#VU13041 Information disclosure in Linux kernel - CVE-2018-6412

Vulnerability identifier: #VU13041

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

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

---

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

---

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.