dccp: 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 'dccp' protocol is 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 dccp-disable-auto-loading-as-mitigation-against-local-exploits.patch

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 8fc160098e112b73a8191fb861f1dcad92f4b920..65aa68538f0567d3cecffb1249c2e708a8ba0d66 100644 (file)
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -1073,8 +1073,8 @@ module_exit(dccp_v4_exit);
  * values directly, Also cover the case where the protocol is not specified,
  * i.e. net-pf-PF_INET-proto-0-type-SOCK_DCCP
  */
-MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 33, 6);
-MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 0, 6);
+/* MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 33, 6); */
+/* MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET, 0, 6); */
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
 MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol");

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 28e8252cc5ea58d260dced35c556394eef745b4f..ea83a1e3b880bf596e58b73a8bca34d4981b0442 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1134,8 +1134,8 @@ module_exit(dccp_v6_exit);
  * values directly, Also cover the case where the protocol is not specified,
  * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP
  */
-MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 33, 6);
-MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 0, 6);
+/* MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 33, 6); */
+/* MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 0, 6); */
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
 MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol");