Vulnerability CVE-2017-14156

Vulnerability Name:

CVE-2017-14156 (CCN-131543)

Assigned:

2017-09-05

Published:

2017-09-05

Updated:

2018-03-16

Summary:

The atyfb_ioctl function in drivers/video/fbdev/aty/atyfb_base.c in the Linux kernel through 4.12.10 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory by reading locations associated with padding bytes.

CVSS v3 Severity:

5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:R)

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

4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:U/RC:R)

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

CVSS v2 Severity:

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

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

2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)

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

Vulnerability Type:

CWE-200

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2017-14156

Source: DEBIAN
Type: UNKNOWN
DSA-3981

Source: BID
Type: UNKNOWN
100634

Source: CCN
Type: BID-100634
Linux Kernel 'drivers/video/fbdev/aty/atyfb_base.c' Local Information Disclosure Vulnerability

Source: XF
Type: UNKNOWN
linux-kernel-cve201714156-info-disc(131543)

Source: CCN
Type: Torvalds GIT Repository
Update atyfb_base.c #441

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/pull/441

Source: MISC
Type: Mailing List, Patch, Third Party Advisory
https://marc.info/?l=linux-kernel&m=150401461613306&w=2

Source: MISC
Type: Mailing List, Patch, Third Party Advisory
https://marc.info/?l=linux-kernel&m=150453196710422&w=2

Source: UBUNTU
Type: UNKNOWN
USN-3583-1

Source: UBUNTU
Type: UNKNOWN
USN-3583-2

Vulnerable Configuration:

Configuration 1:

cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.12.10)

Configuration CCN 1:

cpe:/o:linux:linux_kernel:4.12.10:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.artful:def:201714156000	V	CVE-2017-14156 on Ubuntu 17.10 (artful) - medium.	2017-09-05
oval:com.ubuntu.bionic:def:2017141560000000	V	CVE-2017-14156 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-05
oval:com.ubuntu.bionic:def:201714156000	V	CVE-2017-14156 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-05
oval:com.ubuntu.xenial:def:2017141560000000	V	CVE-2017-14156 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-05
oval:com.ubuntu.trusty:def:201714156000	V	CVE-2017-14156 on Ubuntu 14.04 LTS (trusty) - medium.	2017-09-05
oval:com.ubuntu.xenial:def:201714156000	V	CVE-2017-14156 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-05

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