Synology · Synology Diskstation Manager · CVE-2013-6987
**Name of the Vulnerable Software and Affected Versions**
Synology DiskStation Manager (DSM) versions prior to 4.3-3810 Update 3
**Description**
Multiple directory traversal vulnerabilities in the FileBrowser components allow remote attackers to read, write, and delete arbitrary files via a .. (dot dot) in the `path` parameter to "file delete.cgi" or `folder path` parameter to "file share.cgi" in "webapi/FileStation/"; the `dlink` parameter to "fbdownload/"; or unspecified parameters to "html5 upload.cgi", "file download.cgi", "file sharing.cgi", "file MVCP.cgi", or "file rename.cgi" in "webapi/FileStation/".
**Recommendations**
For versions prior to 4.3-3810 Update 3, update to version 4.3-3810 Update 3 or later to resolve the issue.
As a temporary workaround, consider restricting access to the vulnerable "webapi/FileStation/" endpoints until a patch is available.
Avoid using the `path` and `folder path` parameters in the affected API endpoints until the issue is resolved.
Restrict access to the `fbdownload/` endpoint to minimize the risk of exploitation.