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package/connman: fix CVE-2022-3229{2,3} 

Fix CVE-2022-32292: In ConnMan through 1.41, remote attackers able to
send HTTP requests to the gweb component are able to exploit a
heap-based buffer overflow in received_data to execute code.

Fix CVE-2022-32293: In ConnMan through 1.41, a man-in-the-middle attack
against a WISPR HTTP query could be used to trigger a use-after-free in
WISPR handling, leading to crashes or code execution.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 2f2b4c80f4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2022.11.x
Fabrice Fontaine 2022-12-08 21:43:49 +01:00 committed by Peter Korsgaard
parent 649b455d3d
commit d6943457c4
4 changed files with 360 additions and 0 deletions
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36
package/connman/0001-gweb-Fix-OOB-write-in-received_data.patch 100644
View File

@ -0,0 +1,36 @@
From d1a5ede5d255bde8ef707f8441b997563b9312bd Mon Sep 17 00:00:00 2001
From: Nathan Crandall <ncrandall@tesla.com>
Date: Tue, 12 Jul 2022 08:56:34 +0200
Subject: gweb: Fix OOB write in received_data()
There is a mismatch of handling binary vs. C-string data with memchr
and strlen, resulting in pos, count, and bytes_read to become out of
sync and result in a heap overflow. Instead, do not treat the buffer
as an ASCII C-string. We calculate the count based on the return value
of memchr, instead of strlen.
Fixes: CVE-2022-32292
[Retrieved from:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=d1a5ede5d255bde8ef707f8441b997563b9312bd]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
gweb/gweb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gweb/gweb.c b/gweb/gweb.c
index 12fcb1d8..13c6c5f2 100644
--- a/gweb/gweb.c
+++ b/gweb/gweb.c
@@ -918,7 +918,7 @@ static gboolean received_data(GIOChannel *channel, GIOCondition cond,
}
*pos = '\0';
- count = strlen((char *) ptr);
+ count = pos - ptr;
if (count > 0 && ptr[count - 1] == '\r') {
ptr[--count] = '\0';
bytes_read--;
--
cgit

142
package/connman/0002-wispr-Add-reference-counter-to-portal-context.patch 100644
View File

