Message ID | 1369051588-12622-1-git-send-email-luis.henriques@canonical.com |
---|---|
State | New |
Headers | show |
On Mon, May 20, 2013 at 01:06:28PM +0100, Luis Henriques wrote: > From: Mathias Krause <minipli@googlemail.com> > > CVE-2013-3229 > > BugLink: https://bugs.launchpad.net/bugs/1172381 > > The current code does not fill the msg_name member in case it is set. > It also does not set the msg_namelen member to 0 and therefore makes > net/socket.c leak the local, uninitialized sockaddr_storage variable > to userland -- 128 bytes of kernel stack memory. > > Fix that by simply setting msg_namelen to 0 as obviously nobody cared > about iucv_sock_recvmsg() not filling the msg_name in case it was set. > > Cc: Ursula Braun <ursula.braun@de.ibm.com> > Signed-off-by: Mathias Krause <minipli@googlemail.com> > Signed-off-by: David S. Miller <davem@davemloft.net> > (back ported from commit a5598bd9c087dc0efc250a5221e5d0e6f584ee88) > > Signed-off-by: Luis Henriques <luis.henriques@canonical.com> > --- > net/iucv/af_iucv.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c > index bada1b9..f605b23 100644 > --- a/net/iucv/af_iucv.c > +++ b/net/iucv/af_iucv.c > @@ -1160,6 +1160,8 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, > struct sk_buff *skb, *rskb, *cskb; > int err = 0; > > + msg->msg_namelen = 0; > + > if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && > skb_queue_empty(&iucv->backlog_skb_q) && > skb_queue_empty(&sk->sk_receive_queue) && > -- > 1.8.1.2 > > > -- > kernel-team mailing list > kernel-team@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/kernel-team Cheers, -- Luis
On Mon, May 20, 2013 at 01:06:28PM +0100, Luis Henriques wrote: > From: Mathias Krause <minipli@googlemail.com> > > CVE-2013-3229 > > BugLink: https://bugs.launchpad.net/bugs/1172381 > > The current code does not fill the msg_name member in case it is set. > It also does not set the msg_namelen member to 0 and therefore makes > net/socket.c leak the local, uninitialized sockaddr_storage variable > to userland -- 128 bytes of kernel stack memory. > > Fix that by simply setting msg_namelen to 0 as obviously nobody cared > about iucv_sock_recvmsg() not filling the msg_name in case it was set. > > Cc: Ursula Braun <ursula.braun@de.ibm.com> > Signed-off-by: Mathias Krause <minipli@googlemail.com> > Signed-off-by: David S. Miller <davem@davemloft.net> > (back ported from commit a5598bd9c087dc0efc250a5221e5d0e6f584ee88) > > Signed-off-by: Luis Henriques <luis.henriques@canonical.com> > --- > net/iucv/af_iucv.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c > index bada1b9..f605b23 100644 > --- a/net/iucv/af_iucv.c > +++ b/net/iucv/af_iucv.c > @@ -1160,6 +1160,8 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, > struct sk_buff *skb, *rskb, *cskb; > int err = 0; > > + msg->msg_namelen = 0; > + > if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && > skb_queue_empty(&iucv->backlog_skb_q) && > skb_queue_empty(&sk->sk_receive_queue) && > -- Valid looking backport of the above sha1. Looks to do what is claimed. Acked-by: Andy Whitcroft <apw@canonical.com> -apw
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index bada1b9..f605b23 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -1160,6 +1160,8 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct sk_buff *skb, *rskb, *cskb; int err = 0; + msg->msg_namelen = 0; + if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && skb_queue_empty(&iucv->backlog_skb_q) && skb_queue_empty(&sk->sk_receive_queue) &&