Bug 1473214 - (CVE-2017-11472) CVE-2017-11472 kernel: ACPI operand cache leak in acpi_ns_terminate()
CVE-2017-11472 kernel: ACPI operand cache leak in acpi_ns_terminate()
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170426,reported=2...
: Security
Depends On: 1473215 1474278
Blocks: 1473216
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Reported: 2017-07-20 04:58 EDT by Adam Mariš
Modified: 2017-07-24 11:45 EDT (History)
36 users (show)

See Also:
Fixed In Version: kernel 4.12
Doc Type: If docs needed, set a value
Doc Text:
The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not flush the operand cache and causes a kernel stack dump. A local users could obtain sensitive information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a crafted ACPI table.
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Last Closed: 2017-07-24 05:55:41 EDT
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Description Adam Mariš 2017-07-20 04:58:24 EDT
The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 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.

References:

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-11472

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11472

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b2d69114fefa474fca542e51119036dceb4aa6f
Comment 1 Adam Mariš 2017-07-20 04:59:15 EDT
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1473215]
Comment 5 Vladis Dronov 2017-07-24 05:55:41 EDT
Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 as the code with the flaw is not present in the products listed.

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