NULL pointer dereference in Opennds Captive Portal
CVE-2023-38320
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.
EPSS: 0.010 (57.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Opennds Captive_portal
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Release Notes, Vendor Advisory)
- cve@mitre.org
- cve@mitre.org
Frequently asked questions
- What is CVE-2023-38320?
- CVE-2023-38320 is a high-severity vulnerability in Opennds Captive Portal, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2023-11-17.
- How severe is CVE-2023-38320?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-38320 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.