hamradio: Disable auto-loading as mitigation against local exploits

Forwarded: not-needed

We can mitigate the effect of vulnerabilities in obscure protocols by
preventing unprivileged users from loading the modules, so that they
are only exploitable on systems where the administrator has chosen to
load the protocol.

The 'ham' radio protocols (ax25, netrom, rose) are not actively
maintained or widely used.  Therefore disable auto-loading.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Gbp-Pq: Topic debian
Gbp-Pq: Name hamradio-disable-auto-loading-as-mitigation-against-local-exploits.patch

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index d8da400cb4de152db3825074c36ed61c6c101b7a..ad041e8b33788711dbd621843fc188a61c72bb33 100644 (file)
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -2061,7 +2061,7 @@ module_init(ax25_init);
 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_AX25);
+/* MODULE_ALIAS_NETPROTO(PF_AX25); */
 
 static void __exit ax25_exit(void)
 {

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 5a4cb796150f5abfcfd2f500e954d3e197149d6b..bd3483a7e3977e0f73d2560e9d2871277ee51c29 100644 (file)
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1494,7 +1494,7 @@ MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_NETROM);
+/* MODULE_ALIAS_NETPROTO(PF_NETROM); */
 
 static void __exit nr_exit(void)
 {

diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index ca2b17f32670dc232ebaeced139782d0ccb4e899..0f08a031e8c21516e1eeadad02cafd9abcf35286 100644 (file)
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1600,7 +1600,7 @@ MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_ROSE);
+/* MODULE_ALIAS_NETPROTO(PF_ROSE); */
 
 static void __exit rose_exit(void)
 {