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Bug 1428485 - (CVE-2017-6345) CVE-2017-6345 kernel: llc: skb->sk set without skb->destructor
CVE-2017-6345 kernel: llc: skb->sk set without skb->destructor
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20170213,repor...
: Security
Depends On:
Blocks: 1428493
  Show dependency tree / graph
 
Reported: 2017-03-02 11:43 EST by Andrej Nemec
Modified: 2017-03-14 13:48 EDT (History)
35 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The LLC subsystem in the Linux kernel does not ensure that a certain destructor exists in required circumstances, which allows local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls.
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Clone Of:
Environment:
Last Closed: 2017-03-14 10:20:30 EDT
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Regression: ---
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Documentation: ---
CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Andrej Nemec 2017-03-02 11:43:32 EST 
The LLC subsystem in the Linux kernel does not ensure that a certain destructor exists in required circumstances, which allows local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b74d439e1697110c5e5c600643e823eb1dd0762

References:

http://seclists.org/oss-sec/2017/q1/527
Comment 1 Vasily Averin 2017-03-03 03:42:49 EST 
wrong reference to oss-sec.
correct one is
http://seclists.org/oss-sec/2017/q1/527
Comment 2 Andrej Nemec 2017-03-03 03:52:27 EST 
(In reply to Vasily Averin from comment #1)
> wrong reference to oss-sec.
> correct one is
> http://seclists.org/oss-sec/2017/q1/527

Thanks, you are obviously right. Updated.
Comment 3 Justin M. Forbes 2017-03-06 10:31:46 EST 
This was fixed for Fedora in the 4.9.13 kernels.
Comment 6 Vladis Dronov 2017-03-14 10:20:30 EDT 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2, as the kernel module 'llc2.ko' with this security flaw is not shipped with the products listed.
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