Re: CVE Request: Linux kernel: net: uninitialised memory leakage

[P J P <ppandit () redhat com>]

   Hello Hannes,

+-- On Thu, 28 Nov 2013, Hannes Frederic Sowa wrote --+
| This patch does break stuff, a follow-up is needed which did not get to 
| Linus yet, but is already queued up for stable. Otherwise traceroute is 
| broken:
| 
| https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=85fbaa75037d0b6b786ff18658ddf0b4014ce2a4

  I see. Thanks so much for the heads-up and link to the follow-up patch.

 
| I found other leaks in non-inet protocols:
| 
| https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
| 
| The protocols where I did remove msg_namelen = 0 where actually
| safe. Some of the protocols I did not touch could leak up to 128 bytes
| of uninitialized data from the stack.
| 
| Hardening against out-of-bounds writes:
| https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=68c6beb373955da0886d8f4f5995b3922ceda4be
| 
| Also there is a small 2-bytes memory leak in extended error reporting:
| https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=68c6beb373955da0886d8f4f5995b3922ceda4be

  Thank you for sharing these too!


Thank you! :)
--
Prasad J Pandit / Red Hat Security Response Team