From a75346fa69bb6a70e855517763ac6acef3168426 Mon Sep 17 00:00:00 2001 From: Young Xiao Date: Fri, 12 Apr 2019 15:24:30 +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 --- 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 5b7abfad038b..773d25d2ade1 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)))