gsd-2023-34253
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
Grav is a file-based Web platform. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. 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. A patch in version 1.7.42 improves the denylist.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2023-34253",
"id": "GSD-2023-34253"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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],
"details": "Grav is a file-based Web platform. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. 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. A patch in version 1.7.42 improves the denylist.",
"id": "GSD-2023-34253",
"modified": "2023-12-13T01:20:31.160628Z",
"schema_version": "1.4.0"
}
},
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"ID": "CVE-2023-34253",
"STATE": "PUBLIC"
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"affects": {
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{
"product": {
"product_data": [
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"product_name": "grav",
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}
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},
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"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"
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"description": [
{
"cweId": "CWE-184",
"lang": "eng",
"value": "CWE-184: Incomplete List of Disallowed Inputs"
}
]
},
{
"description": [
{
"cweId": "CWE-1336",
"lang": "eng",
"value": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine"
}
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}
]
},
"references": {
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{
"name": "https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm",
"refsource": "MISC",
"url": "https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm"
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"name": "https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b",
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"source": {
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"discovery": "UNKNOWN"
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"affected_versions": "All versions before 1.7.42",
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"cwe_ids": [
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"CWE-78",
"CWE-937",
"CWE-94"
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"date": "2023-07-01",
"description": "Grav is a file-based Web platform. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. 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. A patch in version 1.7.42 improves the denylist.",
"fixed_versions": [
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"identifier": "CVE-2023-34253",
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"CVE-2023-34253"
],
"not_impacted": "All versions starting from 1.7.42",
"package_slug": "packagist/getgrav/grav",
"pubdate": "2023-06-16",
"solution": "Upgrade to version 1.7.42 or above.",
"title": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
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"https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8",
"https://github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5",
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"uuid": "9f43c13b-30e8-4ce4-a2e2-23517b114294"
}
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"nvd.nist.gov": {
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"attackVector": "NETWORK",
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"baseScore": 7.2,
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"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
}
},
"lastModifiedDate": "2023-06-23T17:48Z",
"publishedDate": "2023-06-14T23:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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