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Accepting request 309675 from network:vpn

Browse Source 
- Applied upstream fix for a DoS and potential remote code execution
  vulnerability through payload type (bsc#931272,CVE-2015-3991)
  [+ strongswan-5.2.2-5.3.0_unknown_payload.patch]

OBS-URL: https://build.opensuse.org/request/show/309675
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/strongswan?expand=0&rev=60
This commit is contained in:
Dominique Leuenberger 2015-06-02 08:12:05 +00:00 committed by Git OBS Bridge
commit a596ccdfc9
3 changed files with 176 additions and 1 deletions
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166
strongswan-5.2.2-5.3.0_unknown_payload.patch Normal file
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@ -0,0 +1,166 @@
From 7733b99198111ef1f30a964e15e93cb1e6d27a85 Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Fri, 15 May 2015 11:15:57 +0200
References: bsc#931272,CVE-2015-3991
Subject: [PATCH] unknown-payload: Use a new private payload type and make
original type available
This fixes a DoS and potential remote code execution vulnerability that was
caused because the original payload type that was returned previously was
used to cast such payload objects to payloads of the indicated type (e.g.
when logging notify payloads with a payload type for the wrong IKE version).
Fixes CVE-2015-3991.
---
src/libcharon/encoding/message.c | 2 +-
src/libcharon/encoding/payloads/payload.c | 2 ++
src/libcharon/encoding/payloads/payload.h | 7 ++++++-
src/libcharon/encoding/payloads/unknown_payload.c | 8 ++++++++
src/libcharon/encoding/payloads/unknown_payload.h | 8 ++++++++
src/libcharon/sa/ikev2/task_manager_v2.c | 18 ++++++++++--------
6 files changed, 35 insertions(+), 10 deletions(-)
diff --git a/src/libcharon/encoding/message.c b/src/libcharon/encoding/message.c
index 1ee2cf81b035..478f531eae28 100644
--- a/src/libcharon/encoding/message.c
+++ b/src/libcharon/encoding/message.c
@@ -2513,7 +2513,7 @@ static status_t decrypt_payloads(private_message_t *this, keymat_t *keymat)
was_encrypted = "encrypted fragment payload";
}
- if (payload_is_known(type, this->major_version) && !was_encrypted &&
+ if (type != PL_UNKNOWN && !was_encrypted &&
!is_connectivity_check(this, payload) &&
this->exchange_type != AGGRESSIVE)
{
diff --git a/src/libcharon/encoding/payloads/payload.c b/src/libcharon/encoding/payloads/payload.c
index a1cd2f945588..f7c2754e05c3 100644
--- a/src/libcharon/encoding/payloads/payload.c
+++ b/src/libcharon/encoding/payloads/payload.c
@@ -97,6 +97,7 @@ ENUM_NEXT(payload_type_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_FRAGME
#endif /* ME */
ENUM_NEXT(payload_type_names, PL_HEADER, PLV1_ENCRYPTED, PLV1_FRAGMENT,
"HEADER",
+ "UNKNOWN",
"PROPOSAL_SUBSTRUCTURE",
"PROPOSAL_SUBSTRUCTURE_V1",
"TRANSFORM_SUBSTRUCTURE",
@@ -167,6 +168,7 @@ ENUM_NEXT(payload_type_short_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_
#endif /* ME */
ENUM_NEXT(payload_type_short_names, PL_HEADER, PLV1_ENCRYPTED, PLV1_FRAGMENT,
"HDR",
+ "UNKN",
"PROP",
"PROP",
"TRANS",
diff --git a/src/libcharon/encoding/payloads/payload.h b/src/libcharon/encoding/payloads/payload.h
index 920779bd1032..72003894f307 100644
--- a/src/libcharon/encoding/payloads/payload.h
+++ b/src/libcharon/encoding/payloads/payload.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2007 Tobias Brunner
+ * Copyright (C) 2007-2015 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
@@ -264,6 +264,11 @@ enum payload_type_t {
PL_HEADER = 256,
/**
+ * Used to handle unknown or invalid payload types.
+ */
+ PL_UNKNOWN,
+
+ /**
* PLV2_PROPOSAL_SUBSTRUCTURE, IKEv2 proposals in a SA payload.
*/
PLV2_PROPOSAL_SUBSTRUCTURE,
diff --git a/src/libcharon/encoding/payloads/unknown_payload.c b/src/libcharon/encoding/payloads/unknown_payload.c
index 45b91fd0b32f..c69254fc008c 100644
--- a/src/libcharon/encoding/payloads/unknown_payload.c
+++ b/src/libcharon/encoding/payloads/unknown_payload.c
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
@@ -121,6 +122,12 @@ METHOD(payload_t, get_header_length, int,
METHOD(payload_t, get_payload_type, payload_type_t,
private_unknown_payload_t *this)
{
+ return PL_UNKNOWN;
+}
+
+METHOD(unknown_payload_t, get_type, payload_type_t,
+ private_unknown_payload_t *this)
+{
return this->type;
}
@@ -181,6 +188,7 @@ unknown_payload_t *unknown_payload_create(payload_type_t type)
.destroy = _destroy,
},
.is_critical = _is_critical,
+ .get_type = _get_type,
.get_data = _get_data,
.destroy = _destroy,
},
diff --git a/src/libcharon/encoding/payloads/unknown_payload.h b/src/libcharon/encoding/payloads/unknown_payload.h
index 326b550cd872..09341bcc79b5 100644
--- a/src/libcharon/encoding/payloads/unknown_payload.h
+++ b/src/libcharon/encoding/payloads/unknown_payload.h
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
@@ -42,6 +43,13 @@ struct unknown_payload_t {
payload_t payload_interface;
/**
+ * Get the original payload type as sent by the peer.
+ *
+ * @return type of the original payload
+ */
+ payload_type_t (*get_type) (unknown_payload_t *this);
+
+ /**
* Get the raw data of this payload, without
* the generic payload header.
*
diff --git a/src/libcharon/sa/ikev2/task_manager_v2.c b/src/libcharon/sa/ikev2/task_manager_v2.c
index 298167703cbf..4676867dfec2 100644
--- a/src/libcharon/sa/ikev2/task_manager_v2.c
+++ b/src/libcharon/sa/ikev2/task_manager_v2.c
@@ -1184,15 +1184,17 @@ static status_t parse_message(private_task_manager_t *this, message_t *msg)
enumerator = msg->create_payload_enumerator(msg);
while (enumerator->enumerate(enumerator, &payload))
{
- unknown = (unknown_payload_t*)payload;
- type = payload->get_type(payload);
- if (!payload_is_known(type, msg->get_major_version(msg)) &&
- unknown->is_critical(unknown))
+ if (payload->get_type(payload) == PL_UNKNOWN)
{
- DBG1(DBG_ENC, "payload type %N is not supported, "
- "but its critical!", payload_type_names, type);
- status = NOT_SUPPORTED;
- break;
+ unknown = (unknown_payload_t*)payload;
+ if (unknown->is_critical(unknown))
+ {
+ type = unknown->get_type(unknown);
+ DBG1(DBG_ENC, "payload type %N is not supported, "
+ "but its critical!", payload_type_names, type);
+ status = NOT_SUPPORTED;
+ break;
+ }
}
}
enumerator->destroy(enumerator);
--
1.9.1

