cbcvebase.
CVE-2019-8985
published 2019-02-21

CVE-2019-8985: On Netis WF2411 with firmware 2.1.36123 and other Netis WF2xxx devices (possibly WF2411 through WF2880), there is a stack-based buffer overflow that does not…

PriorityP269critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EXPLOIT
EPSS
13.30%
95.9th percentile
On Netis WF2411 with firmware 2.1.36123 and other Netis WF2xxx devices (possibly WF2411 through WF2880), there is a stack-based buffer overflow that does not require authentication. This can cause denial of service (device restart) or remote code execution. This vulnerability can be triggered by a GET request with a long HTTP "Authorization: Basic" header that is mishandled by user_auth->user_ok in /bin/boa.

Affected

2 ranges
VendorProductVersion rangeFixed in
netis-systemswf2411_firmware——
netis-systemswf2880_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/bin/boa↗
path/login.htm
otherAuthorization: Basic <long header>↗
  • →Detect Netis router login panel by issuing a GET request to /login.htm and checking for 'AP setup' in the response body and 'Server: netis' in the response header with HTTP 200 status.
  • →Exploit traffic is a GET request with an abnormally long 'Authorization: Basic' HTTP header targeting the /bin/boa web server process; monitor for oversized Authorization headers on Netis WF2xxx devices. ↗
  • ·Vulnerability affects Netis WF2411 firmware 2.1.36123 and potentially all WF2xxx devices (WF2411 through WF2880); exact firmware range for other models is unconfirmed. ↗
  • ·No authentication is required to trigger the stack-based buffer overflow, meaning the attack surface is exposed to unauthenticated network attackers. ↗

CVSS provenance

nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.09.0CRITICALAV:N/AC:L/Au:N/C:P/I:P/A:C
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