Vulnerability Monitor

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CVE-2015-7837

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.

Published

2017-09-19T16:29:00.230

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 5.5 (MEDIUM)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-254

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	7.2	Yes
Operating System	redhat	enterprise_linux	7.3	Yes
Operating System	redhat	enterprise_linux_desktop	7.0	Yes
Operating System	redhat	enterprise_linux_server_aus	7.3	Yes
Operating System	redhat	enterprise_linux_server_aus	7.4	Yes
Operating System	redhat	enterprise_linux_workstation	7.0	Yes
Operating System	redhat	enterprise_mrg	2.0	Yes
Operating System	redhat	kernel-rt	7.0	Yes

References

http://rhn.redhat.com/errata/RHSA-2015-2152.html Vendor Advisory ([email protected])
http://rhn.redhat.com/errata/RHSA-2015-2411.html Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2015/10/15/6 Mailing List, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/77097 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1272472 Issue Tracking, Vendor Advisory ([email protected])
https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798 Issue Tracking, Third Party Advisory ([email protected])
http://rhn.redhat.com/errata/RHSA-2015-2152.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2015-2411.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2015/10/15/6 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/77097 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1272472 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)