Description
The file extension check in GNUBoard 3.40 and earlier only verifies extensions that contain all lowercase letters, which allows remote attackers to upload arbitrary files via file extensions that include uppercase letters.
References
- 20050103 STG Security Advisory: [SSA-20041224-21] File extensions mailing-list
- 13711 third-party-advisory
- 12149 vdb-entry
- gnuboard-gbupdate-file-upload(18729) vdb-entry