SSRF in Reportlab
CVE-2020-28463
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
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.015 (71.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Reportlab
- Fedoraproject Fedora — versions 34, 35
- N/a Reportlab — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- report@snyk.io (Exploit, Third Party Advisory, Release Notes)
- report@snyk.io (Product, Vendor Advisory)
- report@snyk.io (vendor-advisory)
- report@snyk.io (vendor-advisory)
- report@snyk.io (mailing-list)
Frequently asked questions
- What is CVE-2020-28463?
- CVE-2020-28463 is a medium-severity vulnerability in Reportlab, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2021-02-18.
- How severe is CVE-2020-28463?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-28463 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.