CVE-2021-3432 BT: Invalid interval in CONNECT_IND leads to Division by Zero
An attacker can cause a division by zero error in the Bluetooth stack, leading to a denial of service in Zephyr RTOS devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3432?
CVE-2021-3432 is a medium-severity denial of service vulnerability in Zephyrproject Zephyr, published on 28 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Invalid interval in CONNECT_IND leads to Division by Zero. Zephyr versions >= v1.14.0 Divide By Zero (CWE-369). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7364-p4wc-8mj4
Weakness: CWE-369
Which versions are affected by CVE-2021-3432?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2021-3432?
No fix has been published for CVE-2021-3432 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-3432 being exploited?
There is no known exploitation of CVE-2021-3432 in the wild and no public exploit code.
Other vulnerabilities in Zephyrproject Zephyr
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- CVE-2022-3806 Bluetooth HCI Error Handling Double Free
- CVE-2017-14199 Memory corruption in getaddrinfo
- CVE-2018-1000800 Null dereference in n/a
- CVE-2021-3329 DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer