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authorNiels de Vos <ndevos@redhat.com>2014-10-27 13:57:44 +0100
committerNiels de Vos <ndevos@redhat.com>2014-10-28 08:49:41 -0700
commit027d38cf6ba838cd015886207d3c265ef6446757 (patch)
treef4957a0934af85114d970161e2ba16da4f82a4d0 /rpc
parenta539b29c1c28dff78fa2314deafd2948f5f8ae1a (diff)
socket: disallow CBC cipher modes
This is related to CVE-2014-3566 a.k.a. POODLE. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3566 POODLE is specific to CBC cipher modes in SSLv3. Because there is no way to prevent SSLv3 fallback on a system with an unpatched version of OpenSSL, users of such systems can only be protected by disallowing CBC modes. The default cipher-mode specification in our code has been changed accordingly. Users can still set their own cipher modes if they wish. To support them, the ssl-authz.t test script provides an example of how to combine the CBC exclusion with other criteria in a script. Cherry picked from commit 378a0a19d95e552220d71b13be685f4772c576cd: > Change-Id: Ib1fa547082fbb7de9df94ffd182b1800d6e354e5 > BUG: 1155328 > Signed-off-by: Jeff Darcy <jdarcy@redhat.com> > Reviewed-on: http://review.gluster.org/8962 > Tested-by: Gluster Build System <jenkins@build.gluster.com> > Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> > Reviewed-by: Vijay Bellur <vbellur@redhat.com> ssl-auth.t has been modified to not set the auth.ssl-allow option. This option is not available in the 3.5 branch. Change-Id: Ib1fa547082fbb7de9df94ffd182b1800d6e354e5 BUG: 1157661 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/8979 Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'rpc')
-rw-r--r--rpc/rpc-transport/socket/src/socket.c69
1 files changed, 68 insertions, 1 deletions
diff --git a/rpc/rpc-transport/socket/src/socket.c b/rpc/rpc-transport/socket/src/socket.c
index 7b1beac0914..a00202e4732 100644
--- a/rpc/rpc-transport/socket/src/socket.c
+++ b/rpc/rpc-transport/socket/src/socket.c
@@ -45,6 +45,72 @@
#define SSL_CA_LIST_OPT "transport.socket.ssl-ca-list"
#define OWN_THREAD_OPT "transport.socket.own-thread"
+/*
+ * This list was derived by taking the cipher list "HIGH:!SSLv2" (the previous
+ * default) and excluding CBC entries to mitigate the "POODLE" attack. It
+ * should be re-evaluated in light of each future vulnerability, as those are
+ * discovered.
+ */
+static char *default_cipher_list =
+ "ECDHE-RSA-AES256-GCM-SHA384:"
+ "ECDHE-ECDSA-AES256-GCM-SHA384:"
+ "ECDHE-RSA-AES256-SHA384:"
+ "ECDHE-ECDSA-AES256-SHA384:"
+ "ECDHE-RSA-AES256-SHA:"
+ "ECDHE-ECDSA-AES256-SHA:"
+ "DHE-DSS-AES256-GCM-SHA384:"
+ "DHE-RSA-AES256-GCM-SHA384:"
+ "DHE-RSA-AES256-SHA256:"
+ "DHE-DSS-AES256-SHA256:"
+ "DHE-RSA-AES256-SHA:"
+ "DHE-DSS-AES256-SHA:"
+ "DHE-RSA-CAMELLIA256-SHA:"
+ "DHE-DSS-CAMELLIA256-SHA:"
+ "AECDH-AES256-SHA:"
+ "ADH-AES256-GCM-SHA384:"
+ "ADH-AES256-SHA256:"
+ "ADH-AES256-SHA:"
+ "ADH-CAMELLIA256-SHA:"
+ "ECDH-RSA-AES256-GCM-SHA384:"
+ "ECDH-ECDSA-AES256-GCM-SHA384:"
+ "ECDH-RSA-AES256-SHA384:"
+ "ECDH-ECDSA-AES256-SHA384:"
+ "ECDH-RSA-AES256-SHA:"
+ "ECDH-ECDSA-AES256-SHA:"
+ "AES256-GCM-SHA384:"
+ "AES256-SHA256:"
+ "AES256-SHA:"
+ "CAMELLIA256-SHA:"
+ "ECDHE-RSA-AES128-GCM-SHA256:"
+ "ECDHE-ECDSA-AES128-GCM-SHA256:"
+ "ECDHE-RSA-AES128-SHA256:"
+ "ECDHE-ECDSA-AES128-SHA256:"
+ "ECDHE-RSA-AES128-SHA:"
+ "ECDHE-ECDSA-AES128-SHA:"
+ "DHE-DSS-AES128-GCM-SHA256:"
+ "DHE-RSA-AES128-GCM-SHA256:"
+ "DHE-RSA-AES128-SHA256:"
+ "DHE-DSS-AES128-SHA256:"
+ "DHE-RSA-AES128-SHA:"
+ "DHE-DSS-AES128-SHA:"
+ "DHE-RSA-CAMELLIA128-SHA:"
+ "DHE-DSS-CAMELLIA128-SHA:"
+ "AECDH-AES128-SHA:"
+ "ADH-AES128-GCM-SHA256:"
+ "ADH-AES128-SHA256:"
+ "ADH-AES128-SHA:"
+ "ADH-CAMELLIA128-SHA:"
+ "ECDH-RSA-AES128-GCM-SHA256:"
+ "ECDH-ECDSA-AES128-GCM-SHA256:"
+ "ECDH-RSA-AES128-SHA256:"
+ "ECDH-ECDSA-AES128-SHA256:"
+ "ECDH-RSA-AES128-SHA:"
+ "ECDH-ECDSA-AES128-SHA:"
+ "AES128-GCM-SHA256:"
+ "AES128-SHA256:"
+ "AES128-SHA:"
+ "CAMELLIA128-SHA"; /* no colon for last entry */
+
/* TBD: do automake substitutions etc. (ick) to set these. */
#if !defined(DEFAULT_CERT_PATH)
#define DEFAULT_CERT_PATH "/etc/ssl/glusterfs.pem"
@@ -3402,6 +3468,7 @@ socket_init (rpc_transport_t *this)
uint32_t keepalive = 0;
uint32_t backlog = 0;
int session_id = 0;
+ char *cipher_list = default_cipher_list;
if (this->private) {
gf_log_callingfn (this->name, GF_LOG_ERROR,
@@ -3599,7 +3666,7 @@ socket_init (rpc_transport_t *this)
priv->ssl_ctx = SSL_CTX_new(priv->ssl_meth);
if (SSL_CTX_set_cipher_list(priv->ssl_ctx,
- "HIGH:-SSLv2") == 0) {
+ cipher_list) == 0) {
gf_log(this->name,GF_LOG_ERROR,
"failed to find any valid ciphers");
goto err;