Vulnerability identifier: #VU34392

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-2020-10024

CWE-ID: CWE-697

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.

The arm platform-specific code uses a signed integer comparison when validating system call numbers. An attacker who has obtained code execution within a user thread is able to elevate privileges to that of the kernel. See NCC-ZEP-001 This issue affects: zephyrproject-rtos zephyr version 1.14.0 and later versions. version 2.1.0 and later versions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

zephyr: 1.14.2 - 2.1.0

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External links
http://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10024
http://github.com/zephyrproject-rtos/zephyr/pull/23323
http://github.com/zephyrproject-rtos/zephyr/pull/23498
http://github.com/zephyrproject-rtos/zephyr/pull/23535
http://zephyrprojectsec.atlassian.net/browse/ZEPSEC-30

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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.