CVE-2023-50926

Unvalidated DIO prefix info length in RPL-Lite in Contiki-NG

Description

Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. More specifically, the prefix information of the DIO message contains a field that specifies the length of an IPv6 address prefix. The value of this field is not validated, which means that an attacker can set a value that is longer than the maximum prefix length. Subsequently, a memcmp function call that compares different prefixes can be called with a length argument that surpasses the boundary of the array allocated for the prefix, causing an out-of-bounds read. The problem has been patched in the "develop" branch of Contiki-NG, and is expected to be included in the next release. Users are advised to update as soon as they are able to or to manually apply the changes in Contiki-NG pull request #2721.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.34%
Vendor Advisory github.com
Affected: contiki-ng contiki-ng
Published at:
Updated at:

References

Link Tags
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-jp4p-fq85-jch2 vendor advisory
https://github.com/contiki-ng/contiki-ng/pull/2721 patch

Frequently Asked Questions

What is the severity of CVE-2023-50926?
CVE-2023-50926 has been scored as a high severity vulnerability.
How to fix CVE-2023-50926?
To fix CVE-2023-50926, 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-2023-50926 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-50926 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-2023-50926?
CVE-2023-50926 affects contiki-ng contiki-ng.
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