rizinorg/cutter

Cutter GUI trimms shell code to whole bytes (might discard last nibble)

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#2,831 opened on Nov 22, 2021

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good first issue

Description

Environment information

  • Operating System: linuxmint 20.2
  • Cutter version: 2.0.3
  • File format: any
  • Arch: N/A
  • Type: N/A

Describe the bug Cutter open shell code gui trimms shell code to whole bytes (might discard 1 nibble)

To Reproduce Steps to reproduce the behavior:

  1. Launch Cutter
  2. Enter odd number of nibbles
  3. Click ok
  4. See information loss

Expected behavior

  1. Fill the last lonely nibble with a 0-nibble so no information is discarded.
  2. When no shell code is entered proceed with empty input OR grey out the OK-button.

Screenshots image

Contributor guide

Tech stack
cpp
Domain
desktopsecurity
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
85
Research direction
Investigate the shell code input handling in Cutter's GUI code, likely in files related to dialogs or shellcode entry (e.g., `src/dialogs/ShellcodeDialog.cpp` or similar). The bug is that odd nibble counts are truncated; expected behavior is to pad with a zero nibble. Look for string to bytes conversion logic and add padding. The issue is well described and localized, making it suitable for a first time contributor.