Bug 1485346 (CVE-2017-13693) - CVE-2017-13693 kernel: ACPI operand cache leak in dsutils.c
Summary: CVE-2017-13693 kernel: ACPI operand cache leak in dsutils.c
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-13693
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1485355 1485356 1488743 1488744 1488745 1488746 1488750
Blocks: 1485352
TreeView+ depends on / blocked
 
Reported: 2017-08-25 12:58 UTC by Adam Mariš
Modified: 2021-02-17 01:41 UTC (History)
53 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the kernel's ACPI interpreter when it does not flush the operand cache and causes a kernel stack dump. This allows local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism.
Clone Of:
Environment:
Last Closed: 2017-09-15 11:52:44 UTC
Embargoed:

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Description Adam Mariš 2017-08-25 12:58:56 UTC 
The acpi_ds_create_operands() function in drivers/acpi/acpica/dsutils.c
in the Linux kernel through 4.12.9 does not flush the operand cache and
causes a kernel stack dump, which allows local users to obtain
sensitive information from kernel memory and bypass the KASLR
protection mechanism (in the kernel through 4.9) via a crafted ACPI
table.

Upstream fix:

https://github.com/acpica/acpica/pull/295/commits/987a3b5cf7175916e2a4b6ea5b8e70f830dfe732
https://patchwork.kernel.org/patch/9919053/
Comment 1 Adam Mariš 2017-08-25 13:07:09 UTC 
Created acpica-tools tracking bugs for this issue:

Affects: fedora-all [bug 1485355]


Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1485356]
Comment 4 Wade Mealing 2017-09-06 07:56:20 UTC 
Statement:

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/

The Red Hat Security Response Team has rated this issue as having moderate security impact.

The risks associated with fixing this bug are greater than the moderate severity security risk. We therefore currently have no plans to fix this flaw in Red Hat Enterprise Linux 5,6,7 and Red Hat Enterprise MRG.
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