Vulnerability CVE-2018-6412

Vulnerability Name:

CVE-2018-6412 (CCN-138494)

Assigned:

2018-01-30

Published:

2018-01-30

Updated:

2019-03-20

Summary:

In the function sbusfb_ioctl_helper() in drivers/video/fbdev/sbuslib.c in the Linux kernel through 4.15, an integer signedness error allows arbitrary information leakage for the FBIOPUTCMAP_SPARC and FBIOGETCMAP_SPARC commands.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-200

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2018-6412

Source: CONFIRM
Type: Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=250c6c49e3b68756b14983c076183568636e2bde

Source: CCN
Type: IBM Security Bulletin 716879 (PowerKVM)
Vulnerabilities in the Linux kernel affect PowerKVM

Source: XF
Type: UNKNOWN
linux-kernel-cve20186412-info-disc(138494)

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/250c6c49e3b68756b14983c076183568636e2bde

Source: CCN
Type: Linux Kernel Mailing List, 2018-01-30 20:30:42
Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper()

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://marc.info/?l=linux-fbdev&m=151734425901499&w=2

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-6412

Vulnerable Configuration:

Configuration 1:

cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.15)

Configuration CCN 1:

cpe:/o:linux:linux_kernel:4.15:-:*:*:*:*:*:*

AND

cpe:/a:ibm:powerkvm:3.1:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:201864120000000	V	CVE-2018-6412 on Ubuntu 16.04 LTS (xenial) - negligible.	2018-01-31
oval:com.ubuntu.artful:def:20186412000	V	CVE-2018-6412 on Ubuntu 17.10 (artful) - negligible.	2018-01-31
oval:com.ubuntu.xenial:def:20186412000	V	CVE-2018-6412 on Ubuntu 16.04 LTS (xenial) - negligible.	2018-01-31
oval:com.ubuntu.bionic:def:20186412000	V	CVE-2018-6412 on Ubuntu 18.04 LTS (bionic) - negligible.	2018-01-31
oval:com.ubuntu.cosmic:def:201864120000000	V	CVE-2018-6412 on Ubuntu 18.10 (cosmic) - negligible.	2018-01-31
oval:com.ubuntu.cosmic:def:20186412000	V	CVE-2018-6412 on Ubuntu 18.10 (cosmic) - negligible.	2018-01-31
oval:com.ubuntu.bionic:def:201864120000000	V	CVE-2018-6412 on Ubuntu 18.04 LTS (bionic) - negligible.	2018-01-31
oval:com.ubuntu.trusty:def:20186412000	V	CVE-2018-6412 on Ubuntu 14.04 LTS (trusty) - negligible.	2018-01-31

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