# CVE-2019-15276: Cisco Wireless LAN Controller HTTP Parsing Engine Denial of Service Vulnerability

> A remote attacker can cause a denial of service on Cisco Wireless LAN Controllers by submitting crafted URLs to the web interface.

- **Severity:** High 7.7 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H`)
- **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:** 26 Nov 2019
- **Updated:** 21 Nov 2024
- **Also known as:** GHSA-6fp6-hh92-h5q5

## What is CVE-2019-15276?

CVE-2019-15276 is a high-severity denial of service vulnerability in Cisco Wireless Lan Controller Software, published on 26 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the web interface of Cisco Wireless LAN Controller Software could allow a low-privileged, authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists due to a failure of the HTTP parsing engine to handle specially crafted URLs. An attacker could exploit this vulnerability by authenticating with low privileges to an affected controller and submitting the crafted URL to the web interface of the affected device. Conversely, an unauthenticated attacker could exploit this vulnerability by persuading a user of the web interface to click the crafted URL. A successful exploit could allow the attacker to cause an unexpected restart of the device, resulting in a DoS condition.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-15276?

It affects 1 product.


Products: Cisco Wireless Lan Controller Software.

## How do I fix CVE-2019-15276?

No fix has been published for CVE-2019-15276 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-15276 being exploited?

There is no known exploitation of CVE-2019-15276 in the wild and no public exploit code.

Public exploit code:

- Cisco WLC 2504 8.9 - Denial of Service (PoC) (exploitdb)

## Other vulnerabilities in Cisco Wireless Lan Controller Software

- [CVE-2007-2036](https://insights.sbomify.com/CVE-2007-2036/): Hardcoded credentials in n/a (critical 10.0)
- [CVE-2016-1363](https://insights.sbomify.com/CVE-2016-1363/): Memory corruption in n/a (critical 9.8)
- [CVE-2015-6314](https://insights.sbomify.com/CVE-2015-6314/): Auth bypass in n/a (critical 9.8)
- [CVE-2010-2842](https://insights.sbomify.com/CVE-2010-2842/): Privilege escalation in n/a (critical 9.0)
- [CVE-2010-2843](https://insights.sbomify.com/CVE-2010-2843/): Privilege escalation in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15276 and fix it if it is affected.

What it is: CVE-2019-15276 is a high-severity denial of service vulnerability in Cisco Wireless Lan Controller Software, published on 26 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-15276 in the wild and no public exploit code.

Affected product: Cisco Wireless Lan Controller Software. 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-2019-15276/ (Markdown: https://insights.sbomify.com/CVE-2019-15276/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15276
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15276
- OSV: https://osv.dev/vulnerability/CVE-2019-15276

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15276/
Summaries are generated and may contain mistakes; the official description above is the record.