CVE-2023-38320

HIGH
7.5
CVSS Score
Published: November 17, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 06:09 AM UTC
1 product affected across 1 vendorCaptive Portal

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 10.1.2
Affected range stops below 10.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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