GSD-2021-29440

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.
Aliases
Aliases
CVE-2021-29440
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{
  "GSD": {
    "alias": "CVE-2021-29440",
    "description": "Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.",
    "id": "GSD-2021-29440",
    "references": [
      "https://packetstormsecurity.com/files/cve/CVE-2021-29440"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-29440"
      ],
      "details": "Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.",
      "id": "GSD-2021-29440",
      "modified": "2023-12-13T01:23:36.300322Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-29440",
        "STATE": "PUBLIC",
        "TITLE": "Twig allowing dangerous PHP functions by default"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "grav",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c 1.7.11"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "getgrav"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "{\"CWE-94\":\"Improper Control of Generation of Code (\u0027Code Injection\u0027)\"}"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc",
            "refsource": "CONFIRM",
            "url": "https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc"
          },
          {
            "name": "https://packagist.org/packages/getgrav/grav",
            "refsource": "MISC",
            "url": "https://packagist.org/packages/getgrav/grav"
          },
          {
            "name": "http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html",
            "refsource": "MISC",
            "url": "http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html"
          },
          {
            "name": "https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities",
            "refsource": "MISC",
            "url": "https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-g8r4-p96j-xfxc",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c=1.7.10",
          "affected_versions": "All versions up to 1.7.10",
          "cvss_v2": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "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": "2021-07-13",
          "description": "Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.",
          "fixed_versions": [
            "1.7.11"
          ],
          "identifier": "CVE-2021-29440",
          "identifiers": [
            "GHSA-g8r4-p96j-xfxc",
            "CVE-2021-29440"
          ],
          "not_impacted": "All versions after 1.7.10",
          "package_slug": "packagist/getgrav/grav",
          "pubdate": "2021-04-16",
          "solution": "Upgrade to version 1.7.11 or above.",
          "title": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
          "urls": [
            "https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc",
            "https://packagist.org/packages/getgrav/grav",
            "https://nvd.nist.gov/vuln/detail/CVE-2021-29440",
            "http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html",
            "https://github.com/advisories/GHSA-g8r4-p96j-xfxc"
          ],
          "uuid": "73efb1b6-5e39-45c4-be80-f113586e8fee"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.7.11",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-29440"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "lang": "en",
              "value": "Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-94"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://packagist.org/packages/getgrav/grav",
              "refsource": "MISC",
              "tags": [
                "Product",
                "Third Party Advisory"
              ],
              "url": "https://packagist.org/packages/getgrav/grav"
            },
            {
              "name": "https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc"
            },
            {
              "name": "http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html"
            },
            {
              "name": "https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "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": "2022-11-09T03:12Z",
      "publishedDate": "2021-04-13T20:15Z"
    }
  }
}


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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.



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