Opennds
CVE-2023-41101
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could write data beyond allocated buffer boundaries leading to code execution or crashes by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). 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
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). 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
NVD
CVE.org
EPSS
GitHub
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)NVD
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated critical severity (CVSS 9.8), this vulner
openNDS 10.2.0 is vulnerable to Use-After-Free via /openNDS/src/auth.c. Rated medium severity (CVSS 5.5), this vulnerabi
Unauthenticated OS command injection in openNDS before 11.0.0 allows any adjacent-network attacker - such as an unprivil
OS command injection in openNDS before 11.0.0 allows an authenticated captive portal user to execute arbitrary shell com
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. Rated high severity (CVSS 7.5), this vul
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated high severity (CVSS 7.5), this vulnerabil
An issue was discovered in OpenNDS Captive Portal before 10.1.2. Rated high severity (CVSS 7.5), this vulnerability is r
Heap-based buffer overflow in openNDS before 11.0.0 allows an unauthenticated attacker positioned on the captive portal
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. Rated medium severity (CVSS 6.5), this vulnerab
Memory exhaustion vulnerabilities in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal netwo
Exploit-DB