# CVE-2020-3143: Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS Software Path Traversal Vulnerability

> Authenticated attackers can read and write arbitrary files on Cisco TelePresence devices via directory traversal in the xAPI.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 23 Sep 2020
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-j55q-wc55-chv4

## What is CVE-2020-3143?

CVE-2020-3143 is a high-severity path traversal vulnerability in Cisco TelePresence TC Software, published on 23 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the video endpoint API (xAPI) of Cisco TelePresence Collaboration Endpoint (CE) Software, Cisco TelePresence Codec (TC) Software, and Cisco RoomOS Software could allow an authenticated, remote attacker to conduct directory traversal attacks on an affected device. The vulnerability is due to insufficient validation of user-supplied input to the xAPI of the affected software. An attacker could exploit this vulnerability by sending a crafted request to the xAPI. A successful exploit could allow the attacker to read and write arbitrary files in the system. To exploit this vulnerability, an attacker would need either an In-Room Control or administrator account.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2020-3143?

It affects 21 products.


Products: Cisco Ex60 Firmware, Cisco Ex90 Firmware, Cisco Sx10 Firmware, Cisco Sx20 Firmware, Cisco Sx80 Firmware, Cisco Telepresence Codec C40 Firmware, Cisco Telepresence Codec C60 Firmware, Cisco Telepresence Codec C90 Firmware, Cisco Telepresence Mx200 Firmware, Cisco Telepresence Mx300 Firmware, Cisco Telepresence Mx700 Firmware, Cisco Telepresence Mx800 Firmware, Cisco Webex Board 55 Firmware, Cisco Webex Board 55s Firmware, Cisco Webex Board 70 Firmware, Cisco Webex Board 70s Firmware, Cisco Webex Board 85s Firmware, Cisco Webex Dx70 Firmware, Cisco Webex Dx80 Firmware, Cisco Webex Room 55 Firmware and 1 more.

## How do I fix CVE-2020-3143?

No fix has been published for CVE-2020-3143 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3143 being exploited?

There is no known exploitation of CVE-2020-3143 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3143 and fix it if it is affected.

What it is: CVE-2020-3143 is a high-severity path traversal vulnerability in Cisco TelePresence TC Software, published on 23 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3143 in the wild and no public exploit code.

Affected product: Cisco TelePresence TC 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-2020-3143/ (Markdown: https://insights.sbomify.com/CVE-2020-3143/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3143
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3143
- OSV: https://osv.dev/vulnerability/CVE-2020-3143

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3143/
Summaries are generated and may contain mistakes; the official description above is the record.