CVE-2022-35926

Out-of-bounds read in IPv6 neighbor solicitation in Contiki-NG

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.08%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: contiki-ng contiki-ng
Published at:
Updated at:

References

Link Tags
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8 third party advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-4hpq-4f53-w386 third party advisory
https://github.com/contiki-ng/contiki-ng/pull/1654 third party advisory patch
https://github.com/contiki-ng/contiki-ng/pull/1654/commits/a4597001d50a04f4b9c78f323ba731e2f979802c third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-35926?
CVE-2022-35926 has been scored as a medium severity vulnerability.
How to fix CVE-2022-35926?
To fix CVE-2022-35926, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-35926 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-35926 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-35926?
CVE-2022-35926 affects contiki-ng contiki-ng.
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