# CVE-2021-35392: Memory corruption in n/a

> Heap buffer overflow in Realtek Jungle SDK WiFi Simple Config server allows remote code execution or denial of service via crafted SSDP messages.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-93h2-q35g-wr7p

## What is CVE-2021-35392?

CVE-2021-35392 is a high-severity memory corruption vulnerability in n/a, published on 16 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a heap buffer overflow that is present due to unsafe crafting of SSDP NOTIFY messages from received M-SEARCH messages ST header.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-35392?

It affects 1 product.


Products: Realtek Rtl819x Jungle Software Development Kit.

## How do I fix CVE-2021-35392?

No fix has been published for CVE-2021-35392 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35392 being exploited?

There is no known exploitation of CVE-2021-35392 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-35394](https://insights.sbomify.com/CVE-2021-35394/): Realtek Jungle SDK Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2021-35395](https://insights.sbomify.com/CVE-2021-35395/): Realtek AP-Router SDK Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2021-35393](https://insights.sbomify.com/CVE-2021-35393/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35392 and fix it if it is affected.

What it is: CVE-2021-35392 is a high-severity memory corruption vulnerability in n/a, published on 16 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-35392 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-2021-35392/ (Markdown: https://insights.sbomify.com/CVE-2021-35392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35392
- OSV: https://osv.dev/vulnerability/CVE-2021-35392

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35392/
Summaries are generated and may contain mistakes; the official description above is the record.