CVE-2018-11094

published 2018-05-15

CVE-2018-11094: An issue was discovered on Intelbras NCLOUD 300 1.0 devices. /cgi-bin/ExportSettings.sh, /goform/updateWPS, /goform/RebootSystem, and /goform/vpnBasicSettings…

Priority P2 74 critical 9.8 CVSS 3.0

AV N AC L PR N UI N S U C H I H A H

EXPLOIT

An issue was discovered on Intelbras NCLOUD 300 1.0 devices. /cgi-bin/ExportSettings.sh, /goform/updateWPS, /goform/RebootSystem, and /goform/vpnBasicSettings do not require authentication. For example, when an HTTP POST request is made to /cgi-bin/ExportSettings.sh, the username, password, and other details are retrieved.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
intelbras	ncloud_300_firmware	—	—

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

path /cgi-bin/ExportSettings.sh↗

path /goform/updateWPS↗

path /goform/RebootSystem↗

path /goform/vpnBasicSettings↗

command POST /cgi-bin/ExportSettings.sh body: Export=Salvar↗

other root:cary↗

filename NCLOUD_config.dat↗

• → Alert on unauthenticated POST requests to /goform/updateWPS, /goform/RebootSystem, or /goform/vpnBasicSettings — none of these endpoints enforce authentication on Intelbras NCLOUD 300 1.0. ↗
• → Monitor for Telnet (port 23) login attempts using the hardcoded credential pair root:cary on Intelbras NCLOUD 300 devices, as the exploit falls back to these after attempting credentials extracted from the config backup. ↗
• → Inspect HTTP response bodies from /cgi-bin/ExportSettings.sh for the string 'Login=' which indicates the plaintext credentials backup was successfully returned to an unauthenticated requester. ↗

• · The vulnerability affects only Intelbras NCLOUD 300 firmware version 1.0; the unauthenticated endpoints are specific to this version. ↗

CVSS provenance

nvd v3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

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