CVE-2021-21126 - Vulnerability Details - OpenCVE

Description

Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.

Published: 2021-02-09

Score: 6.5 Medium

EPSS: 10.0% Moderate

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

Google

Chrome

affected

Version	Status	Constraints
`unspecified`	affected	< 88.0.4324.96

Configuration 1 [-]

OR	cpe:2.3:a:google:chrome::::::::
	cpe:2.3:a:microsoft:edge_chromium::::::::

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
Debian DSA	DSA-4846-1	chromium security update
EUVD	EUVD-2021-8517	Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.10011.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html
https://crbug.com/1108126
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126

History

No history.

Subscriptions

Google Chrome

Microsoft Edge Chromium

MITRE

Status: PUBLISHED

Assigner: Chrome

Published: 2021-02-09T13:56:01.000Z

Updated: 2024-08-03T18:01:14.031Z

Reserved: 2020-12-21T00:00:00.000Z

Link: CVE-2021-21126

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-02-09T14:15:16.013

Modified: 2024-11-21T05:47:37.143

Link: CVE-2021-21126

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-20

{"containers": {"cna": {"affected": [{"product": "Chrome", "vendor": "Google", "versions": [{"lessThan": "88.0.4324.96", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension."}], "problemTypes": [{"descriptions": [{"description": "Insufficient policy enforcement", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-02-24T19:53:08.000Z", "orgId": "ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28", "shortName": "Chrome"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"}, {"tags": ["x_refsource_MISC"], "url": "https://crbug.com/1108126"}, {"tags": ["x_refsource_MISC"], "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "chrome-cve-admin@google.com", "ID": "CVE-2021-21126", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Chrome", "version": {"version_data": [{"version_affected": "<", "version_value": "88.0.4324.96"}]}}]}, "vendor_name": "Google"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Insufficient policy enforcement"}]}]}, "references": {"reference_data": [{"name": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html", "refsource": "MISC", "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"}, {"name": "https://crbug.com/1108126", "refsource": "MISC", "url": "https://crbug.com/1108126"}, {"name": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126", "refsource": "MISC", "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:01:14.031Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://crbug.com/1108126"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126"}]}]}, "cveMetadata": {"assignerOrgId": "ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28", "assignerShortName": "Chrome", "cveId": "CVE-2021-21126", "datePublished": "2021-02-09T13:56:01.000Z", "dateReserved": "2020-12-21T00:00:00.000Z", "dateUpdated": "2024-08-03T18:01:14.031Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "matchCriteriaId": "565ED6B8-8F41-4E79-A280-33CB321E607F", "versionEndExcluding": "88.0.4324.96", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*", "matchCriteriaId": "F4045760-DF4A-4728-9B52-0280FC45C05D", "versionEndExcluding": "88.0.705.50", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension."}, {"lang": "es", "value": "Una aplicaci\u00f3n de pol\u00edticas insuficientes en extensions de Google Chrome versiones anteriores a 88.0.4324.96, permiti\u00f3 a un atacante remoto omitir el aislamiento del sitio por medio de una Extension de Chrome dise\u00f1ada"}], "id": "CVE-2021-21126", "lastModified": "2024-11-21T05:47:37.143", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-02-09T14:15:16.013", "references": [{"source": "chrome-cve-admin@google.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"}, {"source": "chrome-cve-admin@google.com", "tags": ["Permissions Required", "Third Party Advisory"], "url": "https://crbug.com/1108126"}, {"source": "chrome-cve-admin@google.com", "tags": ["Third Party Advisory"], "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Permissions Required", "Third Party Advisory"], "url": "https://crbug.com/1108126"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126"}], "sourceIdentifier": "chrome-cve-admin@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}