Linux Kernel Copy-on-Write Memory Management Race Condition May Let Local Users Obtain Elevated Privileges
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SecurityTracker Alert ID: 1040020 |
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SecurityTracker URL: http://securitytracker.com/id/1040020
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CVE Reference:
CVE-2017-1000405
(Links to External Site)
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Date: Dec 18 2017
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Impact:
Denial of service via local system, User access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
A vulnerability was reported in the Linux kernel. A local user can obtain elevated privileges on the target system.
A local user can run a specially crafted application to trigger a race condition in copy-on-write of transparent huge pages and overwrite read-only huge pages to cause the target application to crash or to potentially gain elevated privileges on the target system.
[Editor's note: The vulnerability is due to an incomplete fix for CVE-2016-5195 (Alert ID 1037078).]
The original advisory is available at:
https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0
Eylon Ben Yaakov and Daniel Shapiro from Bindecy reported this vulnerability.
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Impact:
A local user can cause denial of service conditions on the target system.
A local user may be able to obtain elevated privileges on the target system.
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Solution:
The vendor has issued a source code fix, available at:
https://github.com/torvalds/linux/commit/a8f97366452ed491d13cf1e44241bc0b5740b1f0
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Vendor URL: www.kernel.org/ (Links to External Site)
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Cause:
Access control error, State error
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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[Original Message Not Available for Viewing]
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