From 6c40914c0c637ee27ab513e734ef63e5a532cdb1 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sun, 10 Jan 2016 17:03:37 +0000 Subject: hostapd: fix post v2.4 security issues - WPS: Fix HTTP chunked transfer encoding parser (CVE-2015-4141) - EAP-pwd peer: Fix payload length validation for Commit and Confirm (CVE-2015-4143) - EAP-pwd server: Fix payload length validation for Commit and Confirm (CVE-2015-4143) - EAP-pwd peer: Fix Total-Length parsing for fragment reassembly (CVE-2015-4144, CVE-2015-4145) - EAP-pwd server: Fix Total-Length parsing for fragment reassembly (CVE-2015-4144, CVE-2015-4145) - EAP-pwd peer: Fix asymmetric fragmentation behavior (CVE-2015-4146) - NFC: Fix payload length validation in NDEF record parser (CVE-2015-8041) - WNM: Ignore Key Data in WNM Sleep Mode Response frame if no PMF in use (CVE-2015-5310) - EAP-pwd peer: Fix last fragment length validation (CVE-2015-5315) - EAP-pwd server: Fix last fragment length validation (CVE-2015-5314) - EAP-pwd peer: Fix error path for unexpected Confirm message (CVE-2015-5316) Signed-off-by: Stefan Lippers-Hollmann SVN-Revision: 48185 --- ...ver-Fix-payload-length-validation-for-Com.patch | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 package/network/services/hostapd/patches/005-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch (limited to 'package/network/services/hostapd/patches/005-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch') diff --git a/package/network/services/hostapd/patches/005-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch b/package/network/services/hostapd/patches/005-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch new file mode 100644 index 0000000..5dca20b --- /dev/null +++ b/package/network/services/hostapd/patches/005-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch @@ -0,0 +1,66 @@ +From e28a58be26184c2a23f80b410e0997ef1bd5d578 Mon Sep 17 00:00:00 2001 +From: Jouni Malinen +Date: Fri, 1 May 2015 16:40:44 +0300 +Subject: [PATCH 2/5] EAP-pwd server: Fix payload length validation for Commit + and Confirm + +The length of the received Commit and Confirm message payloads was not +checked before reading them. This could result in a buffer read +overflow when processing an invalid message. + +Fix this by verifying that the payload is of expected length before +processing it. In addition, enforce correct state transition sequence to +make sure there is no unexpected behavior if receiving a Commit/Confirm +message before the previous exchanges have been completed. + +Thanks to Kostya Kortchinsky of Google security team for discovering and +reporting this issue. + +Signed-off-by: Jouni Malinen +--- + src/eap_server/eap_server_pwd.c | 19 +++++++++++++++++++ + 1 file changed, 19 insertions(+) + +diff --git a/src/eap_server/eap_server_pwd.c b/src/eap_server/eap_server_pwd.c +index 66bd5d2..3189105 100644 +--- a/src/eap_server/eap_server_pwd.c ++++ b/src/eap_server/eap_server_pwd.c +@@ -656,9 +656,21 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data, + BIGNUM *x = NULL, *y = NULL, *cofactor = NULL; + EC_POINT *K = NULL, *point = NULL; + int res = 0; ++ size_t prime_len, order_len; + + wpa_printf(MSG_DEBUG, "EAP-pwd: Received commit response"); + ++ prime_len = BN_num_bytes(data->grp->prime); ++ order_len = BN_num_bytes(data->grp->order); ++ ++ if (payload_len != 2 * prime_len + order_len) { ++ wpa_printf(MSG_INFO, ++ "EAP-pwd: Unexpected Commit payload length %u (expected %u)", ++ (unsigned int) payload_len, ++ (unsigned int) (2 * prime_len + order_len)); ++ goto fin; ++ } ++ + if (((data->peer_scalar = BN_new()) == NULL) || + ((data->k = BN_new()) == NULL) || + ((cofactor = BN_new()) == NULL) || +@@ -774,6 +786,13 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data, + u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr; + int offset; + ++ if (payload_len != SHA256_MAC_LEN) { ++ wpa_printf(MSG_INFO, ++ "EAP-pwd: Unexpected Confirm payload length %u (expected %u)", ++ (unsigned int) payload_len, SHA256_MAC_LEN); ++ goto fin; ++ } ++ + /* build up the ciphersuite: group | random_function | prf */ + grp = htons(data->group_num); + ptr = (u8 *) &cs; +-- +1.9.1 + -- cgit v1.1