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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