# CVE-2020-28041: Server-side request forgery in n/a

> Remote attackers can bypass NAT to access internal services via SIP ALG flaws when victims visit malicious sites, requiring firmware updates.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-9375-g7g5-p5fh

## What is CVE-2020-28041?

CVE-2020-28041 is a medium-severity server-side request forgery vulnerability in n/a, published on 1 Nov 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2020-28041?

It affects 1 product.


Products: Netgear Nighthawk R7000 Firmware.

## How do I fix CVE-2020-28041?

No fix has been published for CVE-2020-28041 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-28041 being exploited?

There is no known exploitation of CVE-2020-28041 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-28041 and fix it if it is affected.

What it is: CVE-2020-28041 is a medium-severity server-side request forgery vulnerability in n/a, published on 1 Nov 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-28041 in the wild and no public exploit code.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-28041/ (Markdown: https://insights.sbomify.com/CVE-2020-28041/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-28041
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-28041
- OSV: https://osv.dev/vulnerability/CVE-2020-28041

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-28041/
Summaries are generated and may contain mistakes; the official description above is the record.