CVE-2022-39274 Buffer Overflow in `ProcessRadioRxDone` in LoRaMac-node
An attacker can trigger a buffer overflow in LoRaMac-node via crafted radio frames, potentially leading to remote code execution or denial of service.
- 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-2022-39274?
CVE-2022-39274 is a high-severity memory corruption vulnerability in Lora-net LoRaMac-node, published on 6 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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`.
Which versions are affected by CVE-2022-39274?
It affects 1 product.
Products include Semtech Loramac-Node.
How do I fix CVE-2022-39274?
No fix has been published for CVE-2022-39274 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-2022-39274 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-39274 exists.
Other vulnerabilities in Lora-net LoRaMac-node
Sources
Also known as GHSA-7vv8-73pc-63c2.