Vulnerability identifier: #VU54354

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21281

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Contiki-NG
Other software / Other software solutions

Vendor: Contiki-NG

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper validation of TCP data offset. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Contiki-NG: 2.0 - 4.5

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External links
http://github.com/contiki-ng/contiki-ng/pull/1366
http://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mc42-fqfr-h9fp

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.