GSD-2023-34253
Vulnerability from gsd - Updated: 2023-12-13 01:20Details
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"
},
"osvSchema": {
"aliases": [
"CVE-2023-34253"
],
"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"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2023-34253",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "grav",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "\u003c 1.7.42"
}
]
}
}
]
},
"vendor_name": "getgrav"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "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."
}
]
},
"impact": {
"cvss": [
{
"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"
}
]
},
"problemtype": {
"problemtype_data": [
{
"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"
}
]
}
]
},
"references": {
"reference_data": [
{
"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"
},
{
"name": "https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b",
"refsource": "MISC",
"url": "https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b"
},
{
"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190",
"refsource": "MISC",
"url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190"
},
{
"name": "https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/",
"refsource": "MISC",
"url": "https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/"
},
{
"name": "https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83",
"refsource": "MISC",
"url": "https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83"
}
]
},
"source": {
"advisory": "GHSA-j3v8-v77f-fvgm",
"discovery": "UNKNOWN"
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c1.7.42",
"affected_versions": "All versions before 1.7.42",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-78",
"CWE-937",
"CWE-94"
],
"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": [
"1.7.42"
],
"identifier": "CVE-2023-34253",
"identifiers": [
"GHSA-j3v8-v77f-fvgm",
"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)",
"urls": [
"https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm",
"https://nvd.nist.gov/vuln/detail/CVE-2023-34253",
"https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec",
"https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b",
"https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8",
"https://github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5",
"https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190",
"https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/",
"https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83",
"https://github.com/advisories/GHSA-j3v8-v77f-fvgm"
],
"uuid": "9f43c13b-30e8-4ce4-a2e2-23517b114294"
}
]
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "1.7.42",
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2023-34253"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83",
"refsource": "MISC",
"tags": [
"Patch"
],
"url": "https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83"
},
{
"name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190",
"refsource": "MISC",
"tags": [
"Issue Tracking"
],
"url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190"
},
{
"name": "https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/",
"refsource": "MISC",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/"
},
{
"name": "https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm",
"refsource": "MISC",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm"
},
{
"name": "https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b",
"refsource": "MISC",
"tags": [
"Patch"
],
"url": "https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b"
}
]
}
},
"impact": {
"baseMetricV3": {
"cvssV3": {
"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
}
},
"lastModifiedDate": "2023-06-23T17:48Z",
"publishedDate": "2023-06-14T23:15Z"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…