> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/fr/web/sql-injection/error-based-sql-injection.md).
# Injection SQL basée sur les erreurs
Notes sur l’injection SQL basée sur les erreurs pour les laboratoires PortSwigger Web Security Academy, y compris le flux de travail d’exploitation, les tests de charge utile, la validation avec Burp Suite et le contexte de remédiation.
### Injection SQL visible basée sur les erreurs
**Contexte bref :** l'application concatène la valeur du `TrackingId` cookie dans une requête SQL. En provoquant une \*\* erreur de conversion / fonction\*\* sur le contenu d'une colonne (nom d'utilisateur/mot de passe), certains SGBD renvoient un message d'erreur contenant la valeur — ce message devient une chaîne d'exfiltration. Objectif : récupérer le `administrateur` mot de passe puis se connecter.
```sql
' or 1=cast((select username from users limit 1)as INT)-- -
```
```sql
' or 1=cast((select password from users limit 1)as INT)-- -
```
---
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