diff mbox

[4/6] econet: 4 byte infoleak to the network CVE-2011-1173

Message ID 1309796566-2645-5-git-send-email-paolo.pisati@canonical.com
State New
Headers show

Commit Message

Paolo Pisati July 4, 2011, 4:22 p.m. UTC
From: Vasiliy Kulikov <segoon@openwall.com>

BugLink: http://bugs.launchpad.net/bugs/801484

commit upstream 67c5c6cb8129c595f21e88254a3fc6b3b841ae8e

struct aunhdr has 4 padding bytes between 'pad' and 'handle' fields on
x86_64.  These bytes are not initialized in the variable 'ah' before
sending 'ah' to the network.  This leads to 4 bytes kernel stack
infoleak.

This bug was introduced before the git epoch.

CVE-2011-1173

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Phil Blundell <philb@gnu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
---
 net/econet/af_econet.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

Comments

Andy Whitcroft July 4, 2011, 5:02 p.m. UTC | #1
On Mon, Jul 04, 2011 at 05:22:44PM +0100, paolo.pisati@canonical.com wrote:
> From: Vasiliy Kulikov <segoon@openwall.com>
> 
> BugLink: http://bugs.launchpad.net/bugs/801484
> 
> commit upstream 67c5c6cb8129c595f21e88254a3fc6b3b841ae8e
> 
> struct aunhdr has 4 padding bytes between 'pad' and 'handle' fields on
> x86_64.  These bytes are not initialized in the variable 'ah' before
> sending 'ah' to the network.  This leads to 4 bytes kernel stack
> infoleak.
> 
> This bug was introduced before the git epoch.
> 
> CVE-2011-1173
> 
> Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
> Acked-by: Phil Blundell <philb@gnu.org>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
> ---
>  net/econet/af_econet.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
> index 59092f4..bda42d3 100644
> --- a/net/econet/af_econet.c
> +++ b/net/econet/af_econet.c
> @@ -434,10 +434,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
>  		udpdest.sin_addr.s_addr = htonl(network | addr.station);
>  	}
>  
> +	memset(&ah, 0, sizeof(ah));
>  	ah.port = port;
>  	ah.cb = cb & 0x7f;
>  	ah.code = 2;		/* magic */
> -	ah.pad = 0;
>  
>  	/* tack our header on the front of the iovec */
>  	size = sizeof(struct aunhdr);

Looks identicle to the upstream commit, appears sane.

Acked-by: Andy Whitcroft <apw@canonical.com>

-apw
diff mbox

Patch

diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 59092f4..bda42d3 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -434,10 +434,10 @@  static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
 		udpdest.sin_addr.s_addr = htonl(network | addr.station);
 	}
 
+	memset(&ah, 0, sizeof(ah));
 	ah.port = port;
 	ah.cb = cb & 0x7f;
 	ah.code = 2;		/* magic */
-	ah.pad = 0;
 
 	/* tack our header on the front of the iovec */
 	size = sizeof(struct aunhdr);