CVE-2023-50926 Unvalidated DIO prefix info length in RPL-Lite in Contiki-NG
An attacker can trigger an out-of-bounds read in Contiki-NG via a malformed DIO message, potentially causing information disclosure or denial of service.
- 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-2023-50926?
CVE-2023-50926 is a high-severity memory corruption vulnerability in contiki-ng, published on 14 Feb 2024. 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 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.
Weakness: CWE-125
Which versions are affected by CVE-2023-50926?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2023-50926?
No fix has been published for CVE-2023-50926 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-2023-50926 being exploited?
There is no known exploitation of CVE-2023-50926 in the wild and no public exploit code.
Other vulnerabilities in contiki-ng
Sources
Also known as GHSA-jp4p-fq85-jch2.