Description
Improper verification of the source of a communication channel in the DNS resolver in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow remote third-party to insert a chosen address into the device's DNS cache via a forged DNS reply.
To remediate this issue, users should upgrade to version V4.4.2 and enable ipconfigDNS_CHECK_REPLY_SOURCE_IP.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRTOS | FreeRTOS-Plus-TCP | ≤ 4.4.1 | — |
References
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2 release-notes patch
- https://aws.amazon.com/security/security-bulletins/2026-139-aws/ vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-h4fw-pv82-p7h5 third-party-advisory