National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-7889 Detail

Current Description

The mm subsystem in the Linux kernel through 4.10.10 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c.

Source:  MITRE
Description Last Modified:  04/16/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 1.8

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

CVSS v2.0 Severity and Metrics:

Base Score: 7.2 HIGH
Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C) (V2 legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9

Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409de94 Issue Tracking Patch Third Party Advisory
http://www.debian.org/security/2017/dsa-3945
http://www.openwall.com/lists/oss-security/2017/04/16/4 Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/97690 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1842
https://access.redhat.com/errata/RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:2669
https://access.redhat.com/errata/RHSA-2018:1854
https://github.com/torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94 Issue Tracking Patch Third Party Advisory
https://usn.ubuntu.com/3583-1/
https://usn.ubuntu.com/3583-2/

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7889
NVD Published Date:
04/16/2017
NVD Last Modified:
06/19/2018