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TI-2023-21723 Aliases CVE-2023-41101GHSA-75j8-mr4c-4x59

An issue was discovered in the captive portal in OpenNDS before version 10.1.3.

Priority MEDIUM 53CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01888 79th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:opennds:opennds:*:*:*:*:*:*:*:*9.0.0 to before 10.1.3VulnerableopenNDS
  • cpe:2.3:a:opennds:opennds:*:*:*:*:*:*:*:* Versions 9.0.0 to before 10.1.3 Vulnerable ·openNDS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-41101
  2. 2026-10-03 Alias added: GHSA-75j8-mr4c-4x59

References

Patch 1

Other 3

  • TI-2023-19721 An issue was discovered in OpenNDS before 10.1.3. CVSS 3.1CRITICAL 9.8
  • TI-2023-19715 An issue was discovered in OpenNDS before 10.1.3. CVSS 3.1CRITICAL 9.8
  • TI-2023-19717 An issue was discovered in OpenNDS before 10.1.3. CVSS 3.1CRITICAL 9.8
  • TI-2023-19716 An issue was discovered in OpenNDS before 10.1.3. CVSS 3.1CRITICAL 9.8
  • TI-2023-21724 An issue was discovered in the captive portal in OpenNDS before version 10.1.3. CVSS 3.1HIGH 7.5
  • TI-2024-16946 openNDS 10.2.0 is vulnerable to Use-After-Free via /openNDS/src/auth.c. CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences