Bug 1485349 (CVE-2017-13695) - CVE-2017-13695 kernel: ACPI operand cache leak in nseval.c
Summary: CVE-2017-13695 kernel: ACPI operand cache leak in nseval.c
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-13695
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 1489283
Blocks: 1485354
TreeView+ depends on / blocked
 
Reported: 2017-08-25 13:00 UTC by Adam Mariš
Modified: 2019-09-29 14:19 UTC (History)
52 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's ACPI subsystem where a function 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 when using a specially crafted ACPI table.
Clone Of:
Environment:
Last Closed: 2017-09-15 11:58:48 UTC


Attachments (Terms of Use)

Description Adam Mariš 2017-08-25 13:00:04 UTC
The acpi_ns_evaluate() function in drivers/acpi/acpica/nseval.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/296/commits/37f2c716f2c6ab14c3ba557a539c3ee3224931b5
https://patchwork.kernel.org/patch/9850567/

Comment 1 Adam Mariš 2017-08-25 13:06:38 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 3 Wade Mealing 2017-09-08 02:53:33 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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