CVE-2015-7837

medium

Description

The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot.

References

https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798

https://bugzilla.redhat.com/show_bug.cgi?id=1272472

http://www.openwall.com/lists/oss-security/2015/10/15/6

http://rhn.redhat.com/errata/RHSA-2015-2411.html

http://rhn.redhat.com/errata/RHSA-2015-2152.html

http://www.securityfocus.com/bid/77097

Details

Source: MITRE

Published: 2017-09-19

Updated: 2017-10-05

Type: CWE-254

Risk Information

CVSS v2

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM