Lora-net LoRaMac-node up to 4.6.x ProcessRadioRxDone buffer overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in Lora-net LoRaMac-node up to 4.6.x. This affects the function ProcessRadioRxDone. Executing a manipulation can lead to buffer overflow. This vulnerability is registered as CVE-2022-39274. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Lora-net LoRaMac-node up to 4.6.x and classified as critical. This vulnerability affects the function ProcessRadioRxDone. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

LoRaMac-node is a reference implementation and documentation of a LoRa network node. Versions of LoRaMac-node prior to 4.7.0 are vulnerable to a buffer overflow. Improper size validation of the incoming radio frames can lead to an 65280-byte out-of-bounds write. The function `ProcessRadioRxDone` implicitly expects incoming radio frames to have at least a payload of one byte or more. An empty payload leads to a 1-byte out-of-bounds read of user controlled content when the payload buffer is reused. This allows an attacker to craft a FRAME_TYPE_PROPRIETARY frame with size -1 which results in an 65280-byte out-of-bounds memcopy likely with partially controlled attacker data. Corrupting a large part if the data section is likely to cause a DoS. If the large out-of-bounds write does not immediately crash the attacker may gain control over the execution due to now controlling large parts of the data section. Users are advised to upgrade either by updating their package or by manually applying the patch commit `e851b079`.

The weakness was published 10/06/2022 as GHSA-7vv8-73pc-63c2 (Website). The advisory is available at github.com. This vulnerability was named CVE-2022-39274. Technical details are known, but there is no available exploit.

Upgrading to version 4.7.0 eliminates this vulnerability.

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Productinfo

Vendor

• Lora-net

Name

• LoRaMac-node

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6

License

• open-source

Website

• Product: https://github.com/Lora-net/LoRaMac-node/

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