#VU64436 Information disclosure in Linux kernel - CVE-2017-13695

Vulnerability identifier: #VU64436

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-13695

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists in the Linux kernel's ACPI subsystem where a function does not flush the operand cache and causes a kernel stack dump. A local user can pass a specially crafted ACPI table to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://www.securityfocus.com/bid/100497
https://github.com/acpica/acpica/pull/296/commits/37f2c716f2c6ab14c3ba557a539c3ee3224931b5
https://patchwork.kernel.org/patch/9850567/
https://bugzilla.redhat.com/show_bug.cgi?id=1485349

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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.