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Bug 1568821 - (CVE-2017-13167) CVE-2017-13167 kernel: sound: a race condition in the kernel sound timer in snd_timer_user_read()
CVE-2017-13167 kernel: sound: a race condition in the kernel sound timer in s...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160209,repor...
: Security
Depends On: 1568831 1288993 1568836
Blocks: 1568768
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Reported: 2018-04-18 05:44 EDT by Vladis Dronov
Modified: 2018-04-19 10:13 EDT (History)
29 users (show)

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Doc Text:
A race condition was found in the Linux kernel's sound timer code in the snd_timer_user_read() function in the sound/core/timer.c file. An unprivileged attacker can exploit the race condition to cause an out-of-bound access which may lead to a system crash or other unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
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Last Closed: 2018-04-18 06:18:38 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Vladis Dronov 2018-04-18 05:44:38 EDT 
A race condition was found in the kernel sound timer code in the snd_timer_user_read() function in the sound/core/timer.c file. An unprivileged attacker can exploit the race condition to cause out-of-bound access which may lead to a system crash or other unspecified impact.  Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

https://source.android.com/security/bulletin/pixel/2017-12-01#kernel-components

Upstream fixes:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3b1681375dc6e71d89a3ae00cc3ce9e775a8917

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4dff5c7b7093b19c19d3a100f8a3ad87cb7cd9e7
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