# CVE-2012-3895: Denial of service in n/a

> Remote authenticated users can crash Cisco IOS devices by sending a malicious MVPNv6 update, causing a denial of service.

- **Severity:** Medium 6.3 (`AV:N/AC:M/Au:S/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Sep 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-r9r3-j3f2-cx97

## What is CVE-2012-3895?

CVE-2012-3895 is a medium-severity denial of service vulnerability in Cisco Ios, published on 16 Sep 2012. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Cisco IOS 15.0 through 15.3 allows remote authenticated users to cause a denial of service (device crash) via an MVPNv6 update, aka Bug ID CSCty89224.

## Which versions are affected by CVE-2012-3895?

It affects 1 product.


Products: Cisco Ios.

## How do I fix CVE-2012-3895?

No fix has been published for CVE-2012-3895 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-3895 being exploited?

There is no known exploitation of CVE-2012-3895 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios

- [CVE-2017-12240](https://insights.sbomify.com/CVE-2017-12240/): Cisco IOS and IOS XE Software DHCP Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2017-3881](https://insights.sbomify.com/CVE-2017-3881/): Cisco IOS and IOS XE Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2018-0167](https://insights.sbomify.com/CVE-2018-0167/): Cisco IOS, XR, and XE Software Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2017-6736](https://insights.sbomify.com/CVE-2017-6736/): Cisco IOS and IOS XE Software SNMP Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2017-6737](https://insights.sbomify.com/CVE-2017-6737/): Cisco IOS and IOS XE Software SNMP Remote Code Execution (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-3895 and fix it if it is affected.

What it is: CVE-2012-3895 is a medium-severity denial of service vulnerability in Cisco Ios, published on 16 Sep 2012. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2012-3895 in the wild and no public exploit code.

Affected product: Cisco Ios. 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-2012-3895/ (Markdown: https://insights.sbomify.com/CVE-2012-3895/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-3895
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-3895
- OSV: https://osv.dev/vulnerability/CVE-2012-3895

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-3895/
Summaries are generated and may contain mistakes; the official description above is the record.