From a6ba226d90c30d10c992a50ad289ab1512e4c063 Mon Sep 17 00:00:00 2001 From: Young Xiao Date: Mon, 13 May 2019 00:18:09 +0800 Subject: [PATCH] Bluetooth: hidp: fix buffer overflow 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 Signed-off-by: Marcel Holtmann Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yang Yingliang --- net/bluetooth/hidp/sock.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c index 1eaac01f85de..7f36fa73ffee 100644 --- a/net/bluetooth/hidp/sock.c +++ b/net/bluetooth/hidp/sock.c @@ -76,6 +76,7 @@ static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long 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))) -- GitLab