CVE-2021-21281CWE-120

Buffer overflow due to unvalidated TCP data offset

High · published June 18, 2021

CVSS v3.1
7.0
EPSS
1%
Percentile
59.9
In the wild
Unconfirmed
What it is

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. A buffer overflow vulnerability exists in Contiki-NG versions prior to 4.6. After establishing a TCP socket using the tcp-socket library, it is possible for the remote end to send a packet with a data offset that is unvalidated. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00918 · 59.9th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2021-06-18T20:25Z
EPSS history
Timeline
  • 18 JUN 20:25Z
    Buffer overflow due to unvalidated TCP data offset
    cvelistv5