Vulnerability identifier: #VU13041

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-6412

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

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

Vendor: Linux Foundation

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to integer signedness error in the sbusfb_ioctl_helper function in drivers/video/fbdev/sbuslib.c. A remote attacker can use vector related to the FBIOPUTCMAP_SPARC and FBIOGETCMAP_SPARC commands to access arbitrary data.

Mitigation
The vulnerability is addressed in the following versions: 4.4.134, 4.9.104, 4.14.45.

Vulnerable software versions

Linux kernel: 4.4.0 - 4.4.134, 4.9 - 4.9.103, 4.14 - 4.14.44, 3.14.9, 3.4.90 - 3.4.99, 2.4.9

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External links
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.134
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.104
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.45

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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