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f8687afefc
This patch makes two changes to protect applications from either removing or tampering with the CIPSOv4 IP option on a socket. The first is the requirement that applications have the CAP_NET_RAW capability to set an IPOPT_CIPSO option on a socket; this prevents untrusted applications from setting their own CIPSOv4 security attributes on the packets they send. The second change is to SELinux and it prevents applications from setting any IPv4 options when there is an IPOPT_CIPSO option already present on the socket; this prevents applications from removing CIPSOv4 security attributes from the packets they send. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/*
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* SELinux interface to the NetLabel subsystem
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*
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* Author : Paul Moore <paul.moore@hp.com>
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*
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*/
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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _SELINUX_NETLABEL_H_
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#define _SELINUX_NETLABEL_H_
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#include <linux/types.h>
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#include <linux/fs.h>
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#include <linux/net.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include "avc.h"
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#include "objsec.h"
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#ifdef CONFIG_NETLABEL
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void selinux_netlbl_cache_invalidate(void);
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int selinux_netlbl_socket_post_create(struct socket *sock,
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int sock_family,
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u32 sid);
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void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock);
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u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid);
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int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
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struct sk_buff *skb,
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struct avc_audit_data *ad);
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u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock);
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u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb);
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void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
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int family);
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void selinux_netlbl_sk_clone_security(struct sk_security_struct *ssec,
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struct sk_security_struct *newssec);
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int selinux_netlbl_inode_permission(struct inode *inode, int mask);
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int selinux_netlbl_socket_setsockopt(struct socket *sock,
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int level,
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int optname);
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#else
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static inline void selinux_netlbl_cache_invalidate(void)
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{
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return;
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}
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static inline int selinux_netlbl_socket_post_create(struct socket *sock,
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int sock_family,
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u32 sid)
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{
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return 0;
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}
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static inline void selinux_netlbl_sock_graft(struct sock *sk,
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struct socket *sock)
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{
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return;
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}
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static inline u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb,
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u32 sock_sid)
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{
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return SECSID_NULL;
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}
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static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
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struct sk_buff *skb,
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struct avc_audit_data *ad)
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{
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return 0;
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}
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static inline u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
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{
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return SECSID_NULL;
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}
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static inline u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
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{
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return SECSID_NULL;
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}
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static inline void selinux_netlbl_sk_security_init(
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struct sk_security_struct *ssec,
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int family)
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{
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return;
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}
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static inline void selinux_netlbl_sk_clone_security(
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struct sk_security_struct *ssec,
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struct sk_security_struct *newssec)
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{
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return;
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}
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static inline int selinux_netlbl_inode_permission(struct inode *inode,
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int mask)
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{
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return 0;
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}
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static inline int selinux_netlbl_socket_setsockopt(struct socket *sock,
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int level,
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int optname)
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{
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return 0;
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}
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#endif /* CONFIG_NETLABEL */
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#endif
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