إرسال #1044961: DrayTek Vigor2960 Vigor2960 1.5.1.6 (revision 8218) Authenticated app_guest_export Path Traversal Write/Read/Delete

app_guest_export appends the user-controlled filename to /tmp/profile_backup/app_guest_setup/ without verifying, after path normalization, that the target remains inside that directory. The current PoC uses ../../../../www/portal/abcd_export_22157.csv and confirms that the handler generates a CSV at the traversed path, streams its contents in the HTTP response, and deletes the same path.

Affected interface: POST /cgi-bin/mainfunction.cgi with action=app_guest_export
Attacker-controlled parameter: filename
Confirmed impact: an authenticated attacker can select an unexpected CSV export path and trigger write, read-back, and deletion of that path.

## Vendor Confirmation

The vulnerability has been officially confirmed. The email is available at: https://github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/vendor_confirm

The official fix for this vulnerability has been released: https://fw.draytek.com.tw/Vigor2960/Firmware/v1.5.1.7/Vigor2960_v1.5.1.7.zip

• المصدر: ⚠️ https://github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/cases/DRV2960-0017-authenticated-app-guest-export-path-traversal-write-delete
• المستخدم: eqqie (UID 101441)
• ارسال: 20/10/2026 08:14 AM (26 أيام منذ)
• الاعتدال: 14/11/2026 07:12 PM (25 days later)
• الحالة: تمت الموافقة
• إدخال VulDB: 437462 [DrayTek Vigor2960 حتى 1.5.1.6 mainfunction.cgi app_guest_export filename اجتياز الدليل]
• النقاط: 20