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Zip Slip Vulnerability

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#73 0 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
php
Domain
security

Research direction

Start by inspecting the ZIP handling code corresponding to src/WordPress/Zip/functions.php at the referenced line, then trace how archive filenames and symlinks are extracted. Confirm the intended traversal and symlink behavior, add coverage for the reported cases, and verify that extraction cannot write outside its destination.

Written by the indexing model from the issue text.

Description

blocker V1

As we discussed today, there's a ZIP Slip vulnerability below here. The filename should be sanitized to prevent directory traversal:

https://github.com/WordPress/blueprints-library/blob/f2ddfa54a97220249201535f1d37726c416f915d/src/WordPress/Zip/functions.php#L17C51-L17C62

Also, maybe it's good to check for Symlinks and how they are being treated nowadays ;)

Dominant language
PHP
Stars
61
Forks
23
Avg merge
20h 9m
Merged PRs (30d)
7

Getting set up

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  • No pull request template
  • No 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.

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