CWE-434
AllowedUnrestricted Upload of File with Dangerous Type
Abstraction: Base · Status: Draft
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
6008 vulnerabilities reference this CWE, most recent first.
GHSA-CMCW-CW5C-RG22
Vulnerability from github – Published: 2022-05-24 17:43 – Updated: 2023-08-08 15:31VMware View Planner 4.x prior to 4.6 Security Patch 1 contains a remote code execution vulnerability. Improper input validation and lack of authorization leading to arbitrary file upload in logupload web application. An unauthorized attacker with network access to View Planner Harness could upload and execute a specially crafted file leading to remote code execution within the logupload container.
{
"affected": [],
"aliases": [
"CVE-2021-21978"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-03T18:15:00Z",
"severity": "CRITICAL"
},
"details": "VMware View Planner 4.x prior to 4.6 Security Patch 1 contains a remote code execution vulnerability. Improper input validation and lack of authorization leading to arbitrary file upload in logupload web application. An unauthorized attacker with network access to View Planner Harness could upload and execute a specially crafted file leading to remote code execution within the logupload container.",
"id": "GHSA-cmcw-cw5c-rg22",
"modified": "2023-08-08T15:31:16Z",
"published": "2022-05-24T17:43:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21978"
},
{
"type": "WEB",
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0003.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/161879/VMware-View-Planner-4.6-Remote-Code-Execution.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CMG2-755Q-2PJ5
Vulnerability from github – Published: 2025-12-02 09:30 – Updated: 2025-12-02 09:30The SureMail – SMTP and Email Logs Plugin for WordPress is vulnerable to Unrestricted Upload of File with Dangerous Type in versions up to and including 1.9.0. This is due to the plugin's save_file() function in inc/emails/handler/uploads.php which duplicates all email attachments to a web-accessible directory (wp-content/uploads/suremails/attachments/) without validating file extensions or content types. Files are saved with predictable names derived from MD5 hashes of their content. While the plugin attempts to protect this directory with an Apache .htaccess file to disable PHP execution, this protection is ineffective on nginx, IIS, and Lighttpd servers, or on misconfigured Apache installations. This makes it possible for unauthenticated attackers to achieve Remote Code Execution by uploading malicious PHP files through any public form that emails attachments, calculating the predictable filename, and directly accessing the file to execute arbitrary code granted they are exploiting a site running on an affected web server configuration.
{
"affected": [],
"aliases": [
"CVE-2025-13516"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-02T09:15:47Z",
"severity": "HIGH"
},
"details": "The SureMail \u2013 SMTP and Email Logs Plugin for WordPress is vulnerable to Unrestricted Upload of File with Dangerous Type in versions up to and including 1.9.0. This is due to the plugin\u0027s save_file() function in inc/emails/handler/uploads.php which duplicates all email attachments to a web-accessible directory (wp-content/uploads/suremails/attachments/) without validating file extensions or content types. Files are saved with predictable names derived from MD5 hashes of their content. While the plugin attempts to protect this directory with an Apache .htaccess file to disable PHP execution, this protection is ineffective on nginx, IIS, and Lighttpd servers, or on misconfigured Apache installations. This makes it possible for unauthenticated attackers to achieve Remote Code Execution by uploading malicious PHP files through any public form that emails attachments, calculating the predictable filename, and directly accessing the file to execute arbitrary code granted they are exploiting a site running on an affected web server configuration.",
"id": "GHSA-cmg2-755q-2pj5",
"modified": "2025-12-02T09:30:26Z",
"published": "2025-12-02T09:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13516"
},
{
"type": "WEB",
"url": "https://cwe.mitre.org/data/definitions/434.html"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/suremails/trunk/inc/admin/plugin.php#L407"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/suremails/trunk/inc/emails/handler/uploads.php#L113"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/suremails/trunk/inc/emails/handler/uploads.php#L231"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset/3403145/suremails/trunk?contextall=1\u0026old=3389326\u0026old_path=%2Fsuremails%2Ftrunk"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f3a20047-a325-4d29-a848-7ffa525d0bad?source=cve"
}
],
"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"
}
]
}
GHSA-CMGH-J7WM-G8FG
Vulnerability from github – Published: 2024-06-12 15:31 – Updated: 2024-08-14 15:31Arbitrary File Upload vulnerability in MegaBIP software allows attacker to upload any file to the server (including a PHP code file) without an authentication. This issue affects MegaBIP software versions through 5.10.
