{"id":"CVE-2023-38320","aliases":["DEBIAN-CVE-2023-38320","EUVD-2023-42139","GHSA-2hmr-w3hv-h898"],"status":"published","title":"An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00956,"percentile":0.61675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2023-11-17T00:00:00Z","modified":"2026-10-28T02:30:59Z","fixes":[{"ecosystem":"Debian:13","package":"opennds","fixed_in":["10.2.0+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"opennds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.2.0+dfsg-1","10.3.0+dfsg-0.1","10.3.1+dfsg-1","9.10.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"opennds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.2.0+dfsg-1"}]}]}],"products":[{"vendor":"opennds","product":"captive_portal"}],"references":[{"url":"https://github.com/openNDS/openNDS/releases/tag/v10.1.2","tags":["x_transferred","Release Notes","Vendor Advisory","web"]},{"url":"https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006/#sthash.2vJg3d85.dpbs","tags":["x_transferred","web"]},{"url":"https://github.com/openwrt/routing/commit/0b19771fb2dd81e7c428759610aed583171eed80","tags":["x_transferred","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38320","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2hmr-w3hv-h898"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38320.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-38320","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-38320","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.","status":"published","published":"2023-11-17T00:00:00Z","modified":"2024-08-02T17:39:12.561Z","updated_at":"2026-11-02T14:35:29.772612Z"}],"euvd":[{"id":"EUVD-2023-42139","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.","status":"published","published":"2023-11-17T00:00:00Z","modified":"2024-08-02T17:39:12Z","updated_at":"2026-11-03T03:50:02.733403Z"}],"ghsa":[{"id":"GHSA-2hmr-w3hv-h898","title":"An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a...","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).","status":"published","published":"2023-11-17T06:31:21Z","modified":"2024-06-20T18:35:10Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:57:30.947324Z"}],"nvd":[{"id":"CVE-2023-38320","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.","status":"published","published":"2023-11-17T06:15:33.667Z","modified":"2026-06-17T06:09:54.28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:08:47.966245Z"}],"osv":[{"id":"DEBIAN-CVE-2023-38320","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.","status":"published","published":"2023-11-17T06:15:33.667Z","modified":"2026-10-26T18:02:30.302269866Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:39.980321Z"},{"id":"CVE-2023-38320","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.","status":"published","published":"2023-11-17T00:00:00Z","modified":"2026-10-28T02:30:59.925882765Z","updated_at":"2026-11-02T15:44:32.922049Z"}]}}