CVE-2021-20796 - Vulnerability Details - OpenCVE

Description

Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors.

Published: 2021-10-13

Score: 6.5 Medium

EPSS: 1.5% Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cybozu, Inc.

Cybozu Remote Service

affected

Version	Status	Constraints
`3.1.8`	affected	—

Configuration 1 [-]

cpe:2.3:a:cybozu:remote_service_manager:3.1.8:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-8208	Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.01468.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://jvn.jp/en/jp/JVN52694228/index.html
https://kb.cybozu.support/article/37427

History

No history.

Subscriptions

Cybozu Remote Service Manager

MITRE

Status: PUBLISHED

Assigner: jpcert

Published: 2021-10-13T08:30:49.000Z

Updated: 2024-08-03T17:53:22.583Z

Reserved: 2020-12-17T00:00:00.000Z

Link: CVE-2021-20796

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-10-13T09:15:07.767

Modified: 2026-06-17T03:34:27.967

Link: CVE-2021-20796

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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

{"containers": {"cna": {"affected": [{"product": "Cybozu Remote Service", "vendor": "Cybozu, Inc.", "versions": [{"status": "affected", "version": "3.1.8"}]}], "descriptions": [{"lang": "en", "value": "Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors."}], "problemTypes": [{"descriptions": [{"description": "Directory traversal", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-10-13T08:30:48.000Z", "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://jvn.jp/en/jp/JVN52694228/index.html"}, {"tags": ["x_refsource_MISC"], "url": "https://kb.cybozu.support/article/37427"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "vultures@jpcert.or.jp", "ID": "CVE-2021-20796", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Cybozu Remote Service", "version": {"version_data": [{"version_value": "3.1.8"}]}}]}, "vendor_name": "Cybozu, Inc."}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Directory traversal"}]}]}, "references": {"reference_data": [{"name": "https://jvn.jp/en/jp/JVN52694228/index.html", "refsource": "MISC", "url": "https://jvn.jp/en/jp/JVN52694228/index.html"}, {"name": "https://kb.cybozu.support/article/37427", "refsource": "MISC", "url": "https://kb.cybozu.support/article/37427"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:53:22.583Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://jvn.jp/en/jp/JVN52694228/index.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://kb.cybozu.support/article/37427"}]}]}, "cveMetadata": {"assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "assignerShortName": "jpcert", "cveId": "CVE-2021-20796", "datePublished": "2021-10-13T08:30:49.000Z", "dateReserved": "2020-12-17T00:00:00.000Z", "dateUpdated": "2024-08-03T17:53:22.583Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "Cybozu Remote Service", "vendor": "Cybozu, Inc.", "versions": [{"status": "affected", "version": "3.1.8"}]}], "source": "vultures@jpcert.or.jp"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cybozu:remote_service_manager:3.1.8:*:*:*:*:*:*:*", "matchCriteriaId": "B9219597-06C9-4D4C-A5CB-C5B8CDB0C2C8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Directory traversal vulnerability in the management screen of Cybozu Remote Service 3.1.8 allows a remote authenticated attacker to upload an arbitrary file via unspecified vectors."}, {"lang": "es", "value": "Una vulnerabilidad de salto de directorio en la pantalla de administraci\u00f3n de Cybozu Remote Service versi\u00f3n 3.1.8, permite a un atacante remoto autenticado cargar un archivo arbitrario por medio de vectores no especificados"}], "id": "CVE-2021-20796", "lastModified": "2026-06-17T03:34:27.967", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-13T09:15:07.767", "references": [{"source": "vultures@jpcert.or.jp", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN52694228/index.html"}, {"source": "vultures@jpcert.or.jp", "tags": ["Vendor Advisory"], "url": "https://kb.cybozu.support/article/37427"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://jvn.jp/en/jp/JVN52694228/index.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.cybozu.support/article/37427"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}