Vulnerability CVE-2017-5967

Vulnerability Name:

CVE-2017-5967 (CCN-122005)

Assigned:

2017-02-11

Published:

2017-02-11

Updated:

2017-03-07

Summary:

The time subsystem in the Linux kernel through 4.9.9, when CONFIG_TIMER_STATS is enabled, allows local users to discover real PID values (as distinguished from PID values inside a PID namespace) by reading the /proc/timer_list file, related to the print_timer function in kernel/time/timer_list.c and the __timer_stats_timer_set_start_info function in kernel/time/timer.c.

CVSS v3 Severity:

4.0 Medium (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 (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:O/RC:C)

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

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:O/RC:C)

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-2017-5967

Source: CCN
Type: Linux Kernel GIT Repository
time: Remove CONFIG_TIMER_STATS

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=dfb4357da6ddbdf57d583ba64361c9d792b0e0b1

Source: CCN
Type: IBM Security Bulletin 735387 (PowerKVM)
Vulnerabilities in the Linux Kernel affect PowerKVM

Source: BID
Type: UNKNOWN
96271

Source: MISC
Type: Issue Tracking
https://bugzilla.kernel.org/show_bug.cgi?id=193921

Source: XF
Type: UNKNOWN
linux-kernel-cve20175967-info-disc(122005)

Vulnerable Configuration:

Configuration 1:

cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.9.9)

Configuration CCN 1:

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

AND

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

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.bionic:def:201759670000000	V	CVE-2017-5967 on Ubuntu 18.04 LTS (bionic) - low.	2017-02-14
oval:com.ubuntu.artful:def:20175967000	V	CVE-2017-5967 on Ubuntu 17.10 (artful) - low.	2017-02-14
oval:com.ubuntu.trusty:def:20175967000	V	CVE-2017-5967 on Ubuntu 14.04 LTS (trusty) - low.	2017-02-14
oval:com.ubuntu.xenial:def:201759670000000	V	CVE-2017-5967 on Ubuntu 16.04 LTS (xenial) - low.	2017-02-14
oval:com.ubuntu.bionic:def:20175967000	V	CVE-2017-5967 on Ubuntu 18.04 LTS (bionic) - low.	2017-02-14
oval:com.ubuntu.xenial:def:20175967000	V	CVE-2017-5967 on Ubuntu 16.04 LTS (xenial) - low.	2017-02-14
oval:com.ubuntu.disco:def:201759670000000	V	CVE-2017-5967 on Ubuntu 19.04 (disco) - low.	2017-02-14
oval:com.ubuntu.cosmic:def:20175967000	V	CVE-2017-5967 on Ubuntu 18.10 (cosmic) - low.	2017-02-14
oval:com.ubuntu.cosmic:def:201759670000000	V	CVE-2017-5967 on Ubuntu 18.10 (cosmic) - low.	2017-02-14
oval:com.ubuntu.precise:def:20175967000	V	CVE-2017-5967 on Ubuntu 12.04 LTS (precise) - low.	2017-02-14

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