{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-34252", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2023-05-31T13:51:51.174Z", "datePublished": "2023-06-14T21:38:48.358Z", "dateUpdated": "2024-08-02T16:01:54.351Z"}, "containers": {"cna": {"title": "Grav Server-side Template Injection via Insufficient Validation in filterFilter", "problemTypes": [{"descriptions": [{"cweId": "CWE-184", "lang": "en", "description": "CWE-184: Incomplete List of Disallowed Inputs", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1336", "lang": "en", "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w"}, {"name": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec", "tags": ["x_refsource_MISC"], "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec"}, {"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698", "tags": ["x_refsource_MISC"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698"}, {"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074", "tags": ["x_refsource_MISC"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074"}], "affected": [{"vendor": "getgrav", "product": "grav", "versions": [{"version": "< 1.7.42", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-06-14T22:17:06.852Z"}, "descriptions": [{"lang": "en", "value": "Grav is a flat-file content management system. Prior to version 1.7.42, there is a logic flaw in the `GravExtension.filterFilter()` function whereby validation against a denylist of unsafe functions is only performed when the argument passed to filter is a string. However, passing an array as a callable argument allows the validation check to be skipped. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. The vulnerability can be found in the `GravExtension.filterFilter()` function declared in `/system/src/Grav/Common/Twig/Extension/GravExtension.php`. Version 1.7.42 contains a patch for this issue. End users should also ensure that `twig.undefined_functions` and `twig.undefined_filters` properties in `/path/to/webroot/system/config/system.yaml` configuration file are set to `false` to disallow Twig from treating undefined filters/functions as PHP functions and executing them."}], "source": {"advisory": "GHSA-96xv-rmwj-6p9w", "discovery": "UNKNOWN"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T16:01:54.351Z"}, "title": "CVE Program Container", "references": [{"name": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w", "tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w"}, {"name": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec"}, {"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698"}, {"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074"}]}]}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*", "matchCriteriaId": "758F84B9-A2EC-45D8-86DD-B309DB02B9AE", "versionEndExcluding": "1.7.42", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Grav is a flat-file content management system. Prior to version 1.7.42, there is a logic flaw in the `GravExtension.filterFilter()` function whereby validation against a denylist of unsafe functions is only performed when the argument passed to filter is a string. However, passing an array as a callable argument allows the validation check to be skipped. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. The vulnerability can be found in the `GravExtension.filterFilter()` function declared in `/system/src/Grav/Common/Twig/Extension/GravExtension.php`. Version 1.7.42 contains a patch for this issue. End users should also ensure that `twig.undefined_functions` and `twig.undefined_filters` properties in `/path/to/webroot/system/config/system.yaml` configuration file are set to `false` to disallow Twig from treating undefined filters/functions as PHP functions and executing them."}], "id": "CVE-2023-34252", "lastModified": "2023-11-07T04:15:32.867", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2023-06-14T22:15:09.397", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-1336"}, {"lang": "en", "value": "CWE-184"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}