# CVE-2023-20088: Cisco Finesse Reverse Proxy VPN-less Access to Finesse Desktop Denial of Service Vulnerability

> Unauthenticated remote attackers can cause a denial of service in Cisco Finesse by exploiting improper IP filtering in the VPN-less reverse proxy configuration.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Mar 2023
- **Updated:** 28 Oct 2024
- **Also known as:** GHSA-6v2h-cxg9-wpjg

## What is CVE-2023-20088?

CVE-2023-20088 is a medium-severity denial of service vulnerability in Cisco Unified Contact Center Enterprise, published on 3 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the nginx configurations that are provided as part of the VPN-less reverse proxy for Cisco Finesse could allow an unauthenticated, remote attacker to create a denial of service (DoS) condition for new and existing users who are connected through a load balancer. This vulnerability is due to improper IP address filtering by the reverse proxy. An attacker could exploit this vulnerability by sending a series of unauthenticated requests to the reverse proxy. A successful exploit could allow the attacker to cause all current traffic and subsequent requests to the reverse proxy through a load balancer to be dropped, resulting in a DoS condition.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2023-20088?

It affects 1 product.


Products: Cisco Finesse.

## How do I fix CVE-2023-20088?

No fix has been published for CVE-2023-20088 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20088 being exploited?

There is no known exploitation of CVE-2023-20088 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Unified Contact Center Enterprise

- [CVE-2018-0398](https://insights.sbomify.com/CVE-2018-0398/): Server-side request forgery in Cisco Finesse unknown (critical 9.8)
- [CVE-2018-0399](https://insights.sbomify.com/CVE-2018-0399/): Information disclosure in Cisco Finesse unknown (critical 9.8)
- [CVE-2016-6442](https://insights.sbomify.com/CVE-2016-6442/): Cross-site request forgery in Cisco Finesse 11.0(1) (high 8.8)
- [CVE-2016-1373](https://insights.sbomify.com/CVE-2016-1373/): Server-side request forgery in n/a (high 8.6)
- [CVE-2015-0754](https://insights.sbomify.com/CVE-2015-0754/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20088 and fix it if it is affected.

What it is: CVE-2023-20088 is a medium-severity denial of service vulnerability in Cisco Unified Contact Center Enterprise, published on 3 Mar 2023. 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-2023-20088 in the wild and no public exploit code.

Affected product: Cisco Unified Contact Center Enterprise. 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-2023-20088/ (Markdown: https://insights.sbomify.com/CVE-2023-20088/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20088
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20088
- OSV: https://osv.dev/vulnerability/CVE-2023-20088

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20088/
Summaries are generated and may contain mistakes; the official description above is the record.