Buffer_Overflow_PoC_C_Linux | purposefully vulnerable TCP C program | Hacking library
kandi X-RAY | Buffer_Overflow_PoC_C_Linux Summary
kandi X-RAY | Buffer_Overflow_PoC_C_Linux Summary
This tutorial started as a simple attempt to take notes and follow my curiosity on C programming, Assembly and Buffer Overflows work. Don’t take anything here as gospel because the content was written by a high-school drop-out without any formal computer science background. If you find something wildly wrong then let me know. From what I can tell, overall this work is directionally accurate. The PoC and much of the content is compiled and inspired from various CTFs, Online Videos, UPENN, Renseller, Blackhat presentations, exploit researchers on exploit-db and more. This entire paper looks at security from the perspective of someone who needs to learn from the ground up. All the tutorials and blogs on Buffer Overflows either show a basic “Input data here” C program or use well known vendor products. There little mention on the C programming language or the memory protections within. There is little mention of the pain of taking pre-compiled binaries that you did not write and attempting of fuzz it, reverse engineer it and understand it before throwing your garbage at the program. Most tutorials dive straight into intimidating debuggers GUIs without starting in a simple GDB screen never forcing the user to think about what they need to see. All the blogs, tutorials and training tells you to disable modern memory and stack protections without explaining the critically of them and the difficulty of developing a successful exploit in the modern world. And there is little interdisciplinary mention of implementing the protective and detective technology that relates to the buffer overflow. All this leaves the technology new-comer wildly unprepared or the least blissfully ignorant, including myself. In the unlikely chance that someone starting their career stumbles upon this paper online, I hope you find that it is historically as useless as the papers and tutorials that came before it. I hope it inspires you to learn more and build upon and correct it. There is no money involved here, no corporate sponsorship, no edu homework or anything like that. Just someone who loves learning who wrote it all down. If your foolish or bored enough to go any further, what will you find?. *Basics of C Socket programming *C Socket program code w/ Inline comments on how to write a Socket program in C *Basic fuzzer development in Python *Basic of reverse engineering pre-compiled Binaries found online with NSA GHIDRA *Basics of using GBD and EDB debuggers *Intro material on x86 Assembly and Memory *Crashing the Stack (Buffer Overflow PoC) *Static Analysis of Insecure Functions in C *Basics on the Mitigations to Buffer Overflows *Basics on Bypassing Buffer Overflow Mitigations *Basics on Detecting Buffer Overflows and Post exploit activity.
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QUESTION
I am learning SwiftUI on 100 Days of SwiftUI on Hacking with Swift. My Xcode SwiftUI Preview crashes and I don't know why. Running on Simulator works though. I tried to completely reinstall Xcode (deleting the app, preferences, libraries etc), but it still doesn't work. I am using Xcode 13.2.1 on iMac 2019 i9 9900K 64GB RAM.
Here is the problem details. (cannot contain full report because of 30000 word limit)
...ANSWER
Answered 2022-Mar-29 at 10:26Solved by adding ZStack in Preview struct solved it.. This is maybe a bug. Solution
QUESTION
I have source (src) image(s) I wish to align to a destination (dst) image using an Affine Transformation whilst retaining the full extent of both images during alignment (even the non-overlapping areas).
I am already able to calculate the Affine Transformation rotation and offset matrix, which I feed to scipy.ndimage.interpolate.affine_transform to recover the dst-aligned src image.
The problem is that, when the images are not fuly overlapping, the resultant image is cropped to only the common footprint of the two images. What I need is the full extent of both images, placed on the same pixel coordinate system. This question is almost a duplicate of this one - and the excellent answer and repository there provides this functionality for OpenCV transformations. I unfortunately need this for scipy's implementation.
Much too late, after repeatedly hitting a brick wall trying to translate the above question's answer to scipy, I came across this issue and subsequently followed to this question. The latter question did give some insight into the wonderful world of scipy's affine transformation, but I have as yet been unable to crack my particular needs.
The transformations from src to dst can have translations and rotation. I can get translations only working (an example is shown below) and I can get rotations only working (largely hacking around the below and taking inspiration from the use of the reshape argument in scipy.ndimage.interpolation.rotate). However, I am getting thoroughly lost combining the two. I have tried to calculate what should be the correct offset (see this question's answers again), but I can't get it working in all scenarios.
Translation-only working example of padded affine transformation, which follows largely this repo, explained in this answer:
...ANSWER
Answered 2022-Mar-22 at 16:44If you have two images that are similar (or the same) and you want to align them, you can do it using both functions rotate and shift :
QUESTION
I'm currently using isort --profile=black --line-length=79 as a linter in my project for python files.
