#VU34392 Incorrect Comparison in zephyr - CVE-2020-10024
Published: May 12, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34392
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-10024
CWE-ID: CWE-697
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
zephyr
zephyr
Software vendor:
rutantan
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.
Remediation
Install update from vendor's website.
External links
- https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10024
- https://github.com/zephyrproject-rtos/zephyr/pull/23323
- https://github.com/zephyrproject-rtos/zephyr/pull/23498
- https://github.com/zephyrproject-rtos/zephyr/pull/23535
- https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-30