# CVE-2011-2059: Information disclosure in n/a

> Remote attackers can fingerprint Cisco IOS devices and obtain sensitive information via crafted ICMPv6 packets.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Oct 2011
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-fgw3-96vm-6v7m

## What is CVE-2011-2059?

CVE-2011-2059 is a medium-severity vulnerability in Cisco Ios, published on 22 Oct 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ipv6 component in Cisco IOS before 15.1(4)M1.3 allows remote attackers to conduct fingerprinting attacks and obtain potentially sensitive information about the presence of the IOS operating system via an ICMPv6 Echo Request packet containing a Hop-by-Hop (HBH) extension header (EH) with a 0x0c01050c value in the PadN option data, aka Bug ID CSCtq02219.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2011-2059?

It affects 1 product.


Products: Cisco Ios.

## How do I fix CVE-2011-2059?

No fix has been published for CVE-2011-2059 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-2059 being exploited?

There is no known exploitation of CVE-2011-2059 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-2011-2059 and fix it if it is affected.

What it is: CVE-2011-2059 is a medium-severity vulnerability in Cisco Ios, published on 22 Oct 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-2011-2059 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-2011-2059/ (Markdown: https://insights.sbomify.com/CVE-2011-2059/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-2059
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-2059
- OSV: https://osv.dev/vulnerability/CVE-2011-2059

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-2059/
Summaries are generated and may contain mistakes; the official description above is the record.