CVE-2022-35926 Out-of-bounds read in IPv6 neighbor solicitation in Contiki-NG
Attackers can trigger an out-of-bounds read in IPv6 neighbor solicitation handling, potentially causing crashes or leaking memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-35926?
CVE-2022-35926 is a medium-severity memory corruption vulnerability in contiki-ng, published on 4 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Contiki-NG is an open-source, cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c, where memory read operations from the main packet buffer, <code>uip_buf</code>, are not checked if they go out of bounds. In particular, this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. The upcoming 4.8 release of Contiki-NG will include the patch.Users unable to upgrade may apply the patch in Contiki-NG PR #1654.
Weakness: CWE-125
Which versions are affected by CVE-2022-35926?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2022-35926?
No fix has been published for CVE-2022-35926 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-2022-35926 being exploited?
There is no known exploitation of CVE-2022-35926 in the wild and no public exploit code.
Other vulnerabilities in contiki-ng
Sources
Also known as GHSA-4hpq-4f53-w386.