CVE-2021-21282: contiki-ng Classic Buffer Overflow

Vulnerability summary

CVE-2021-21282 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in contiki-ng. EPSS estimates a 0.99% chance of exploitation in the next 30 days, higher than 62.2% of scored vulnerabilities.

Timeline

1. 18-06-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In versions prior to 4.5, buffer overflow can be triggered by an input packet when using either of Contiki-NG's two RPL implementations in source-routing mode. The problem has been patched in Contiki-NG 4.5. Users can apply the patch for this vulnerability out-of-band as a workaround.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.