# CVE-2020-3155: Cisco Intelligent Proximity SSL Certificate Validation Vulnerability

> An attacker can intercept and modify shared content or access call controls on Cisco collaboration endpoints via a man-in-the-middle attack due to missing SSL certificate validation.

- **Severity:** High 7.4 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Mar 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-qv54-r855-f5j8

## What is CVE-2020-3155?

CVE-2020-3155 is a high-severity vulnerability in Cisco Webex Meetings, published on 4 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the SSL implementation of the Cisco Intelligent Proximity solution could allow an unauthenticated, remote attacker to view or alter information shared on Cisco Webex video devices and Cisco collaboration endpoints if the products meet the conditions described in the Vulnerable Products section. The vulnerability is due to a lack of validation of the SSL server certificate received when establishing a connection to a Cisco Webex video device or a Cisco collaboration endpoint. An attacker could exploit this vulnerability by using man in the middle (MITM) techniques to intercept the traffic between the affected client and an endpoint, and then using a forged certificate to impersonate the endpoint. Depending on the configuration of the endpoint, an exploit could allow the attacker to view presentation content shared on it, modify any content being presented by the victim, or have access to call controls. This vulnerability does not affect cloud registered collaboration endpoints.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2020-3155?

It affects 8 products.


Products: Cisco Intelligence Proximity, Cisco Jabber, Cisco Meeting, Cisco Telepresence Codec C40 Firmware, Cisco Telepresence Codec C60 Firmware, Cisco Telepresence Codec C90 Firmware, Cisco Webex Meetings, Cisco Webex Teams.

## How do I fix CVE-2020-3155?

No fix has been published for CVE-2020-3155 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3155 being exploited?

There is no known exploitation of CVE-2020-3155 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3155 and fix it if it is affected.

What it is: CVE-2020-3155 is a high-severity vulnerability in Cisco Webex Meetings, published on 4 Mar 2020. 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-2020-3155 in the wild and no public exploit code.

Affected product: Cisco Webex Meetings. 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-2020-3155/ (Markdown: https://insights.sbomify.com/CVE-2020-3155/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3155
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3155
- OSV: https://osv.dev/vulnerability/CVE-2020-3155

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3155/
Summaries are generated and may contain mistakes; the official description above is the record.