From: Young Xiao YangX92@hotmail.com
commit a1616a5ac99ede5d605047a9012481ce7ff18b16 upstream.
Struct ca is copied from userspace. It is not checked whether the "name" field is NULL terminated, which allows local users to obtain potentially sensitive information from kernel stack memory, via a HIDPCONNADD command.
This vulnerability is similar to CVE-2011-1079.
Signed-off-by: Young Xiao YangX92@hotmail.com Signed-off-by: Marcel Holtmann marcel@holtmann.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/bluetooth/hidp/sock.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/bluetooth/hidp/sock.c +++ b/net/bluetooth/hidp/sock.c @@ -75,6 +75,7 @@ static int do_hidp_sock_ioctl(struct soc sockfd_put(csock); return err; } + ca.name[sizeof(ca.name)-1] = 0;
err = hidp_connection_add(&ca, csock, isock); if (!err && copy_to_user(argp, &ca, sizeof(ca)))