Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2024-03-06 11:01

Modified

2025-05-20 10:02

Summary

Security issue with external entity loading in XML without enabling it

Details

In PHP versions 8.0. before 8.0.30, 8.1. before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "php",
        "purl": "pkg:bitnami/php"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.30"
            },
            {
              "introduced": "8.1.0"
            },
            {
              "fixed": "8.1.22"
            },
            {
              "introduced": "8.2.0"
            },
            {
              "fixed": "8.2.9"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-3823"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as\u00a0ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.",
  "id": "BIT-php-2023-3823",
  "modified": "2025-05-20T10:02:07.006Z",
  "published": "2024-03-06T11:01:30.975Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrr"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7NBF77WN6DTVTY2RE73IGPYD6M4PIAWA/"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230825-0001/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3823"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Security issue with external entity loading in XML without enabling it"
}

CVE-2023-3823 (GCVE-0-2023-3823)

Vulnerability from cvelistv5 – Published: 2023-08-11 05:42 – Updated: 2025-02-13 17:01

Title

Security issue with external entity loading in XML without enabling it

Summary

In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.

Severity ?

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Assigner

php

References

URL

Tags

	https://github.com/php/php-src/security/advisorie…
	https://lists.fedoraproject.org/archives/list/pac…
	https://security.netapp.com/advisory/ntap-2023082…
	https://lists.debian.org/debian-lts-announce/2023…

Impacted products

	Vendor	Product	Version
	PHP Group	PHP	Affected: 8.0.* , < 8.0.30 (semver) Affected: 8.1.* , < 8.1.22 (semver) Affected: 8.2.* , < 8.2.8 (semver)

Credits

Joas Schilling

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-02T07:08:50.269Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrr"
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7NBF77WN6DTVTY2RE73IGPYD6M4PIAWA/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20230825-0001/"
          },
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            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.0.30",
              "status": "affected",
              "version": "8.0.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.1.22",
              "status": "affected",
              "version": "8.1.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.2.8",
              "status": "affected",
              "version": "8.2.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
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          "type": "reporter",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Joas Schilling"
        }
      ],
      "datePublic": "2023-08-05T04:00:00.000Z",
      "descriptions": [
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            }
          ],
          "value": "In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as\u00a0ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-197",
          "descriptions": [
            {
              "lang": "en",
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            }
          ]
        }
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      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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        "dateUpdated": "2023-09-05T22:06:18.333Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
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      },
      "references": [
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        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20230825-0001/"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00002.html"
        }
      ],
      "source": {
        "advisory": "https://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j",
        "discovery": "EXTERNAL"
      },
      "title": "Security issue with external entity loading in XML without enabling it",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Disable external entity loader, e.g. like this:\u0026nbsp;\u003cpre\u003elibxml_set_external_entity_loader(function () { return null; });\u003c/pre\u003e\u003cbr\u003e"
            }
          ],
          "value": "Disable external entity loader, e.g. like this:\u00a0libxml_set_external_entity_loader(function () { return null; });"
        }
      ],
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  "cveMetadata": {
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    "assignerShortName": "php",
    "cveId": "CVE-2023-3823",
    "datePublished": "2023-08-11T05:42:25.771Z",
    "dateReserved": "2023-07-21T16:16:57.133Z",
    "dateUpdated": "2025-02-13T17:01:48.139Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2023-3823 (GCVE-0-2023-3823)

Tags

Sightings

Nomenclature