# CVE-2017-6790: Denial of service in TelePresence Video Communication Server (VCS)

> Unauthenticated remote attackers can cause a denial of service on Cisco TelePresence VCS by sending excessive SIP traffic.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/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:** 17 Aug 2017
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-mq47-xg5g-jxq9

## What is CVE-2017-6790?

CVE-2017-6790 is a medium-severity denial of service vulnerability in Cisco Systems, Inc. TelePresence Video Communication Server (VCS), published on 17 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Session Initiation Protocol (SIP) on the Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the targeted appliance. The vulnerability is due to excessive SIP traffic sent to the device. An attacker could exploit this vulnerability by transmitting large volumes of SIP traffic to the VCS. An exploit could allow the attacker to cause a complete DoS condition on the targeted system. Cisco Bug IDs: CSCve32897.

## Which versions are affected by CVE-2017-6790?

It affects 1 product.


Products: Cisco Telepresence Video Communication Server.

## How do I fix CVE-2017-6790?

No fix has been published for CVE-2017-6790 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-6790 being exploited?

There is no known exploitation of CVE-2017-6790 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Systems, Inc. TelePresence Video Communication Server (VCS)

- [CVE-2023-20105](https://insights.sbomify.com/CVE-2023-20105/): Privilege escalation in Cisco TelePresence Video Communication Server (VCS) Expressway (critical 9.6)
- [CVE-2023-20192](https://insights.sbomify.com/CVE-2023-20192/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Privilege Escalation Vulnerabilities (critical 9.6)
- [CVE-2022-20754](https://insights.sbomify.com/CVE-2022-20754/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2022-20755](https://insights.sbomify.com/CVE-2022-20755/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2016-1468](https://insights.sbomify.com/CVE-2016-1468/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-6790 and fix it if it is affected.

What it is: CVE-2017-6790 is a medium-severity denial of service vulnerability in Cisco Systems, Inc. TelePresence Video Communication Server (VCS), published on 17 Aug 2017. 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-2017-6790 in the wild and no public exploit code.

Affected product: Cisco Systems, Inc. TelePresence Video Communication Server (VCS). 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-2017-6790/ (Markdown: https://insights.sbomify.com/CVE-2017-6790/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6790
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6790
- OSV: https://osv.dev/vulnerability/CVE-2017-6790

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-6790/
Summaries are generated and may contain mistakes; the official description above is the record.