CVE-2023-38320 is a Denial-of-Service vulnerability affecting OpenNDS Captive Portal versions prior to 10.1.2. It stems from a NULL pointer dereference in the show_preauthpage function, triggered by a crafted GET HTTP request missing a User-Agent header, causing OpenNDS to crash. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity and no user interaction, leading to a complete loss of availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. The issue was patched in OpenNDS version 10.1.3 and subsequently in OpenWrt master, 23.05, and 22.03.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 10.1.2CPE matchmatch criteria | cpe:2.3:a:opennds:captive_portal:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.