PyCQA / PyCQA/bandit

Add a plugin to detect os.join with input

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#477 2 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
Python
Stars
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Forks
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Avg merge
5d 3h
Merged PRs (30d)
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Description

Transfer of OpenStack blueprint to GH issue:
https://blueprints.launchpad.net/bandit/+spec/add-os-join-plugin

If os.join is used with un-filtered user input it can lead to path traversal. A plugin that detects its use could be useful for pentesting.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the linked OpenStack blueprint and examining existing Bandit plugin implementations for how calls and user-controlled input are detected. Done means a plugin flags os.join when it receives unfiltered user input, with coverage for the relevant detection behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
devtools, security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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