# CVE-2015-4195: Denial of service in n/a

> Remote authenticated users can cause a denial of service in Cisco IOS XR by sending a crafted disconnect action during an SSH session.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`)
- **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:** 19 Jun 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-3cv5-693m-8vg4

## What is CVE-2015-4195?

CVE-2015-4195 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 19 Jun 2015. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Cisco IOS XR 5.1.1.K9SEC allows remote authenticated users to cause a denial of service (vty error, and SSH and TELNET outage) via a crafted disconnect action within an SSH session, aka Bug ID CSCul63127.

Weakness: CWE-399

## Which versions are affected by CVE-2015-4195?

It affects 1 product.


Products: Cisco Ios Xr.

## How do I fix CVE-2015-4195?

No fix has been published for CVE-2015-4195 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-4195 being exploited?

There is no known exploitation of CVE-2015-4195 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-2015-4195 and fix it if it is affected.

What it is: CVE-2015-4195 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 19 Jun 2015. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-4195 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-2015-4195/ (Markdown: https://insights.sbomify.com/CVE-2015-4195/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-4195
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-4195
- OSV: https://osv.dev/vulnerability/CVE-2015-4195

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-4195/
Summaries are generated and may contain mistakes; the official description above is the record.