# CVE-2021-34691: Denial of service in n/a

> Remote unauthenticated attackers can disconnect valid user sessions in the RemotePC Linux client by connecting to an ephemeral port.

- **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:** 15 Jul 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-pf22-5278-8mrp

## What is CVE-2021-34691?

CVE-2021-34691 is a high-severity denial of service vulnerability in n/a, published on 15 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

iDrive RemotePC before 4.0.1 on Linux allows denial of service. A remote and unauthenticated attacker can disconnect a valid user session by connecting to an ephemeral port.

## Which versions are affected by CVE-2021-34691?

It affects 1 product.


Products: Idrive Remotepc.

## How do I fix CVE-2021-34691?

No fix has been published for CVE-2021-34691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34691 being exploited?

There is no known exploitation of CVE-2021-34691 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-34690](https://insights.sbomify.com/CVE-2021-34690/): Auth bypass in n/a (critical 9.8)
- [CVE-2021-34692](https://insights.sbomify.com/CVE-2021-34692/): Privilege escalation in n/a (high 7.8)
- [CVE-2021-34689](https://insights.sbomify.com/CVE-2021-34689/): Information disclosure in n/a (medium 5.5)
- [CVE-2021-34687](https://insights.sbomify.com/CVE-2021-34687/): Weak cryptography in n/a (medium 5.3)
- [CVE-2021-34688](https://insights.sbomify.com/CVE-2021-34688/): Hardcoded credentials in n/a (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34691 and fix it if it is affected.

What it is: CVE-2021-34691 is a high-severity denial of service vulnerability in n/a, published on 15 Jul 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-2021-34691 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-2021-34691/ (Markdown: https://insights.sbomify.com/CVE-2021-34691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34691
- OSV: https://osv.dev/vulnerability/CVE-2021-34691

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-34691/
Summaries are generated and may contain mistakes; the official description above is the record.