CVE-2021-20873

Yappli is an application development platform which provides the function to access a requested URL using Custom URL Scheme. When Android apps are developed with Yappli versions since v7.3.6 and prior to v9.30.0, they are vulnerable to improper authorization in Custom URL Scheme handler, and may be directed to unintended sites via a specially crafted URL.

CVSS v3 8.1 HIGH
CVSS v2.0 5.8 MEDIUM

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://jvn.jp/en/jp/JVN66422035/index.html	Third Party Advisory
https://support.yappli.co.jp/hc/ja/articles/4410249902745	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yappli:yappli:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-12-28 02:15

Updated : 2022-01-12 15:46

NVD link : CVE-2021-20873

Mitre link : CVE-2021-20873

CVE.ORG link : CVE-2021-20873

JSON object : View

Products Affected

yappli

yappli

CWE

CWE-862

Missing Authorization

{"id": "CVE-2021-20873", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 4.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}]}, "published": "2021-12-28T02:15:06.907", "references": [{"url": "https://jvn.jp/en/jp/JVN66422035/index.html", "tags": ["Third Party Advisory"], "source": "vultures@jpcert.or.jp"}, {"url": "https://support.yappli.co.jp/hc/ja/articles/4410249902745", "tags": ["Vendor Advisory"], "source": "vultures@jpcert.or.jp"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "Yappli is an application development platform which provides the function to access a requested URL using Custom URL Scheme. When Android apps are developed with Yappli versions since v7.3.6 and prior to v9.30.0, they are vulnerable to improper authorization in Custom URL Scheme handler, and may be directed to unintended sites via a specially crafted URL."}, {"lang": "es", "value": "Yappli es una plataforma de desarrollo de aplicaciones que proporciona la funci\u00f3n de acceder a una URL solicitada usando Custom URL Scheme. Cuando las aplicaciones de Android son desarrolladas con Yappli versiones desde la v7.3.6 y anteriores a v9.30.0, son vulnerables a una autorizaci\u00f3n inapropiada en el manejador de Custom URL Scheme, y pueden ser dirigidas a sitios no deseados por medio de una URL especialmente dise\u00f1ada"}], "lastModified": "2022-01-12T15:46:08.730", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:yappli:yappli:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "702763D1-E8BD-49CE-86F6-7B3425319FFE", "versionEndExcluding": "9.30.0", "versionStartIncluding": "7.3.6"}], "operator": "OR"}]}], "sourceIdentifier": "vultures@jpcert.or.jp"}