Vulnerability Details CVE-2021-21279
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 52.5%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 7.8
References
Products affected by CVE-2021-21279
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cpe:2.3:o:contiki-ng:contiki-ng:-
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cpe:2.3:o:contiki-ng:contiki-ng:2.0
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cpe:2.3:o:contiki-ng:contiki-ng:2.1
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cpe:2.3:o:contiki-ng:contiki-ng:2.2
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cpe:2.3:o:contiki-ng:contiki-ng:2.2.1
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cpe:2.3:o:contiki-ng:contiki-ng:2.2.2
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cpe:2.3:o:contiki-ng:contiki-ng:2.2.3
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cpe:2.3:o:contiki-ng:contiki-ng:2.3
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cpe:2.3:o:contiki-ng:contiki-ng:2.4
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cpe:2.3:o:contiki-ng:contiki-ng:2.5
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cpe:2.3:o:contiki-ng:contiki-ng:2.6
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cpe:2.3:o:contiki-ng:contiki-ng:2.7
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cpe:2.3:o:contiki-ng:contiki-ng:3.0
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cpe:2.3:o:contiki-ng:contiki-ng:4.0
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cpe:2.3:o:contiki-ng:contiki-ng:4.1
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cpe:2.3:o:contiki-ng:contiki-ng:4.2
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cpe:2.3:o:contiki-ng:contiki-ng:4.3
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cpe:2.3:o:contiki-ng:contiki-ng:4.4
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cpe:2.3:o:contiki-ng:contiki-ng:4.5