# CVE-2017-3882: Memory corruption in Cisco CVR100W Wireless-N VPN Router

> Unauthenticated attackers can execute arbitrary code with root privileges or cause denial of service via buffer overflow in UPnP implementation.

- **Severity:** Critical 9.6 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-vxgv-678v-vchx

## What is CVE-2017-3882?

CVE-2017-3882 is a critical memory corruption vulnerability in Cisco CVR100W Wireless-N VPN Router, published on 16 May 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the Universal Plug-and-Play (UPnP) implementation in the Cisco CVR100W Wireless-N VPN Router could allow an unauthenticated, Layer 2-adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition. The remote code execution could occur with root privileges. The vulnerability is due to incomplete range checks of the UPnP input data, which could result in a buffer overflow. An attacker could exploit this vulnerability by sending a malicious request to the UPnP listening port of the targeted device. An exploit could allow the attacker to cause the device to reload or potentially execute arbitrary code with root privileges. This vulnerability affects all firmware releases of the Cisco CVR100W Wireless-N VPN Router prior to Firmware Release 1.0.1.22. Cisco Bug IDs: CSCuz72642.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-3882?

It affects 2 products.


Products: Cisco Small Business Rv Router Firmware, Cisco Small Business Rv Router Firmware 1.0.

## How do I fix CVE-2017-3882?

No fix has been published for CVE-2017-3882 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-3882 being exploited?

There is no known exploitation of CVE-2017-3882 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3882 and fix it if it is affected.

What it is: CVE-2017-3882 is a critical memory corruption vulnerability in Cisco CVR100W Wireless-N VPN Router, published on 16 May 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-3882 in the wild and no public exploit code.

Affected product: Cisco CVR100W Wireless-N VPN Router. 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-2017-3882/ (Markdown: https://insights.sbomify.com/CVE-2017-3882/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3882
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3882
- OSV: https://osv.dev/vulnerability/CVE-2017-3882

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-3882/
Summaries are generated and may contain mistakes; the official description above is the record.