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CVE-2018-18397

CVSS v3.0 5.5 (Medium)
55% Progress
CVSS v2.0 2.1 (Low)
21% Progress
EPSS 0.04 % (11th)
0.04% Progress
Affected Products 10
Advisories 13
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.

Weaknesses
CWE-863
Incorrect Authorization
CVE Status
PUBLISHED
CNA
MITRE
Published Date
2018-12-12 10:29:00
(5 years ago)
Updated Date
2020-08-24 17:37:01
(4 years ago)

Affected Products

Canonical

Linux

Redhat

Configuration #1

    CPE23 From Up To
  Linux Kernel prior 4.19.7 version cpe:2.3:o:linux:linux_kernel < 4.19.7

Configuration #2

    CPE23 From Up To
  Redhat Openshift Container Platform 3.11 cpe:2.3:a:redhat:openshift_container_platform:3.11
  Redhat Virtualization Host 4.0 cpe:2.3:a:redhat:virtualization_host:4.0
  Redhat Enterprise Linux Desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
  Redhat Enterprise Linux Server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0
  Redhat Enterprise Linux Server Aus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4
  Redhat Enterprise Linux Server Aus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6
  Redhat Enterprise Linux Server Eus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4
  Redhat Enterprise Linux Server Eus 7.5 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5
  Redhat Enterprise Linux Server Eus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6
  Redhat Enterprise Linux Server Tus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4
  Redhat Enterprise Linux Server Tus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6
  Redhat Enterprise Linux Workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0

Configuration #3

    CPE23 From Up To
  Canonical Ubuntu Linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts
  Canonical Ubuntu Linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts
  Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts
  Canonical Ubuntu Linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10