#VU11763 Improper access control in Linux kernel - CVE-2017-11472

Vulnerability identifier: #VU11763

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-11472

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local attacker to obtain potentially sensitive information and bypass security restrictions on the target system.

The weakness exists in the acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c due to it does not flush the operand cache and causes a kernel stack dump. A local attacker can submit a specially crafted ACPI table, gain access to potentially sensitive information from kernel memory and bypass the KASLR protection mechanism.

Mitigation
Update to version 4.12.

Vulnerable software versions

Linux kernel: 4.10.0 - 4.11.12

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External links
https://github.com/torvalds/linux/commit/3b2d69114fefa474fca542e51119036dceb4aa6f

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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.