# CVE-2019-1869: Cisco StarOS Denial of Service Vulnerability

> Unauthenticated remote attackers can cause a denial of service on Cisco StarOS virtual platforms by sending crafted packets, requiring manual device reload.

- **Severity:** High 8.6 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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:** 20 Jun 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-r863-66v2-rjq3

## What is CVE-2019-1869?

CVE-2019-1869 is a high-severity denial of service vulnerability in Cisco ASR 5000 Series Software, published on 20 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the internal packet-processing functionality of the Cisco StarOS operating system running on virtual platforms could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to a logic error that may occur under specific traffic conditions. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to prevent the targeted service interface from receiving any traffic, which would lead to a DoS condition on the affected interface. The device may have to be manually reloaded to recover from exploitation of this vulnerability.

Weakness: CWE-824 (Access of Uninitialized Pointer)

## Which versions are affected by CVE-2019-1869?

It affects 1 product.


Products: Cisco Staros.

## How do I fix CVE-2019-1869?

No fix has been published for CVE-2019-1869 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1869 being exploited?

There is no known exploitation of CVE-2019-1869 in the wild and no public exploit code.

## Other vulnerabilities in Cisco ASR 5000 Series Software

- [CVE-2023-20046](https://insights.sbomify.com/CVE-2023-20046/): Auth bypass in Cisco ASR 5000 Series Software (high 8.8)
- [CVE-2018-0369](https://insights.sbomify.com/CVE-2018-0369/): Denial of service in Cisco StarOS unknown (high 8.6)
- [CVE-2017-6707](https://insights.sbomify.com/CVE-2017-6707/): Command injection in Cisco StarOS (high 8.2)
- [CVE-2021-1539](https://insights.sbomify.com/CVE-2021-1539/): Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities (high 8.1)
- [CVE-2021-1540](https://insights.sbomify.com/CVE-2021-1540/): Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1869 and fix it if it is affected.

What it is: CVE-2019-1869 is a high-severity denial of service vulnerability in Cisco ASR 5000 Series Software, published on 20 Jun 2019. 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-2019-1869 in the wild and no public exploit code.

Affected product: Cisco ASR 5000 Series Software. 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-2019-1869/ (Markdown: https://insights.sbomify.com/CVE-2019-1869/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1869
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1869
- OSV: https://osv.dev/vulnerability/CVE-2019-1869

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1869/
Summaries are generated and may contain mistakes; the official description above is the record.