Monday , January 22 2018
Home / Vulnerability / Vulnerability Pada Utilitas Wget FTP Symlink

Vulnerability Pada Utilitas Wget FTP Symlink

Aplikasi open source Wget yang paling banyak digunakan di linux dan unix untuk mengambil file dari web telah ditemukan vulnerability.

Wget adalah utilitas command line yang dirancang untuk mengambil file dari web menggunakan HTTP. FTP dan HTTPS yang paling banyak digunakan, Wget dapat dengan mudah diinstall pada sistem Unix dan telah support pada Windows, Mac OS X, Open VMS, MorphOS, dan Amiga OS.

Ketika sebuah direktori mengarah ke FTP server sebagai symbolic link. itu akan membuat seorang hacker dapat membuat file direktori dan symbolic links dengan kemauannya sendiri. ini dikarenakan terdapat cacat pada symlink.

Developer Vasyl Kaigorodov mengatakan bahwa wget telah ditemukan rentan terhadap symlink yang bisa membuat file sewenang-wenang, symbolic links dapat mengatur hak akses mereka ketika mengambil sebuah direktori secara rekursif melalui FTP.

Orang yang tidak berkepentingan dapat terhubung dengan korban melalui wget, yang memungkinkan hacker untuk melakukan apapun yang mereka inginkan. Wget dapat mendownload, membuat dan dapat menimpa file yang sudah ada pada komputer korban.

Vulnerability ini pertama kali dilaporkan pada proyek GNU Wget project by HD Moore, kepala kantor penelitian di Rapid7. Vulnerability ini di identifikasi sebagai CVE2014-4877. Sebuah cacat yang dianggap penting, karena wget ada pada hampir semua server linux di dunia.

Untuk mengatasi vulnerability ini, anda bisa mengupgrade wget anda ke versi terbaru yang sudah disediakan oleh developer dari wget.


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