# CVE-2015-6279: Denial of service in n/a

> Remote attackers can cause a device reload via malformed IPv6 ND packets if IPv6 snooping 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:** 28 Sep 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-f4v7-w5wp-p585

## What is CVE-2015-6279?

CVE-2015-6279 is a high-severity denial of service vulnerability in Cisco Ios, published on 28 Sep 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S allows remote attackers to cause a denial of service (device reload) via a malformed ND packet with the Cryptographically Generated Address (CGA) option, aka Bug ID CSCuo04400.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-6279?

It affects 2 products.


Products: Cisco Ios, Cisco Ios Xe.

## How do I fix CVE-2015-6279?

No fix has been published for CVE-2015-6279 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-6279 being exploited?

There is no known exploitation of CVE-2015-6279 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-2015-6279 and fix it if it is affected.

What it is: CVE-2015-6279 is a high-severity denial of service vulnerability in Cisco Ios, published on 28 Sep 2015. 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-2015-6279 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-2015-6279/ (Markdown: https://insights.sbomify.com/CVE-2015-6279/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-6279
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-6279
- OSV: https://osv.dev/vulnerability/CVE-2015-6279

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From sbomify Insights: https://insights.sbomify.com/CVE-2015-6279/
Summaries are generated and may contain mistakes; the official description above is the record.