github - ghsa-qm58-cvvm-c5qr

ghsa-qm58-cvvm-c5qr

Vulnerability from github

Published

2021-06-15 15:51

Modified

2022-08-11 00:02

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

elFinder unsafe upload filtering leading to remote code execution

Details

Impact

Before elFinder 2.1.58, the upload filter did not disallow the upload of .phar files. As several Linux distributions are now shipping Apache configured in a way it will process these files as PHP scripts, attackers could gain arbitrary code execution on the server hosting the PHP connector (even in minimal configuration).

Patches

The issue has been addressed with https://github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1, associating .phar files to the right MIME type. Unless explicitly allowed in the configuration, such files cannot be uploaded anymore. This patch is part of the last release of elFinder, 2.1.58.

Workarounds

If you can't update to 2.1.58, make sure your connector is not exposed without authentication.

Important tips

Server-side scripts can often be created as text files. Currently, elFinder has an appropriate MIME type set for file extensions that are generally runnable on a web server.

However, the server has various settings. In some cases, the executable file may be judged as "text/plain". Therefore, elFinder installers should understand the extensions that can be executed on the web server where elFinder is installed, and check if there are any missing items in the elFinder settings.

The elFinder PHP connector has an option "additionalMimeMap" that specifies the MIME type for each extension. See #3295(comment) for more information.

References

https://snyk.io/vuln/composer:studio-42%2Felfinder
https://github.com/Studio-42/elFinder/issues/3295
Further technical details will be disclosed on https://blog.sonarsource.com/tag/security after some time.

For more information

If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to support [at] snyk.io or vulnerability.research [at] sonarsource.com; - The maintainers, by opening an issue on this repository.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "studio-42/elfinder"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.58"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-23394"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-06-14T22:14:26Z",
    "nvd_published_at": "2021-06-13T11:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nBefore elFinder 2.1.58, the upload filter did not disallow the upload of `.phar` files. As several Linux distributions are now shipping Apache configured in a way it will process these files as PHP scripts, attackers could gain arbitrary code execution on the server hosting the PHP connector (even in minimal configuration).\n\n### Patches\n\nThe issue has been addressed with https://github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1, associating `.phar` files to the right MIME type. Unless explicitly allowed in the configuration, such files cannot be uploaded anymore. This patch is part of the last release of elFinder, 2.1.58.\n\n### Workarounds\n\nIf you can\u0027t update to 2.1.58, make sure your connector is not exposed without authentication.\n\n### Important tips\n\nServer-side scripts can often be created as text files. Currently, elFinder has an appropriate MIME type set for file extensions that are generally runnable on a web server.\n\nHowever, the server has various settings. In some cases, the executable file may be judged as \"text/plain\". Therefore, elFinder installers should understand the extensions that can be executed on the web server where elFinder is installed, and check if there are any missing items in the elFinder settings.\n\nThe elFinder PHP connector has an option \"additionalMimeMap\" that specifies the MIME type for each extension. See [#3295(comment)](https://github.com/Studio-42/elFinder/issues/3295#issuecomment-853042139) for more information.\n\n### References\n\n- https://snyk.io/vuln/composer:studio-42%2Felfinder\n- https://github.com/Studio-42/elFinder/issues/3295\n- Further technical details will be disclosed on https://blog.sonarsource.com/tag/security after some time.\n\n### For more information\n\nIf you have any questions or comments about this advisory, you can contact:\n- The original reporters, by sending an email to  support [at] snyk.io or vulnerability.research [at] sonarsource.com;\n- The maintainers, by opening an issue on this repository.",
  "id": "GHSA-qm58-cvvm-c5qr",
  "modified": "2022-08-11T00:02:52Z",
  "published": "2021-06-15T15:51:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-qm58-cvvm-c5qr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23394"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Studio-42/elFinder/issues/3295"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1"
    },
    {
      "type": "WEB",
      "url": "https://blog.sonarsource.com/elfinder-case-study-of-web-file-manager-vulnerabilities"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Studio-42/elFinder"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-PHP-STUDIO42ELFINDER-1290554"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "elFinder unsafe upload filtering leading to remote code execution"
}

CVE-2021-23394 (GCVE-0-2021-23394)

Vulnerability from cvelistv5

Published

2021-06-13 11:05

Modified

2024-09-16 22:30

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

Remote Code Execution (RCE)

Summary

The package studio-42/elfinder before 2.1.58 are vulnerable to Remote Code Execution (RCE) via execution of PHP code in a .phar file. NOTE: This only applies if the server parses .phar files as PHP.

References

URL

Tags

	https://snyk.io/vuln/SNYK-PHP-STUDIO42ELFINDER-1290554	x_refsource_MISC
	https://github.com/Studio-42/elFinder	x_refsource_MISC
	https://github.com/Studio-42/elFinder/issues/3295	x_refsource_MISC
	https://github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1	x_refsource_MISC
	https://blog.sonarsource.com/elfinder-case-study-of-web-file-manager-vulnerabilities/	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	studio-42/elfinder	Version: unspecified < 2.1.58

Show details on NVD website

JSON

To clipboard

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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.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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.

Action not permitted

ghsa-qm58-cvvm-c5qr

Vulnerability from github

Impact

Patches

Workarounds

Important tips

References

For more information

CVE-2021-23394 (GCVE-0-2021-23394)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature