CVE-2018-15142

published 2018-08-13

CVE-2018-15142: Directory traversal in portal/import_template.php in versions of OpenEMR before 5.0.1.4 allows a remote attacker authenticated in the patient portal to execute…

Priority P2 69 high 8.8 CVSS 3.0

AV N AC L PR L UI N S U C H I H A H

EXPLOIT

Directory traversal in portal/import_template.php in versions of OpenEMR before 5.0.1.4 allows a remote attacker authenticated in the patient portal to execute arbitrary PHP code by writing a file with a PHP extension via the "docid" and "content" parameters and accessing it in the traversed directory.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
open-emr	openemr	< 5.0.1.4	5.0.1.4

Detection & IOCs extracted from sources · hover to see the quote

path /openemr/portal/import_template.php↗

filename payload.php↗

command mode=delete&docid=payload.php↗

• → Monitor POST requests to /openemr/portal/import_template.php — exploitation uses the 'docid' and 'content' parameters for directory traversal and PHP file write, and the 'mode=delete' parameter for arbitrary file deletion. ↗
• → After exploitation, attacker navigates to the dropped PHP webshell at http://hostname/openemr/portal/<payload>.php — monitor for GET requests to .php files in the portal directory that were not previously present. ↗
• → Content-Type of exploit requests is application/x-www-form-urlencoded; correlate with POST to import_template.php from patient-portal authenticated sessions (presence of OpenEMR and PHPSESSID cookies). ↗

• · Exploitation requires the attacker to be authenticated in the patient portal — unauthenticated exploitation is not possible; detections should be scoped to authenticated portal sessions. ↗
• · Vulnerable versions are OpenEMR before 5.0.1.4; the PoC was demonstrated against version 5.0.1.3 specifically. ↗

CVSS provenance

nvd v3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 6.5 MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P

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