# CVE-2013-2779: Denial of service in n/a

> Remote attackers can cause a denial of service on Cisco ASR routers by sending fragmented IPv6 MVPN packets when the MLRE feature is enabled.

- **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:** 11 Apr 2013
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-42fj-5wgr-vp3x

## What is CVE-2013-2779?

CVE-2013-2779 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 11 Apr 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco IOS XE 3.4 before 3.4.5S, and 3.5 through 3.7 before 3.7.1S, on 1000 series Aggregation Services Routers (ASR) does not properly implement the Cisco Multicast Leaf Recycle Elimination (MLRE) feature, which allows remote attackers to cause a denial of service (card reload) via fragmented IPv6 MVPN (aka MVPNv6) packets, aka Bug ID CSCub34945, a different vulnerability than CVE-2013-1164.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2013-2779?

It affects 9 products.


Products: Cisco Asr 1001, Cisco Asr 1002, Cisco Asr 1002-X, Cisco Asr 1002 Fixed Router, Cisco Asr 1004, Cisco Asr 1006, Cisco Asr 1013, Cisco Asr 1023 Router, Cisco Ios Xe.

## How do I fix CVE-2013-2779?

No fix has been published for CVE-2013-2779 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-2779 being exploited?

There is no known exploitation of CVE-2013-2779 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xe

- [CVE-2013-5543](https://insights.sbomify.com/CVE-2013-5543/): Denial of service in n/a (high 7.8)
- [CVE-2013-5545](https://insights.sbomify.com/CVE-2013-5545/): Denial of service in n/a (high 7.8)
- [CVE-2013-5546](https://insights.sbomify.com/CVE-2013-5546/): Denial of service in n/a (high 7.8)
- [CVE-2013-5547](https://insights.sbomify.com/CVE-2013-5547/): Denial of service in n/a (high 7.8)
- [CVE-2013-1164](https://insights.sbomify.com/CVE-2013-1164/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-2779 and fix it if it is affected.

What it is: CVE-2013-2779 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 11 Apr 2013. 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-2013-2779 in the wild and no public exploit code.

Affected product: Cisco Ios Xe. 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-2013-2779/ (Markdown: https://insights.sbomify.com/CVE-2013-2779/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-2779
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-2779
- OSV: https://osv.dev/vulnerability/CVE-2013-2779

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From sbomify Insights: https://insights.sbomify.com/CVE-2013-2779/
Summaries are generated and may contain mistakes; the official description above is the record.