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Bluetooth: hidp: fix buffer overflow

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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>
This commit is contained in:
Young Xiao 2019-04-12 15:24:30 +08:00 committed by Greg Kroah-Hartman
parent 07b7b1c823
commit 2c33156b2d
1 changed files with 1 additions and 0 deletions
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net/bluetooth/hidp/sock.c
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@ -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)))