#VU54358 Out-of-bounds read in Contiki-NG - CVE-2021-21280

Vulnerability identifier: #VU54358

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21280

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing 6LoWPAN extension headers. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Contiki-NG: 2.0 - 4.5

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External links
https://github.com/contiki-ng/contiki-ng/pull/1409
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-r768-hrhf-v592

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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.