hamradio: Disable auto-loading as mitigation against local exploits

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 bb222b882b6776481a17c9a4cc9ed6d97150c986..266a81b45528af18a08c99200a3cce65bb9f847e 100644 (file)
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1988,7 +1988,7 @@ 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 c4f54ad2b98afb44002415ce1daf2afef646d8c0..b63f8b0264aabac8742018d13fd907621973a50b 100644 (file)
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1486,7 +1486,7 @@ 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 f0e9ccf472a970004bd4ea1adb4d758b926b5837..9dff7b0fe2f8d7f38423b4fa9ae332066b005ea6 100644 (file)
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1577,7 +1577,7 @@ 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)
 {