# CVE-2022-20750: Cisco Redundancy Configuration Manager for Cisco StarOS Software TCP Denial of Service Vulnerability

> Unauthenticated remote attackers can cause a denial of service in Cisco RCM by sending malformed TCP data, requiring a software patch.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Feb 2022
- **Updated:** 6 Nov 2024
- **Also known as:** GHSA-xjx4-77rq-qjf8

## What is CVE-2022-20750?

CVE-2022-20750 is a medium-severity denial of service vulnerability in Cisco Redundancy Configuration Manager, published on 17 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the checkpoint manager implementation of Cisco Redundancy Configuration Manager (RCM) for Cisco StarOS Software could allow an unauthenticated, remote attacker to cause the checkpoint manager process to restart upon receipt of malformed TCP data. This vulnerability is due to improper input validation of an ingress TCP packet. An attacker could exploit this vulnerability by sending crafted TCP data to the affected application. A successful exploit could allow the attacker to cause a denial of service (DoS) condition due to the checkpoint manager process restarting.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-20750?

It affects 1 product.


Products: Cisco Redundancy Configuration Manager.

## How do I fix CVE-2022-20750?

No fix has been published for CVE-2022-20750 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-20750 being exploited?

There is no known exploitation of CVE-2022-20750 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-20750 and fix it if it is affected.

What it is: CVE-2022-20750 is a medium-severity denial of service vulnerability in Cisco Redundancy Configuration Manager, published on 17 Feb 2022. 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-2022-20750 in the wild and no public exploit code.

Affected product: Cisco Redundancy Configuration Manager. 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-2022-20750/ (Markdown: https://insights.sbomify.com/CVE-2022-20750/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-20750
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-20750
- OSV: https://osv.dev/vulnerability/CVE-2022-20750

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-20750/
Summaries are generated and may contain mistakes; the official description above is the record.