.
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Network connect code (cntsockcode)
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This code establishes a TCP connection with a remote IP address and port
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defined at CNTSOCKADDR and CNTSOCKPORT offsets of cntsockcode routine (its
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values are set to 127.0.0.1 and 1234 by default respectively). Upon
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establishing a connection, it duplicates the socket descriptor of the remote
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TCP endpoint to the process standard descriptors (stdin, stdout and stderr)
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and executes an interactive shell.
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Find socket code (fndsockcode)
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This code walks the process descriptor table in a search for a socket
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descriptor of the remote TCP endpoint identified by a port number defined at
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FNDSOCKPORT offset of the fndsockcode. In a case such a endpoint is located,
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the loop is terminated and found socket descriptor is duplicated on the
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process standard descriptors (stdin, stdout and stderr).
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Prior to executing the fndsockcode, a client software should establish a TCP
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connection with a process in which context the code is to be executed.
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Appropriate setting of the code data at FNDSOCKPORT offset of fndsockcode
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should be also made to assure proper identification of the client's
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connection.
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Get the latest development version
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The latest development version is available in our Subversion repository. Get
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it with the following command, which requires Subversion.
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svn co http://risesecurity.org/svn/unixasm/trunk
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