> For the complete documentation index, see [llms.txt](https://blog.s1rn3tz.ovh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.s1rn3tz.ovh/pentest-mobile/android/stockage-de-donnees-non-securise/carte-sd.md).

# Carte SD

La carte SD est un stockage externe accessible pour n'importe quelle application installée sur un appareil Android. Il est donc très dangereux d'y sauvegarder des données sensibles.

Une façon simple de vérifier si des données sensible sont enregistrés dessus par une application est de faire deux snapshots de ce stockage externe, 

* Le premier avant d'ouvrir l'application en créant un fichier vide qui va servir de timestamp
  * `$  adb shell "touch /data/local/tmp/timestamp"`
* Puis un deuxième après avoir utilisé chaque fonctionnalité de l'application qui va permettre de créer un fichier output.txt contenant tous les fichiers enregistrés dans l'arborescence de `/sdcard/` depuis le timestamp précédemment créé.

```
#!/bin/bash

# SUMMARY: List all files created after the creation date of a file created in run_before

adb shell "find /sdcard/ -type f -newer /data/local/tmp/timestamp" > output.txt
adb shell "rm /data/local/tmp/timestamp"
mkdir -p new_files
while read -r line; do
  adb pull "$line" ./new_files/
done < output.txt
```


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