Bug 961794 - Kernel: TunTap: refuse to re-attach to different tun_struct
Summary: Kernel: TunTap: refuse to re-attach to different tun_struct
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 904467
TreeView+ depends on / blocked
 
Reported: 2013-05-10 12:13 UTC by Prasad Pandit
Modified: 2021-03-26 15:08 UTC (History)
26 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-05-10 14:28:22 UTC
Embargoed:

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Description Prasad Pandit 2013-05-10 12:13:19 UTC 
Linux kernels built with Universal TUN/TAP device driver(CONFIG_TUN) that
includes multiqueue - ioctl(TUNSETQUEUE) - support, is vulnerable to a kernel
crash while attaching a device to a new queue.

A user/program could use this flaw to crash the system resulting in DoS.

Upstream fix:
-------------
 -> https://git.kernel.org/linus/6e331f4c83021e4de2a2fc4981574b5d5b16c425
 -> https://git.kernel.org/linus/7c0c3b1a8a175437991ccc898ed66ec5e4a96208
Comment 1 Prasad Pandit 2013-05-10 12:53:24 UTC 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
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