CVE-2013-6987

published 2013-12-31

CVE-2013-6987: Multiple directory traversal vulnerabilities in the FileBrowser components in Synology DiskStation Manager (DSM) before 4.3-3810 Update 3 allow remote…

Priority P3 58 high 7.5 CVSS 2.0

AV N AC L Au N C P I P A P

EXPLOIT

Multiple directory traversal vulnerabilities in the FileBrowser components in Synology DiskStation Manager (DSM) before 4.3-3810 Update 3 allow remote attackers to read, write, and delete arbitrary files via a .. (dot dot) in the (1) path parameter to file_delete.cgi or (2) folder_path parameter to file_share.cgi in webapi/FileStation/; (3) dlink parameter to fbdownload/; or unspecified parameters to (4) html5_upload.cgi, (5) file_download.cgi, (6) file_sharing.cgi, (7) file_MVCP.cgi, or (8) file_rename.cgi in webapi/FileStation/.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
synology	diskstation_manager	—	—

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

url /webapi/FileStation/file_delete.cgi↗

url /webapi/FileStation/file_share.cgi↗

url /fbdownload/↗

url /webapi/FileStation/html5_upload.cgi↗

url /webapi/FileStation/file_download.cgi↗

url /webapi/FileStation/file_sharing.cgi↗

url /webapi/FileStation/file_MVCP.cgi↗

url /webapi/FileStation/file_rename.cgi↗

command folder_path=/test/../../tmp&api=SYNO.FileStation.List&method=list&version=1↗

• → Detect directory traversal attempts (dot-dot sequences) in POST body parameters 'path', 'folder_path', and 'dlink' targeting Synology FileStation CGI endpoints. ↗
• → Monitor for POST requests to /webapi/FileStation/*.cgi and /fbdownload/ containing '../' or '..%2F' sequences in request parameters, particularly 'folder_path', 'path', and 'dlink'. ↗
• → Look for the custom header 'X-SYNO-TOKEN' in requests to FileStation CGI endpoints combined with traversal patterns, indicating authenticated exploitation attempts. ↗
• → Flag requests where 'folder_path' or 'path' parameters resolve outside expected share directories (e.g., traversal to /etc/passwd or /tmp). ↗

• · The exploit targets Synology DSM on port 5000 (default HTTP port); detections should be scoped to this non-standard port if the default configuration is in use. ↗
• · Exploitation requires a valid session (X-SYNO-TOKEN and session cookie), meaning the attacker must be authenticated or have obtained a valid session token prior to exploitation. ↗

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