# CVE-2019-1712: Cisco IOS XR Software Protocol Independent Multicast Denial of Service Vulnerability

> Remote attackers can cause a denial of service by sending crafted AutoRP packets to Cisco IOS XR devices, requiring software upgrades to mitigate.

- **Severity:** Medium 5.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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 Apr 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-95fc-rj6v-4rhr

## What is CVE-2019-1712?

CVE-2019-1712 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 17 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the PIM process to restart, resulting in a denial of service condition on an affected device. The vulnerability is due to the incorrect processing of crafted AutoRP packets. An attacker could exploit this vulnerability by sending crafted packets to port UDP 496 on a reachable IP address on the device. A successful exploit could allow the attacker to cause the PIM process to restart. Software versions prior to 6.2.3, 6.3.2, 6.4.0, and 6.5.1 are affected.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-1712?

It affects 1 product.


Products: Cisco Ios Xr.

## How do I fix CVE-2019-1712?

No fix has been published for CVE-2019-1712 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1712 being exploited?

There is no known exploitation of CVE-2019-1712 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xr

- [CVE-2020-3118](https://insights.sbomify.com/CVE-2020-3118/): Cisco IOS XR Software Discovery Protocol Format String (high 8.8, exploited in the wild)
- [CVE-2020-3569](https://insights.sbomify.com/CVE-2020-3569/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2020-3566](https://insights.sbomify.com/CVE-2020-3566/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2010-3035](https://insights.sbomify.com/CVE-2010-3035/): Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service (high 7.5, exploited in the wild)
- [CVE-2022-20821](https://insights.sbomify.com/CVE-2022-20821/): Cisco IOS XR Open Port (medium 6.5, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1712 and fix it if it is affected.

What it is: CVE-2019-1712 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 17 Apr 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-2019-1712 in the wild and no public exploit code.

Affected product: Cisco Ios Xr. 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-2019-1712/ (Markdown: https://insights.sbomify.com/CVE-2019-1712/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1712
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1712
- OSV: https://osv.dev/vulnerability/CVE-2019-1712

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1712/
Summaries are generated and may contain mistakes; the official description above is the record.