09748a3527
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.
73 lines
2.1 KiB
Diff
73 lines
2.1 KiB
Diff
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
|
|
|