#VU41110 Input validation error in zephyr - CVE-2020-10068

Vulnerability identifier: #VU41110

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10068

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
zephyr
Other software / Other software solutions

Vendor: rutantan

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

In the Zephyr project Bluetooth subsystem, certain duplicate and back-to-back packets can cause incorrect behavior, resulting in a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions, and version 1.14.0 and later versions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

zephyr: 2.1.0

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External links
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10068
https://github.com/zephyrproject-rtos/zephyr/pull/23091
https://github.com/zephyrproject-rtos/zephyr/pull/23707
https://github.com/zephyrproject-rtos/zephyr/pull/23708
https://github.com/zephyrproject-rtos/zephyr/pull/23964
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-78

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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