Kurz gesagt
- CVE-2020-28463 ist eine Schwachstelle (MITTEL (CVSS 6.5)) in reportlab.
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 1.3%, höher als bei 71.5% aller Schwachstellen.
- Abhilfe: auf 3.5.55 oder neuer aktualisieren.
| Package | Affected versions | Patched versions |
|---|
| reportlab PyPI | < 3.5.55
| 3.5.55
|
Description
All versions of package reportlab at time of writing are vulnerable to Server-side Request Forgery (SSRF) via img tags. In order to reduce risk, use trustedSchemes & trustedHosts (see in Reportlab's documentation)
Steps to reproduce by Karan Bamal:
- Download and install the latest package of reportlab
- Go to demos -> odyssey -> dodyssey
- In the text file odyssey.txt that needs to be converted to pdf inject
<img src="http://127.0.0.1:5000" valign="top"/>
- Create a nc listener
nc -lp 5000
- Run python3 dodyssey.py
- You will get a hit on your nc showing we have successfully proceded to send a server side request
- dodyssey.py will show error since there is no img file on the url, but we are able to do SSRF
NVD description
All versions of package reportlab are vulnerable to Server-side Request Forgery (SSRF) via img tags. In order to reduce risk, use trustedSchemes & trustedHosts (see in Reportlab's documentation) Steps to reproduce by Karan Bamal: 1. Download and install the latest package of reportlab 2. Go to demos -> odyssey -> dodyssey 3. In the text file odyssey.txt that needs to be converted to pdf inject <img src="http://127.0.0.1:5000" valign="top"/> 4. Create a nc listener nc -lp 5000 5. Run python3 dodyssey.py 6. You will get a hit on your nc showing we have successfully proceded to send a server side request 7. dodyssey.py will show error since there is no img file on the url, but we are able to do SSRF
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