CVE-2015-7837 Information

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.

CVSS Vector

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

Reference

http://rhn.redhat.com/errata/RHSA-2015-2152.html http://rhn.redhat.com/errata/RHSA-2015-2411.html http://www.openwall.com/lists/oss-security/2015/10/15/6 http://www.securityfocus.com/bid/77097 https://bugzilla.redhat.com/show_bug.cgi?id=1272472 https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.5