CVE-2024-38373 FreeRTOS-Plus-TCP Buffer Over-Read in DNS Response Parser
A buffer over-read in the FreeRTOS-Plus-TCP DNS parser allows attackers to cause crashes or leak memory via crafted DNS responses.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-38373?
CVE-2024-38373 is a critical memory corruption vulnerability in FreeRTOS-Plus-TCP, published on 24 Jun 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2024-38373?
It affects 1 product.
Products include Amazon Freertos-Plus-Tcp.
How do I fix CVE-2024-38373?
No fix has been published for CVE-2024-38373 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-38373 being exploited?
There is no known exploitation of CVE-2024-38373 in the wild and no public exploit code.
Other vulnerabilities in FreeRTOS-Plus-TCP
- CVE-2026-7424 Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP
- CVE-2026-7422 MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing
- CVE-2026-7426 Out-of-Bounds Write via Unsanitized Prefix Length in Router Advertisement Processing in FreeRTOS-Plus-TCP
- CVE-2026-7423 Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP
- CVE-2026-7425 Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP
Sources
Also known as GHSA-ppcp-rg65-58mv.