CVE-2024-6443 zephyr: out-of-bound read in utf8_trunc
An out-of-bounds read in Zephyr RTOS utf8_trunc function can cause crashes or leak memory when processing empty strings.
- 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-2024-6443?
CVE-2024-6443 is a medium-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 4 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
Which versions are affected by CVE-2024-6443?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2024-6443?
No fix has been published for CVE-2024-6443 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-2024-6443 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-6443 exists.
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
Sources
Also known as GHSA-gg46-3rh2-v765, UBUNTU-CVE-2024-6443.