CVE-2021-20134

Katalog CVE

CVSS 8.4 · High EPSS 7,5%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada dlink dir-2640-us firmware. Skor CVSS 3.1 8.4 (High) menurut NVD.

Deskripsi (NVD)

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 are affected by an absolute path traversal vulnerability that allows a remote, authenticated attacker to set an arbitrary file on the router's filesystem as the log file used by either Quagga service (zebra or ripd). Subsequent log messages will be appended to the file, prefixed by a timestamp and some logging metadata. Remote code execution can be achieved by using this vulnerability to append to a shell script on the router's filesystem, and then awaiting or triggering the execution of that script. A remote, unauthenticated root shell can easily be obtained on the device in this fashion.

Rincian

Terbit di NVD

30 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.4 (High), sumber NVD
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

7,5% peluang dieksploitasi; lebih tinggi dari 94,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.tenable.com/security/research/tra-2021-44 exploit · advisory pihak ketiga