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CVE-2017-7889

Date: April 16, 2017

The mm subsystem in the Linux kernel through 3.2 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.

Language: C

Severity Score

Related Resources (17)

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b8f254aa17f720053054c4ecff3920973a83b9d6
https://access.redhat.com/errata/RHSA-2018:1854
https://usn.ubuntu.com/3583-2/
http://www.securityfocus.com/bid/97690
https://usn.ubuntu.com/3583-1/
https://access.redhat.com/errata/RHSA-2017:2077
https://nvd.nist.gov/vuln/detail/CVE-2017-7889
https://access.redhat.com/errata/RHSA-2017:1842
https://security-tracker.debian.org/tracker/CVE-2017-7889
https://github.com/torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94
https://access.redhat.com/errata/RHSA-2017:2669
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-7889
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409de94
http://www.debian.org/security/2017/dsa-3945
http://www.openwall.com/lists/oss-security/2017/04/16/4
https://access.redhat.com/security/cve/CVE-2017-7889
https://www.mend.io/vulnerability-database/CVE-2017-7889

Severity Score

Weakness Type (CWE)

Improper Access Control

CWE-284

Incorrect Permission Assignment for Critical Resource

CWE-732

CVSS v3.1

Base Score:
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

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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