Vulnerability identifier: #VU34398

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10067

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
zephyr
Other software / Other software solutions

Vendor: rutantan

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

A malicious userspace application can cause a integer overflow and bypass security checks performed by system call handlers. The impact would depend on the underlying system call and can range from denial of service to information leak to memory corruption resulting in code execution within the kernel. See NCC-ZEP-005 This issue affects: zephyrproject-rtos zephyr version 1.14.1 and later versions. version 2.1.0 and later versions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

zephyr: 1.14.1 - 2.1.0

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External links
http://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10067
http://github.com/zephyrproject-rtos/zephyr/pull/23239
http://github.com/zephyrproject-rtos/zephyr/pull/23653
http://github.com/zephyrproject-rtos/zephyr/pull/23654
http://zephyrprojectsec.atlassian.net/browse/ZEPSEC-27

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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