How severe is CVE-2024-38373?

CVE-2024-38373 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2024-38373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-38373?

CVE-2024-38373 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-38373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-38373 have an EU (EUVD) identifier?

Yes. CVE-2024-38373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37285.

When was CVE-2024-38373 published?

CVE-2024-38373 was published on 2024-06-24 and last updated on 2026-06-17.

CVE-2024-38373

CVE-2024-38373 is a critical-severity vulnerability in Amazon Freertos-plus-tcp with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37285
Weakness: CWE-125
Affected product: Amazon Freertos-plus-tcp
Published: 2024-06-24
Last modified: 2026-06-17

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.

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.
How severe is CVE-2024-38373?: CVE-2024-38373 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2024-38373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-38373?: CVE-2024-38373 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-38373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-38373 have an EU (EUVD) identifier?: Yes. CVE-2024-38373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37285.
When was CVE-2024-38373 published?: CVE-2024-38373 was published on 2024-06-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*

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