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Opennds CVE-2023-41102

HIGH
Memory Leak (CWE-401)
2023-11-17 cve@mitre.org
7.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Resource cleanup, leak prevention
Impact

CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

A remote attacker could exhaust available memory leading to denial of service by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 1.0% exploitation probability (EPSS)

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AnalysisAI

An issue was discovered in the captive portal in OpenNDS before version 10.1.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Memory Leak vulnerability could allow attackers to exhaust available memory leading to denial of service.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Ensure all allocated memory is properly freed. Use RAII patterns or garbage-collected languages.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Memory Leak (CWE-401), which allows attackers to exhaust available memory leading to denial of service. An issue was discovered in the captive portal in OpenNDS before version 10.1.3. It has multiple memory leaks due to not freeing up allocated memory. This may lead to a Denial-of-Service condition due to the consumption of all available memory. Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0. Affected products include: Opennds. Version information: version 10.1.3..

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

DescriptionNVD

An issue was discovered in the captive portal in OpenNDS before version 10.1.3. It has multiple memory leaks due to not freeing up allocated memory. This may lead to a Denial-of-Service condition due to the consumption of all available memory. Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.

Threat Intelligence Overview

EPSS Score
1.0%
Top 42% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 1.0%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:opennds:opennds:*:*:*:*:*:*:*:*
CVE-2023-41101 CRITICAL
9.8 Nov 17

An issue was discovered in the captive portal in OpenNDS before version 10.1.3. Rated critical severity (CVSS 9.8), this

CVE-2023-38316 CRITICAL
9.8 Nov 17

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated critical severity (CVSS 9.8), this vulner

CVE-2024-25763 MEDIUM POC
5.5 Feb 26

openNDS 10.2.0 is vulnerable to Use-After-Free via /openNDS/src/auth.c. Rated medium severity (CVSS 5.5), this vulnerabi

CVE-2026-38820 HIGH
8.3 Aug 28

Unauthenticated OS command injection in openNDS before 11.0.0 allows any adjacent-network attacker - such as an unprivil

CVE-2026-38822 HIGH
7.6 Aug 28

OS command injection in openNDS before 11.0.0 allows an authenticated captive portal user to execute arbitrary shell com

CVE-2023-38322 HIGH
7.5 Nov 17

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil

CVE-2023-38320 HIGH
7.5 Nov 17

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil

CVE-2023-38315 HIGH
7.5 Nov 17

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil

CVE-2023-38313 HIGH
7.5 Nov 17

An issue was discovered in OpenNDS Captive Portal before 10.1.2. Rated high severity (CVSS 7.5), this vulnerability is r

CVE-2026-38821 HIGH
7.1 Aug 28

Heap-based buffer overflow in openNDS before 11.0.0 allows an unauthenticated attacker positioned on the captive portal

CVE-2023-38314 MEDIUM
6.5 Nov 17

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated medium severity (CVSS 6.5), this vulnerab

CVE-2026-38819 MEDIUM
5.3 Aug 28

Memory exhaustion vulnerabilities in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal netwo

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