CVE-2020-28463 Server-side Request Forgery (SSRF)

2021-02-1800:00:00

snyk

www.cve.org

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P

6.6 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

52.6%

JSON

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” /> 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

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "reportlab",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]