libmem | Advanced Game Hacking Library for C/C++ , Rust and Python | Cybersecurity library

by rdbo C Version: 5.0.0rc6 License: AGPL-3.0

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | libmem Summary

libmem is a C library typically used in Security, Cybersecurity applications. libmem has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

Include libmem/libmem.h (C/C++) or libmem/libmem.hpp (C++) in your project. Compile libmem/libmem.c along with your project.

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Support

libmem has a low active ecosystem.

It has 411 star(s) with 70 fork(s). There are 11 watchers for this library.

There were 2 major release(s) in the last 6 months.

There are 14 open issues and 113 have been closed. On average issues are closed in 8 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of libmem is 5.0.0rc6

Quality

libmem has 0 bugs and 0 code smells.

Security

libmem has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

libmem code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

libmem is licensed under the AGPL-3.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

libmem releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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libmem Examples and Code Snippets

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Community Discussions

Trending Discussions on libmem

Cannot return correct memory address from a shared lib in C

Remote mmap syscall using ptrace (Linux, C)

QUESTION

Cannot return correct memory address from a shared lib in C

Asked 2021-May-11 at 21:47

I have been trying to implement a small simulation to understand memory allocation of malloc(). I created a shared library called mem.c. I am linking the library to the main but cannot pass the correct address of the simulated "heap". Heap is created by a malloc() call in the shared library.

Address in the shared library: 0x55ddaff662a0 Address in the main: 0xffffffffaff662a0

Only last 4 bytes seem to be correct. Rest is set to 0xf.

However, when I #include "mem.c" in the main it works correctly. How can I achieve the same result without including the mem.c. I am trying to solve this without including mem.c or mem.h. I create shared library as this:

...

ANSWER

Answered 2021-May-11 at 21:47

From your comments

I am trying to implement without using #include mem.h or mem.c.

Then you must provide by other means a prototype for the function you're calling. Without an explicit function prototype, following the tradition of K&R and then later ANSI C, undeclared functions are assumed to return an int and take parameters of type int.

EDIT: Essentially you need to write what'd you normally find in a header, somewhere before you make first use of the function. Or of it's a function pointer you need an appropriate variable to store the function pointer.

For example to declare a function that returns an untyped pointer, and an arbitrary, unspecified number of arguments you'd write

Source https://stackoverflow.com/questions/67493521

QUESTION

Remote mmap syscall using ptrace (Linux, C)

Asked 2020-Aug-14 at 16:18

I've been stuck with this problem for some days, and still haven't manage to fix it. Basically, I want to do a remote syscall from an attacker program to the target. But before showing the code, I think it'd be a good idea to present my thought process, as the problem could be anything at this point. I am doing this remote syscall through the following steps:

Parse /proc//maps file to get an executable region.
Store the data at the executable region and write a custom buffer that does the syscall to it.
Store the old registers and setup new ones to make the syscall
Write the new registers and continue the execution
After the syscall, the target program will break, which would allow me to get the output of mmap, set back the old registers and therefore, restore the old execution flow.

I am using my memory lib to parse the mmap files, get process id and process information, etc. As far as I am concerned, it is working properly. In any case, here's the source: https://github.com/rdbo/libmem

And the code I am using to do the call:

...

ANSWER

Answered 2020-Aug-14 at 16:18

Turns out the problem was that I was reading/writing the memory using process_vm_read and process_vm_write. I got it to work by changing the read/write method to ptrace PEEK/POKE data. Fixed code (included on my memory lib):

Source https://stackoverflow.com/questions/63350377

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install libmem

You can download it from GitHub.

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For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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