CVE-2021-32771: Buffer overflow in contiki-ng
Contiki-NG is an open-source, cross-platform operating system for IoT devices. In affected versions it is possible to cause a buffer overflow when copying an IPv6 address prefix in the RPL-Classic implementation in Contiki-NG. In order to trigger the vulnerability, the Contiki-NG system must have joined an RPL DODAG. After that, an attacker can send a DAO packet with a Target option that contains a prefix length larger than 128 bits. The problem was fixed after the release of Contiki-NG 4.7. Users unable to upgrade may apply the patch in Contiki-NG PR #1615.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2021-32771?
CVE-2021-32771 is a vulnerability in the RPL-Classic implementation in Contiki-NG, which can cause a buffer overflow when copying an IPv6 address prefix.
What is the severity of CVE-2021-32771?
The severity of CVE-2021-32771 is high, with a CVSS score of 8.1.
How does CVE-2021-32771 affect Contiki-NG?
CVE-2021-32771 affects Contiki-NG versions up to and excluding 4.8.
Is there a fix available for CVE-2021-32771?
Yes, a fix for CVE-2021-32771 is available in Contiki-NG release v4.8.
What is the Common Weakness Enumeration (CWE) ID for CVE-2021-32771?
CVE-2021-32771 has CWE IDs 119 and 120.