# CVE-2011-1651: Denial of service in n/a

> Remote attackers can cause a device reload via crafted IPv4 packets on Cisco IOS XR systems with SPA interface processors installed.

- **Severity:** High 7.8 (`AV:N/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 May 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-cr78-h7qp-5hm4

## What is CVE-2011-1651?

CVE-2011-1651 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 31 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco IOS XR 3.9.x and 4.0.x before 4.0.3 and 4.1.x before 4.1.1, when an SPA interface processor is installed, allows remote attackers to cause a denial of service (device reload) via a crafted IPv4 packet, aka Bug ID CSCto45095.

Weakness: CWE-399

## Which versions are affected by CVE-2011-1651?

It affects 1 product.


Products: Cisco Ios Xr.

## How do I fix CVE-2011-1651?

No fix has been published for CVE-2011-1651 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-1651 being exploited?

There is no known exploitation of CVE-2011-1651 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-2011-1651 and fix it if it is affected.

What it is: CVE-2011-1651 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 31 May 2011. 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-2011-1651 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-2011-1651/ (Markdown: https://insights.sbomify.com/CVE-2011-1651/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1651
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1651
- OSV: https://osv.dev/vulnerability/CVE-2011-1651

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1651/
Summaries are generated and may contain mistakes; the official description above is the record.