Description
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a show_preauthpage NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing User-Agent header. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). This problem was fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
References (3)
Core 3
Core References
Release Notes, Vendor Advisory
https://github.com/openNDS/openNDS/releases/tag/v10.1.2
Scores
CVSS v3
7.5
EPSS
0.0059
EPSS Percentile
69.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (1)
opennds/captive_portal
< 10.1.2
Published
Nov 17, 2023
Tracked Since
Feb 18, 2026