{
"affected": [],
"aliases": [
"CVE-2024-1659"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-12T14:15:10Z",
"severity": "CRITICAL"
},
"details": "Arbitrary File Upload vulnerability in MegaBIP software allows attacker to upload any file to the server (including a PHP code file) without an authentication.\u00a0This issue affects MegaBIP software versions through 5.10.",
"id": "GHSA-cmgh-j7wm-g8fg",
"modified": "2024-08-14T15:31:11Z",
"published": "2024-06-12T15:31:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-1659"
},
{
"type": "WEB",
"url": "https://cert.pl/en/posts/2024/06/CVE-2024-1576"
},
{
"type": "WEB",
"url": "https://cert.pl/posts/2024/06/CVE-2024-1576"
},
{
"type": "WEB",
"url": "https://megabip.pl"
},
{
"type": "WEB",
"url": "https://www.gov.pl/web/cyfryzacja/rekomendacja-pelnomocnika-rzadu-ds-cyberbezpieczenstwa-dotyczaca-biuletynow-informacji-publicznej"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:I/V:D/RE:M/U:Amber",
"type": "CVSS_V4"
}
]
}
GHSA-CMMV-W3J8-5HM4
Vulnerability from github – Published: 2024-04-03 12:31 – Updated: 2026-04-01 18:31Unrestricted Upload of File with Dangerous Type vulnerability in InstaWP Team InstaWP Connect allows Code Injection.This issue affects InstaWP Connect: from n/a through 0.1.0.8.
{
"affected": [],
"aliases": [
"CVE-2024-25918"
],
"database_specific": {
"cwe_ids": [
"CWE-434",
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-03T12:15:10Z",
"severity": "CRITICAL"
},
"details": "Unrestricted Upload of File with Dangerous Type vulnerability in InstaWP Team InstaWP Connect allows Code Injection.This issue affects InstaWP Connect: from n/a through 0.1.0.8.",
"id": "GHSA-cmmv-w3j8-5hm4",
"modified": "2026-04-01T18:31:44Z",
"published": "2024-04-03T12:31:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25918"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/instawp-connect/vulnerability/wordpress-instawp-connect-plugin-0-1-0-8-remote-code-execution-vulnerability?_s_id=cve"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/instawp-connect/wordpress-instawp-connect-plugin-0-1-0-8-remote-code-execution-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CP5F-X2VJ-PQGH
Vulnerability from github – Published: 2022-05-24 19:13 – Updated: 2022-05-24 19:13An issue in index.php/Dswjcms/Basis/resources of Dswjcms 1.6.4 allows attackers to execute arbitrary code via uploading a crafted PHP file.
{
"affected": [],
"aliases": [
"CVE-2020-19267"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-09T18:15:00Z",
"severity": "CRITICAL"
},
"details": "An issue in index.php/Dswjcms/Basis/resources of Dswjcms 1.6.4 allows attackers to execute arbitrary code via uploading a crafted PHP file.",
"id": "GHSA-cp5f-x2vj-pqgh",
"modified": "2022-05-24T19:13:59Z",
"published": "2022-05-24T19:13:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-19267"
},
{
"type": "WEB",
"url": "https://github.com/tifaweb/Dswjcms/issues/7"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-CP62-Q7V3-5Q5W
Vulnerability from github – Published: 2022-01-19 00:00 – Updated: 2022-01-25 00:02An unrestricted file upload vulnerability exists in Sourcecodester Free school management software 1.0. An attacker can leverage this vulnerability to enable remote code execution on the affected web server. Once a php webshell containing "" gets uploaded it is saved into /uploads/exam_question/ directory, and is accessible by all users.
{
"affected": [],
"aliases": [
"CVE-2021-46013"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-18T18:15:00Z",
"severity": "CRITICAL"
},
"details": "An unrestricted file upload vulnerability exists in Sourcecodester Free school management software 1.0. An attacker can leverage this vulnerability to enable remote code execution on the affected web server. Once a php webshell containing \"\u003c?php system($_GET[\"cmd\"]); ?\u003e\" gets uploaded it is saved into /uploads/exam_question/ directory, and is accessible by all users.",
"id": "GHSA-cp62-q7v3-5q5w",
"modified": "2022-01-25T00:02:13Z",
"published": "2022-01-19T00:00:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46013"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/50587"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-CP7R-FHJG-F2VC
Vulnerability from github – Published: 2026-02-24 21:31 – Updated: 2026-02-24 21:31Dell Wyse Management Suite, versions prior to WMS 5.5, contain an Unrestricted Upload of File with Dangerous Type vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Remote execution.
{
"affected": [],
"aliases": [
"CVE-2026-22766"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-24T20:27:46Z",
"severity": "HIGH"
},
"details": "Dell Wyse Management Suite, versions prior to WMS 5.5, contain an Unrestricted Upload of File with Dangerous Type vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Remote execution.",
"id": "GHSA-cp7r-fhjg-f2vc",
"modified": "2026-02-24T21:31:46Z",
"published": "2026-02-24T21:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22766"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-us/000429141/dsa-2026-103"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CP8H-XGPV-MJ82
Vulnerability from github – Published: 2025-07-19 12:30 – Updated: 2025-07-19 12:30The Work The Flow File Upload plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the jQuery-File-Upload-9.5.0 server and test files in versions up to, and including, 2.5.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.