This produces the Vertical Hanging Indent (mode 3 in isort's documentation kind of output:
...ANSWER
Answered 2022-Mar-07 at 06:44You should use the --force-grid-wrap 2 flag in the CLI or set in the settings file like pyproject.toml option force_grid_wrap = 2. This would force isort to produce multiline output for 2 or more imports, regardless of line length. More info about this option
QUESTION
I have a little library where I can define integer types. These are intended for type-safe indexing into arrays and strings in the kind of algorithms I often write. For example, I can use it to define an offset type, Offset and an index type, Idx such that you can get an Offset by subtracting two Idx, you can get Idx by adding or subtracting Offset, but you cannot for example multiple or add Idx.
ANSWER
Answered 2022-Feb-10 at 05:54No, you can't.
By definition of the orphan rules:
Given
impl Trait for T0, animplis valid only if at least one of the following is true:
- Trait is a local trait
- All of
- At least one of the types
T0..=Tnmust be a local type. LetTibe the first such type.- No uncovered type parameters
P1..=Pnmay appear inT0..Ti(excludingTi)Only the appearance of uncovered type parameters is restricted. Note that for the purposes of coherence, fundamental types are special. The T in Box is not considered covered, and Box is considered local.
Local traitA
traitwhich was defined in the current crate. A trait definition is local or not independent of applied type arguments. Giventrait Foo,Foois always local, regardless of the types substituted forTandU.
Local typeA
struct,enum, orunionwhich was defined in the current crate. This is not affected by applied type arguments.struct Foois considered local, butVecis not.LocalTypeis local. Type aliases do not affect locality.
As neither Index nor Range nor Vec are local, and Range is not a fundamental type, you cannot impl Index<...>> for Vec, no matter what you put in the place of the ....
The reason for these rules is that nothing prevents Range or Vec from implementing impl Index> for Vec. Such impl does not exist, and probably never will, but the rules are the same among all types, and in the general case this definitely can happen.
You cannot overload the range operator either - it always creates a Range (or RangeInclusive, RangeFull, etc.).
The only solution I can think about is to create a newtype wrapper for Vec, as suggested in the comments.
If you want your vector to return a wrapped slice, you can use a bit of unsafe code:
QUESTION
I am not a coder by trade, but am working on hacking together an image carousel for our website. I've gotten everything to work except for this last weird problem I am having with spacing. In the attached image, you'll see there is too much spacing between the screenshot and the next-image button to the right of it.
Here is the code (apologies in advance, it is truly terrible):
...ANSWER
Answered 2022-Feb-01 at 19:44Replacing justify-content: space-between with justify-content: center in #p-10-s-i-s-image-container will fix that.
QUESTION
I think the question is quite obvious. The I have tried so far:
...ANSWER
Answered 2022-Feb-01 at 12:18You can use std::bind_front to bind this to &test::member and pass it to jthread:
QUESTION
I want to change the background color of a SpTextInputFieldPresenter
e.g. to provide a visual feedback of the input, I want to react to whenTextChangedDo: and change the background color of the field to show if the input is correct or wrong. I know this is not the best for everybody, but I still want to try it.
How can I do without hacking?
ANSWER
Answered 2022-Jan-28 at 14:01Spec previews the use of styles to change (up to a point) how a component looks.
Styles are added to an application (an instance of SpApplication or child of it) and can be used by any presenter that is part of the application.
Styles can be seen as CSS stylesheets, and in the case of Gtk they actually are CSS stylesheets, but in the case of Morphic backend they have a complete different implementation (you can see all properties you can define in the SpPropertyStyle hierarchy.
The following code will show how to
- declare styles (in a scripting way, in a production scenario styles would be likely defined in a configuration for the application).
- use them by adding or removing them.
QUESTION
Let's say I have the following Spark frame:
...ANSWER
Answered 2022-Jan-31 at 13:47Group by time window '1 day' + UserName to count then group by window frame and pivot user names:
QUESTION
I have a playbook that performs some tasks on a GKE cluster. It works, but every now and again, the cluster will go into a "RECONCILING" state (we don't know why yet).
I want to add a task to wait for the cluster state to be in "RUNNING" before proceeding with the other tasks, in order to avoid tasks failing
This works:
...ANSWER
Answered 2022-Jan-29 at 11:28You've got it correct almost. The only thing is that the selectattr and map query is returning a list with 1 item, i.e.
QUESTION
Consider the following stream:
...ANSWER
Answered 2022-Jan-25 at 22:11If I understand the problem right, I would proceed like this.
First we isolate the source stream. Consider that we use the share operator to make sure that the source$ stream is shared by the other Observables we are going to create later on starting from source$.
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