# CVE-2024-20497: Cisco Expressway Edge Improper Authorization Vulnerability

> Authenticated MRA users can bypass authorization to intercept calls or spoof caller IDs on Cisco Expressway Edge systems.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **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:** 4 Sep 2024
- **Updated:** 4 Sep 2024
- **Also known as:** GHSA-2vgj-5cmq-q6q3

## What is CVE-2024-20497?

CVE-2024-20497 is a medium-severity missing authorization vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 4 Sep 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in Cisco Expressway Edge (Expressway-E) could allow an authenticated, remote attacker to masquerade as another user on an affected system.

This vulnerability is due to inadequate authorization checks for Mobile and Remote Access (MRA) users. An attacker could exploit this vulnerability by running a series of crafted commands. A successful exploit could allow the attacker to intercept calls that are destined for a particular phone number or to make phone calls and have that phone number appear on the caller ID. To successfully exploit this vulnerability, the attacker must be an MRA user on an affected system.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2024-20497?

It affects 1 product.


Products: Cisco Expressway-E.

## How do I fix CVE-2024-20497?

No fix has been published for CVE-2024-20497 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-20497 being exploited?

There is no known exploitation of CVE-2024-20497 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-20497 and fix it if it is affected.

What it is: CVE-2024-20497 is a medium-severity missing authorization vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 4 Sep 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-20497 in the wild and no public exploit code.

Affected product: Cisco TelePresence Video Communication Server (VCS) Expressway. 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-2024-20497/ (Markdown: https://insights.sbomify.com/CVE-2024-20497/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-20497
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-20497
- OSV: https://osv.dev/vulnerability/CVE-2024-20497

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-20497/
Summaries are generated and may contain mistakes; the official description above is the record.