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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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
CVE-2019-11884
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
Change-Id: If26bd0108596f42bb48349146f0c84eb0a675276
This commit is contained in:
Young Xiao
2019-08-09 12:05:04 +02:00
committed by Francescodario Cuzzocrea
parent 06215f21e6
commit 6e214c858f
1 changed files with 1 additions and 0 deletions
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net/bluetooth/hidp/sock.c
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@@ -84,6 +84,7 @@ 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;
if (csock->sk->sk_state != BT_CONNECTED ||
isock->sk->sk_state != BT_CONNECTED) {