Bug 1428485 (CVE-2017-6345) - CVE-2017-6345 kernel: llc: skb->sk set without skb->destructor
Summary: CVE-2017-6345 kernel: llc: skb->sk set without skb->destructor
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-6345
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1428493
TreeView+ depends on / blocked
 
Reported: 2017-03-02 16:43 UTC by Andrej Nemec
Modified: 2021-02-17 02:31 UTC (History)
35 users (show)

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.
Clone Of:
Environment:
Last Closed: 2017-03-14 14:20:30 UTC


Attachments (Terms of Use)

Description Andrej Nemec 2017-03-02 16:43:32 UTC
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 08:42:49 UTC
wrong reference to oss-sec.
correct one is
http://seclists.org/oss-sec/2017/q1/527

Comment 2 Andrej Nemec 2017-03-03 08:52:27 UTC
(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 15:31:46 UTC
This was fixed for Fedora in the 4.9.13 kernels.

Comment 6 Vladis Dronov 2017-03-14 14:20:30 UTC
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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