* [PATCH] bluethooth: sco: fix information leak to userspace
@ 2011-02-14 10:54 Vasiliy Kulikov
2011-02-14 14:36 ` Gustavo F. Padovan
0 siblings, 1 reply; 2+ messages in thread
From: Vasiliy Kulikov @ 2011-02-14 10:54 UTC (permalink / raw)
To: linux-kernel
Cc: security, Marcel Holtmann, Gustavo F. Padovan, David S. Miller,
linux-bluetooth, netdev
struct sco_conninfo has one padding byte in the end. Local variable
cinfo of type sco_conninfo is copied to userspace with this uninizialized
one byte, leading to old stack contents leak.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
---
Compile tested.
net/bluetooth/sco.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 960c6d1..926ed39 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -703,6 +703,7 @@ static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user
break;
}
+ memset(&cinfo, 0, sizeof(cinfo));
cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
--
1.7.0.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] bluethooth: sco: fix information leak to userspace
2011-02-14 10:54 [PATCH] bluethooth: sco: fix information leak to userspace Vasiliy Kulikov
@ 2011-02-14 14:36 ` Gustavo F. Padovan
0 siblings, 0 replies; 2+ messages in thread
From: Gustavo F. Padovan @ 2011-02-14 14:36 UTC (permalink / raw)
To: Vasiliy Kulikov
Cc: linux-kernel, security, Marcel Holtmann, David S. Miller,
linux-bluetooth, netdev
Hi Vasiliy,
* Vasiliy Kulikov <segoon@openwall.com> [2011-02-14 13:54:26 +0300]:
> struct sco_conninfo has one padding byte in the end. Local variable
> cinfo of type sco_conninfo is copied to userspace with this uninizialized
> one byte, leading to old stack contents leak.
>
> Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
> ---
> Compile tested.
>
> net/bluetooth/sco.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
Applied as well, thanks.
--
Gustavo F. Padovan
http://profusion.mobi
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