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Bug 1497745 - (CVE-2017-14954) CVE-2017-14954 kernel: Info leak in kernel_waitid()
CVE-2017-14954 kernel: Info leak in kernel_waitid()
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=20170929,reported=2...
: Security
Depends On: 1497747
Blocks: 1497757
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Reported: 2017-10-02 10:55 EDT by Adam Mariš
Modified: 2017-10-12 08:41 EDT (History)
47 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases. This can allow local users to obtain sensitive information and bypass the KASLR protection mechanism via a crafted system call.
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Environment:
Last Closed: 2017-10-11 10:34:13 EDT
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2017-10-02 10:55:48 EDT 
The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases, which allows local users to obtain sensitive information, and bypass the KASLR protection mechanism, via a crafted system call.

Upstream patch:

https://github.com/torvalds/linux/commit/6c85501f2fabcfc4fc6ed976543d252c4eaf4be9

Reproducer:

https://grsecurity.net/~spender/exploits/wait_for_kaslr_to_be_effective.c
Comment 1 Adam Mariš 2017-10-02 10:56:55 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1497747]
Comment 4 Vladis Dronov 2017-10-11 10:34:13 EDT 
Statement:

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