CVE-2021-21279CWE-835

Infinite loop in IPv6 neighbor solicitation processing

High · published June 18, 2021

CVSS v3.1
7.5
EPSS
1%
Percentile
61.8
In the wild
Unconfirmed
What it is

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In verions prior to 4.6, an attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages. This type of attack can effectively shut down the operation of the system because of the cooperative scheduling used for the main parts of Contiki-NG and its communication stack. 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
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00978 · 61.8th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2021-06-18T20:40Z
EPSS history
Timeline
  • 18 JUN 20:40Z
    Infinite loop in IPv6 neighbor solicitation processing
    cvelistv5