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 269ee89d2c2bed67fe1c7f7de7c1265b931daa92..b23b9f3f6d0a37a5395c90913b523c403f7b1dfe 100644 (file)
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1996,7 +1996,7 @@ 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 6d16e1ab1a8aba336f375ea0512e0ba86eff2876..189d8c77b0707d54e8f4ddb6a16dbe70e7c8164b 100644 (file)
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1488,7 +1488,7 @@ 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 cf7d974e0f619a60ef5c6a037705974c622810f2..35b37052252437b8b75e642b9d2ac459648557d0 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)
 {