CVE-2020-27304 Information

Description

The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows when using the built-in HTTP form-based file upload mechanism via the mg_handle_form_request API. Web applications that use the file upload form handler and use parts of the user-controlled filename in the output path are susceptible to directory traversal

CVSS Vector

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

Reference

https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/ https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8