Home/CVE/The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the b
CVE

CVE-2020-27304

The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the b

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.

CRITICAL · CVSS 9.8 EPSS 0.00995
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-23Relative Path Traversal
▤

Affected Products & Versions

2
civetweb project civetweb>= 1.8 and < 1.15
siemens sinec infrastructure network services< 1.0.1.1
⚠

Public Exploits & PoCs

1
pocjfrog.com · cve-2020-27304-rce-via-directory-traversal-in-civetweb-ht...jfrog.com
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · vuln@vdoo.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Oct 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

7
msrcCVE-2020-27304
siemens-csafSSA-222547
siemens-csafSSA-389290
suse-csafopenSUSE-SU-2021:1424-1
rhsaRHSA-2021:4902Important
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
https://groups.google.com/g/civetweb/c/yPBxNXdGgJQMailing ListThird Party Advisory
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