7
strongswan.changes
View File

@ -1,3 +1,10 @@
-------------------------------------------------------------------
Mon Jun 1 16:18:35 UTC 2015 - mt@suse.de
- Applied upstream fix for a DoS and potential remote code execution
vulnerability through payload type (bsc#931272,CVE-2015-3991)
[+ strongswan-5.2.2-5.3.0_unknown_payload.patch]
-------------------------------------------------------------------
Mon Jan 5 14:38:46 UTC 2015 - mt@suse.de

4
strongswan.spec
View File

@ -1,7 +1,7 @@
#
# spec file for package strongswan
#
# Copyright (c) 2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
@ -82,6 +82,7 @@ Patch2: %{name}_ipsec_service.patch
Patch3: %{name}_fipscheck.patch
Patch4: %{name}_fipsfilter.patch
%endif
Patch5: %{name}-5.2.2-5.3.0_unknown_payload.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-build
BuildRequires: bison
BuildRequires: curl-devel
@ -291,6 +292,7 @@ and the load testing plugin for IKEv2 daemon.
%if %{with fipscheck}
%patch3 -p0
%patch4 -p1
%patch5 -p1
%endif
sed -e 's|@libexecdir@|%_libexecdir|g' \
< $RPM_SOURCE_DIR/strongswan.init.in \