CVE-2020-28463

Advisory

Reportlab 3.5.55 includes a security fix: Server-side Request Forgery (SSRF) vulnerability when using img tags. In order to reduce risk, use trustedSchemes & trustedHosts (see in Reportlab's documentation).
https://github.com/advisories/GHSA-mpvw-25mg-59vx
https://hg.reportlab.com/hg-public/reportlab/rev/7f2231703dc7

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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 See CVE-2020-28463.


MISC:https://snyk.io/vuln/SNYK-PYTHON-REPORTLAB-1022145: https://snyk.io/vuln/SNYK-PYTHON-REPORTLAB-1022145
MISC:https://www.reportlab.com/docs/reportlab-userguide.pdf: https://www.reportlab.com/docs/reportlab-userguide.pdf

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28463
• https://snyk.io/vuln/SNYK-PYTHON-REPORTLAB-1022145
• https://www.reportlab.com/docs/reportlab-userguide.pdf
• https://lists.fedoraproject.org/archives/list/[email protected]/message/HMUJA5GZTPQ5WRYUCCK2GEZM4W43N7HH/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/YZQSFCID67K6BTC655EQY6MNOF35QI44/
• https://lists.debian.org/debian-lts-announce/2023/09/msg00037.html