{
"affected": [],
"aliases": [
"CVE-2015-10138"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-19T12:15:34Z",
"severity": "CRITICAL"
},
"details": "The Work The Flow File Upload plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the jQuery-File-Upload-9.5.0 server and test files in versions up to, and including, 2.5.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.",
"id": "GHSA-cp8h-xgpv-mj82",
"modified": "2025-07-19T12:30:34Z",
"published": "2025-07-19T12:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-10138"
},
{
"type": "WEB",
"url": "https://packetstormsecurity.com/files/131294"
},
{
"type": "WEB",
"url": "https://packetstormsecurity.com/files/131512"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=1127456%40work-the-flow-file-upload\u0026new=1127456%40work-the-flow-file-upload\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=1127457%40work-the-flow-file-upload\u0026new=1127457%40work-the-flow-file-upload\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/a49a81a9-3d4b-4c8d-b719-fc513aceecc6"
},
{
"type": "WEB",
"url": "https://www.acunetix.com/vulnerabilities/web/wordpress-plugin-work-the-flow-file-upload-arbitrary-file-upload-2-5-2"
},
{
"type": "WEB",
"url": "https://www.homelab.it/index.php/2015/04/04/wordpress-work-the-flow-file-upload-vulnerability"
},
{
"type": "WEB",
"url": "https://www.rapid7.com/db/modules/exploit/unix/webapp/wp_worktheflow_upload"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/eb271cc8-01ec-45eb-9d6f-efc55c7c3923?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CP9W-XXFQ-XFCF
Vulnerability from github – Published: 2023-07-06 19:24 – Updated: 2024-04-04 05:35Pluck CMS is vulnerable to an authenticated remote code execution (RCE) vulnerability through its “albums” module. Albums are used to create collections of images that can be inserted into web pages across the site. Albums allow the upload of various filetypes, which undergo a normalization process before being available on the site. Due to lack of file extension validation, it is possible to upload a crafted JPEG payload containing an embedded PHP web-shell. An attacker may navigate to it directly to achieve RCE on the underlying web server. Administrator credentials for the Pluck CMS web interface are required to access the albums module feature, and are thus required to exploit this vulnerability. CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C (8.2 High)
{
"affected": [],
"aliases": [
"CVE-2023-25828"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-03-27T17:15:00Z",
"severity": "HIGH"
},
"details": "Pluck CMS is vulnerable to an authenticated remote code execution (RCE) vulnerability through its \u201calbums\u201d module. Albums are used to create collections of images that can be inserted into web pages across the site. Albums allow the upload of various filetypes, which undergo a normalization process before being available on the site. Due to lack of file extension validation, it is possible to upload a crafted JPEG payload containing an embedded PHP web-shell. An attacker may navigate to it directly to achieve RCE on the underlying web server. Administrator credentials for the Pluck CMS web interface are required to access the albums module feature, and are thus required to exploit this vulnerability. CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C (8.2 High)",
"id": "GHSA-cp9w-xxfq-xfcf",
"modified": "2024-04-04T05:35:13Z",
"published": "2023-07-06T19:24:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25828"
},
{
"type": "WEB",
"url": "https://www.synopsys.com/blogs/software-security/pluck-cms-vulnerability"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CPJ9-WVVX-V589
Vulnerability from github – Published: 2023-12-29 09:30 – Updated: 2023-12-29 09:30A vulnerability was found in gopeak MasterLab up to 3.3.10. It has been declared as critical. Affected by this vulnerability is the function add/update of the file app/ctrl/admin/User.php. The manipulation of the argument avatar leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-249181 was assigned to this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2023-7159"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-12-29T07:15:11Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in gopeak MasterLab up to 3.3.10. It has been declared as critical. Affected by this vulnerability is the function add/update of the file app/ctrl/admin/User.php. The manipulation of the argument avatar leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-249181 was assigned to this vulnerability.",
"id": "GHSA-cpj9-wvvx-v589",
"modified": "2023-12-29T09:30:25Z",
"published": "2023-12-29T09:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-7159"
},
{
"type": "WEB",
"url": "https://note.zhaoj.in/share/FE79uijyqmG7"
},
{
"type": "WEB",
"url": "https://note.zhaoj.in/share/jNbywlXI46HV"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.249181"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.249181"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
Mitigation
Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]
Mitigation MIT-21
Strategy: Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation
Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
Mitigation
Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.
Mitigation
Strategy: Input Validation
Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]
Mitigation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
Mitigation MIT-15
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation
Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.
Mitigation
Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.
Mitigation MIT-17
Strategy: Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
Mitigation MIT-22
Strategy: Sandbox or Jail
- Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
- OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
- This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
- Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs
In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.