CVE-2024-38373: freertos-plus-tcp Out-of-bounds Read

Description

FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the DNS Response Parser when parsing domain names in a DNS response. A carefully crafted DNS response with domain name length value greater than the actual domain name length, could cause the parser to read beyond the DNS response buffer. This issue affects applications using DNS functionality of the FreeRTOS-Plus-TCP stack. Applications that do not use DNS functionality are not affected, even when the DNS functionality is enabled. This vulnerability has been patched in version 4.1.1.

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CVSS v3.1 Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

Weakness Type (CWE)

CWE-126 CWE-126

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
amazon	freertos-plus-tcp	4.0.0 — 4.1.1

References

Advisories & Patches

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-ppcp-rg65-58mv https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-ppcp-rg65-58mv

Other References

https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.1.1 https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.1.1

Frequently Asked Questions

What is CVE-2024-38373? +

FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the DNS Response Parser when parsing domain names in a DNS response. A carefully crafted DNS response with domain name length value greater than the actual domain name length, could cause the parser to read beyond the DNS response buffer. This issue affects applications using DNS functionality of the FreeRTOS-Plus-TCP stack. Applications that do not use DNS functionality are not affected, even when the DNS functionality is enabled. This vulnerability has been patched in version 4.1.1. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2024-38373? +

CVE-2024-38373 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-38373? +

CVE-2024-38373 affects products from amazon, specifically: freertos-plus-tcp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-38373? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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