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
Embargoed:

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.
Note You need to log in before you can comment on or make changes to this bug.