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Date: Thu, 4 Nov 2010 07:16:11 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: coley <coley@...re.org>
Subject: Re: CVE request: kernel stack infoleaks
----- "Jon Oberheide" <jon@...rheide.org> wrote:
> Vasiliy Kulikov discovered three kernel stack infoleaks in various
> packet families of the net subsystem:
>
> ===========================================================
>
> net/ax25
>
> Sometimes ax25_getname() doesn't initialize all members of fsa_digipeater
> field of fsa struct. This structure is then copied to userland. It
> leads to leaking of contents of kernel stack memory. We have to
> initialize them to zero.
>
> http://marc.info/?l=linux-netdev&m=128854507120898&w=2
>
Use CVE-2010-3875 for this one.
> ===========================================================
>
> net/packet
>
> packet_getname_spkt() doesn't initialize all members of sa_data field of
> sockaddr struct if strlen(dev->name) < 13. This structure is then copied
> to userland. It leads to leaking of contents of kernel stack memory. We
> have to fully fill sa_data with strncpy() instead of strlcpy().
>
> http://marc.info/?l=linux-netdev&m=128854507220908&w=2
>
CVE-2010-3876
> ===========================================================
>
> net/tipc
>
> Structure sockaddr_tipc is copied to userland with padding bytes after
> "id" field in union field "name" unitialized. It leads to leaking of
> contents of kernel stack memory. We have to initialize them to zero.
>
> http://marc.info/?l=linux-netdev&m=128854507420917&w=2
>
CVE-2010-3877
Thanks.
--
JB
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