CVE-2020-27304

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 v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/	Exploit Third Party Advisory
https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ	Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf

Configurations

Configuration 1 (hide)

cpe:2.3:a:civetweb_project:civetweb:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*

Information

Published : 2021-10-21 09:15

Updated : 2022-06-14 04:15

NVD link : CVE-2020-27304

Mitre link : CVE-2020-27304

JSON object : View

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Products Affected

civetweb_project

civetweb

siemens

sinec_infrastructure_network_services

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/", "name": "https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ", "name": "https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf", "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf", "tags": ["Patch", "Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf", "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf", "tags": [], "refsource": "CONFIRM"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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"}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-22"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-27304", "ASSIGNER": "vuln@vdoo.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2021-10-21T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:civetweb_project:civetweb:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.15", "versionStartIncluding": "1.8"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.0.1.1"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-06-14T11:15Z"}

9.8 /10