---
cve: "CVE-2024-20421"
severity: "HIGH"
cvss: 7.1
epss: "0.2%"
vendor: "Cisco"
kev: false
exploited: false
published: "2024-10-16 17:15:14"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-11-04T23:40:52+01:00"
---

# CVE-2024-20421

> 7.1 HIGH

## Beschreibung

A vulnerability in the web-based management interface of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack and perform arbitrary actions on an affected device.

This vulnerability is due to insufficient CSRF protections for the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading a user to follow a crafted link. A successful exploit could allow the attacker to perform arbitrary actions on the affected device with the privileges of the targeted user.

## CNA-Record (Kanon, cvelistV5)

- CNA: **cisco**
- State: PUBLISHED
- Stand: 2024-10-31 13:49:46
- CNA-CVSS: **7.1** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Schwachstellen-Klasse

- **CWE-352** — Cross-Site Request Forgery
  The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

## Angriffsmuster (CAPEC)

- [CAPEC-62 — Cross Site Request Forgery](https://capec.mitre.org/data/definitions/62.html) _(Severity: Very High)_
- [CAPEC-111 — JSON Hijacking (aka JavaScript Hijacking)](https://capec.mitre.org/data/definitions/111.html) _(Severity: High)_
- [CAPEC-462 — Cross-Domain Search Timing](https://capec.mitre.org/data/definitions/462.html) _(Severity: Medium)_
- [CAPEC-467 — Cross Site Identification](https://capec.mitre.org/data/definitions/467.html) _(Severity: Low)_

## BSI-Hinweise (deutsch)

- [Cisco Analog Telephone Adaptor (ATA): Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2024-3223) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen im Cisco Analog Telephone Adaptor ATA 191 und ATA 192  ausnutzen, um seine Privilegien zu erhöhen, beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, einen Cross-Site-Scripting-Angriff durchzuführen oder einen Denial-of-Service-Zustand zu erzeugen.

## Referenzen

- <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multi-RDTEqRsy>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2024-20421/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_