CVE-2018-1146

published 2018-04-19

CVE-2018-1146: A remote unauthenticated user can enable telnet on the Belkin N750 using firmware version 1.10.22 by sending a crafted HTTP request to set.cgi. When enabled…

Priority P2 60 high 7.5 CVSS 3.0

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

A remote unauthenticated user can enable telnet on the Belkin N750 using firmware version 1.10.22 by sending a crafted HTTP request to set.cgi. When enabled the telnet session requires no password and provides root access.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
belkin	n750_db_wi-fi_dual-band_n+_gigabit_router	—	—
belkin	n750_firmware	—	—

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

path set.cgi↗

• → Look for unauthenticated HTTP requests targeting set.cgi on Belkin N750 routers, which may be attempting to enable the telnet service remotely. ↗
• → Monitor for unexpected telnet service activation on Belkin N750 routers; successful exploitation results in a no-password root telnet session. ↗
• → Alert on any unauthenticated telnet connections to Belkin N750 F9K1103 v1 devices, as exploitation grants full administrator privileges. ↗

• · Vulnerability is confirmed only on Belkin N750 firmware version 1.10.22; no vendor patch has been released. ↗
• · No fix is available from the vendor; detection and network-level controls are the only mitigations. ↗

CVSS provenance

nvd v3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N

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