An issue was discovered in OpenNDS Captive Portal before version 10.1.2.
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a NULL pointer dereference in preauthenticated() that can be triggered with a crafted GET HTTP request with a missing redirect query string parameter. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). Affected OpenNDS Captive Portal before version 10.1.2 fixed infixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on28. August 2023 by updating OpenNDS to version 10.1.3.
- Published
- Nov 17, 2023
- Updated
- Jun 17, 2026
- EPSS
- 0.9% · 59th percentile
- CWE
- CWE-476
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| opennds | captive portal | cpe:2.3:a:opennds:captive_portal |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- opennds captive portalbefore 10.1.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | opennds | all versions | — |
| Debian:13 | opennds | before 10.2.0+dfsg-1 | 10.2.0+dfsg-1 |
Same product
opennds: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-38316An issue was discovered in OpenNDS Captive Portal before version 10.1.2.39Monitor
- CVE-2023-38322An issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
- CVE-2023-38320An issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
- CVE-2023-38315An issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
- CVE-2023-38313An issue was discovered in OpenNDS Captive Portal before 10.1.2.30Monitor
- CVE-2023-38324An issue was discovered in OpenNDS before 10.1.2.21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:opennds | 10.2.0+dfsg-1 · Debian:13 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2023-383130 days apartAn issue was discovered in OpenNDS Captive Portal before 10.1.2.30Monitor
- CVE-2023-383150 days apartAn issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
- CVE-2023-383200 days apartAn issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
- CVE-2023-383220 days apartAn issue was discovered in OpenNDS Captive Portal before version 10.1.2.30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/openNDS/openNDS/releases/tag/v10.1.2
- github.com/openwrt/routing/commit/0b19771fb2dd81e7c428759610aed583171eed80
- source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006-v4/#sthash.2vJg3d85.rwx82g1C.dpbs
Vendor advisories and official records. Exploit/PoC links are deliberately left out.