# CVE-2019-1900: Cisco Integrated Management Controller Unauthenticated Denial of Service Vulnerability

> Unauthenticated remote attackers can crash the Cisco IMC web server via crafted HTTP requests, causing a denial of service.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Aug 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-7674-7g97-mwgj

## What is CVE-2019-1900?

CVE-2019-1900 is a high-severity vulnerability in Cisco Unified Computing System, published on 21 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web server of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to cause the web server process to crash, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient validation of user-supplied input on the web interface. An attacker could exploit this vulnerability by submitting a crafted HTTP request to certain endpoints of the affected software. A successful exploit could allow an attacker to cause the web server to crash. Physical access to the device may be required for a restart.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2019-1900?

It affects 2 products.


Products: Cisco Integrated Management Controller Supervisor, Cisco Unified Computing System.

## How do I fix CVE-2019-1900?

No fix has been published for CVE-2019-1900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1900 being exploited?

There is no known exploitation of CVE-2019-1900 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Unified Computing System

- [CVE-2019-1935](https://insights.sbomify.com/CVE-2019-1935/): Hardcoded credentials in Cisco Unified Computing System Director (critical 9.8)
- [CVE-2019-1937](https://insights.sbomify.com/CVE-2019-1937/): Auth bypass in Cisco Unified Computing System Director (critical 9.8)
- [CVE-2019-1974](https://insights.sbomify.com/CVE-2019-1974/): Auth bypass in Cisco Unified Computing System Director (critical 9.8)
- [CVE-2015-6259](https://insights.sbomify.com/CVE-2015-6259/): Path traversal in n/a (critical 9.4)
- [CVE-2019-1864](https://insights.sbomify.com/CVE-2019-1864/): Cisco Integrated Management Controller Command Injection Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1900 and fix it if it is affected.

What it is: CVE-2019-1900 is a high-severity vulnerability in Cisco Unified Computing System, published on 21 Aug 2019. 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-2019-1900 in the wild and no public exploit code.

Affected product: Cisco Unified Computing System. 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-2019-1900/ (Markdown: https://insights.sbomify.com/CVE-2019-1900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1900
- OSV: https://osv.dev/vulnerability/CVE-2019-1900

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1900/
Summaries are generated and may contain mistakes; the official description above is the record.