OpenEMR up to 5.0.1 custom/ajax_download.php fileName path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in OpenEMR up to 5.0.1. The affected element is an unknown function of the file custom/ajax_download.php. The manipulation of the argument fileName leads to path traversal. This vulnerability is documented as CVE-2019-14530. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in OpenEMR up to 5.0.1 (Business Process Management Software). This issue affects an unknown code of the file custom/ajax_download.php. The manipulation of the argument fileName with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

An issue was discovered in custom/ajax_download.php in OpenEMR before 5.0.2 via the fileName parameter. An attacker can download any file (that is readable by the user www-data) from server storage. If the requested file is writable for the www-data user and the directory /var/www/openemr/sites/default/documents/cqm_qrda/ exists, it will be deleted from server.

The weakness was released 08/13/2019. The identification of this vulnerability is CVE-2019-14530 since 08/02/2019. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is needed for exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept. By approaching the search of inurl:custom/ajax_download.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.0.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (50037). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 5.0.0
• 5.0.1

License

• open-source

Website

• Product: https://github.com/openemr/openemr/

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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