gnu: wpa-supplicant: Fix "KRACK" key reinstallation attacks [security fixes].

Fixes CVE-2017-{13078,13079,13080,13081,13082,13087,13088}.

See these announcements for more information:
https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
https://www.krackattacks.com/

* gnu/packages/patches/wpa-supplicant-CVE-2017-13082.patch,
gnu/packages/patches/wpa-supplicant-fix-key-reuse.patch,
gnu/packages/patches/wpa-supplicant-fix-nonce-reuse.patch
gnu/packages/patches/wpa-supplicant-fix-zeroed-keys.patch,
gnu/packages/patches/wpa-supplicant-krack-followups.patch: New files.
* gnu/packages/admin.scm (wpa-supplicant-minimal)[source]: Use them.
* gnu/local.mk (dist_patch_DATA): Add them.

1 files changed, 72 insertions, 0 deletions

diff --git a/gnu/packages/patches/wpa-supplicant-fix-nonce-reuse.patch b/gnu/packages/patches/wpa-supplicant-fix-nonce-reuse.patch
new file mode 100644
index 0000000000..d8dd9cd204
--- /dev/null
+++ b/gnu/packages/patches/wpa-supplicant-fix-nonce-reuse.patch
@@ -0,0 +1,72 @@
+Fix a nonce re-use bug:
+
+https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
+
+Patch copied from upstream:
+
+https://w1.fi/security/2017-1/rebased-v2.6-0005-Fix-PTK-rekeying-to-generate-a-new-ANonce.patch
+
+From 12fac09b437a1dc8a0f253e265934a8aaf4d2f8b Mon Sep 17 00:00:00 2001
+From: Jouni Malinen <j@w1.fi>
+Date: Sun, 1 Oct 2017 12:32:57 +0300
+Subject: [PATCH 5/8] Fix PTK rekeying to generate a new ANonce
+
+The Authenticator state machine path for PTK rekeying ended up bypassing
+the AUTHENTICATION2 state where a new ANonce is generated when going
+directly to the PTKSTART state since there is no need to try to
+determine the PMK again in such a case. This is far from ideal since the
+new PTK would depend on a new nonce only from the supplicant.
+
+Fix this by generating a new ANonce when moving to the PTKSTART state
+for the purpose of starting new 4-way handshake to rekey PTK.
+
+Signed-off-by: Jouni Malinen <j@w1.fi>
+---
+ src/ap/wpa_auth.c | 24 +++++++++++++++++++++---
+ 1 file changed, 21 insertions(+), 3 deletions(-)
+
+diff --git a/src/ap/wpa_auth.c b/src/ap/wpa_auth.c
+index 707971d..bf10cc1 100644
+--- a/src/ap/wpa_auth.c
++++ b/src/ap/wpa_auth.c
+@@ -1901,6 +1901,21 @@ SM_STATE(WPA_PTK, AUTHENTICATION2)
+ }
+ 
+ 
++static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
++{
++	if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
++		wpa_printf(MSG_ERROR,
++			   "WPA: Failed to get random data for ANonce");
++		sm->Disconnect = TRUE;
++		return -1;
++	}
++	wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
++		    WPA_NONCE_LEN);
++	sm->TimeoutCtr = 0;
++	return 0;
++}
++
++
+ SM_STATE(WPA_PTK, INITPMK)
+ {
+ 	u8 msk[2 * PMK_LEN];
+@@ -2458,9 +2473,12 @@ SM_STEP(WPA_PTK)
+ 		SM_ENTER(WPA_PTK, AUTHENTICATION);
+ 	else if (sm->ReAuthenticationRequest)
+ 		SM_ENTER(WPA_PTK, AUTHENTICATION2);
+-	else if (sm->PTKRequest)
+-		SM_ENTER(WPA_PTK, PTKSTART);
+-	else switch (sm->wpa_ptk_state) {
++	else if (sm->PTKRequest) {
++		if (wpa_auth_sm_ptk_update(sm) < 0)
++			SM_ENTER(WPA_PTK, DISCONNECTED);
++		else
++			SM_ENTER(WPA_PTK, PTKSTART);
++	} else switch (sm->wpa_ptk_state) {
+ 	case WPA_PTK_INITIALIZE:
+ 		break;
+ 	case WPA_PTK_DISCONNECT:
+-- 
+2.7.4
+