@ -0,0 +1,142 @@
From 72343929836de80727a27d6744c869dff045757c Mon Sep 17 00:00:00 2001
From: Daniel Wagner <wagi@monom.org>
Date: Tue, 5 Jul 2022 08:32:12 +0200
Subject: wispr: Add reference counter to portal context
Track the connman_wispr_portal_context live time via a
refcounter. This only adds the infrastructure to do proper reference
counting.
Fixes: CVE-2022-32293
[Retrieved from:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=72343929836de80727a27d6744c869dff045757c]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
src/wispr.c | 52 ++++++++++++++++++++++++++++++++++++++++++----------
1 file changed, 42 insertions(+), 10 deletions(-)
diff --git a/src/wispr.c b/src/wispr.c
index a07896ca..bde7e63b 100644
--- a/src/wispr.c
+++ b/src/wispr.c
@@ -56,6 +56,7 @@ struct wispr_route {
};
struct connman_wispr_portal_context {
+ int refcount;
struct connman_service *service;
enum connman_ipconfig_type type;
struct connman_wispr_portal *wispr_portal;
@@ -97,6 +98,11 @@ static char *online_check_ipv4_url = NULL;
static char *online_check_ipv6_url = NULL;
static bool enable_online_to_ready_transition = false;
+#define wispr_portal_context_ref(wp_context) \
+ wispr_portal_context_ref_debug(wp_context, __FILE__, __LINE__, __func__)
+#define wispr_portal_context_unref(wp_context) \
+ wispr_portal_context_unref_debug(wp_context, __FILE__, __LINE__, __func__)
+
static void connman_wispr_message_init(struct connman_wispr_message *msg)
{
DBG("");
@@ -162,9 +168,6 @@ static void free_connman_wispr_portal_context(
{
DBG("context %p", wp_context);
- if (!wp_context)
- return;
-
if (wp_context->wispr_portal) {
if (wp_context->wispr_portal->ipv4_context == wp_context)
wp_context->wispr_portal->ipv4_context = NULL;
@@ -201,9 +204,38 @@ static void free_connman_wispr_portal_context(
g_free(wp_context);
}
+static struct connman_wispr_portal_context *
+wispr_portal_context_ref_debug(struct connman_wispr_portal_context *wp_context,
+ const char *file, int line, const char *caller)
+{
+ DBG("%p ref %d by %s:%d:%s()", wp_context,
+ wp_context->refcount + 1, file, line, caller);
+
+ __sync_fetch_and_add(&wp_context->refcount, 1);
+
+ return wp_context;
+}
+
+static void wispr_portal_context_unref_debug(
+ struct connman_wispr_portal_context *wp_context,
+ const char *file, int line, const char *caller)
+{
+ if (!wp_context)
+ return;
+
+ DBG("%p ref %d by %s:%d:%s()", wp_context,
+ wp_context->refcount - 1, file, line, caller);
+
+ if (__sync_fetch_and_sub(&wp_context->refcount, 1) != 1)
+ return;
+
+ free_connman_wispr_portal_context(wp_context);
+}
+
static struct connman_wispr_portal_context *create_wispr_portal_context(void)
{
- return g_try_new0(struct connman_wispr_portal_context, 1);
+ return wispr_portal_context_ref(
+ g_new0(struct connman_wispr_portal_context, 1));
}
static void free_connman_wispr_portal(gpointer data)
@@ -215,8 +247,8 @@ static void free_connman_wispr_portal(gpointer data)
if (!wispr_portal)
return;
- free_connman_wispr_portal_context(wispr_portal->ipv4_context);
- free_connman_wispr_portal_context(wispr_portal->ipv6_context);
+ wispr_portal_context_unref(wispr_portal->ipv4_context);
+ wispr_portal_context_unref(wispr_portal->ipv6_context);
g_free(wispr_portal);
}
@@ -452,7 +484,7 @@ static void portal_manage_status(GWebResult *result,
connman_info("Client-Timezone: %s", str);
if (!enable_online_to_ready_transition)
- free_connman_wispr_portal_context(wp_context);
+ wispr_portal_context_unref(wp_context);
__connman_service_ipconfig_indicate_state(service,
CONNMAN_SERVICE_STATE_ONLINE, type);
@@ -616,7 +648,7 @@ static void wispr_portal_request_wispr_login(struct connman_service *service,
return;
}
- free_connman_wispr_portal_context(wp_context);
+ wispr_portal_context_unref(wp_context);
return;
}
@@ -952,7 +984,7 @@ static int wispr_portal_detect(struct connman_wispr_portal_context *wp_context)
if (wp_context->token == 0) {
err = -EINVAL;
- free_connman_wispr_portal_context(wp_context);
+ wispr_portal_context_unref(wp_context);
}
} else if (wp_context->timeout == 0) {
wp_context->timeout = g_idle_add(no_proxy_callback, wp_context);
@@ -1001,7 +1033,7 @@ int __connman_wispr_start(struct connman_service *service,
/* If there is already an existing context, we wipe it */
if (wp_context)
- free_connman_wispr_portal_context(wp_context);
+ wispr_portal_context_unref(wp_context);
wp_context = create_wispr_portal_context();
if (!wp_context)
--
cgit

175
package/connman/0003-wispr-Update-portal-context-references.patch 100644
View File

@ -0,0 +1,175 @@
From 416bfaff988882c553c672e5bfc2d4f648d29e8a Mon Sep 17 00:00:00 2001
From: Daniel Wagner <wagi@monom.org>
Date: Tue, 5 Jul 2022 09:11:09 +0200
Subject: wispr: Update portal context references
Maintain proper portal context references to avoid UAF.
Fixes: CVE-2022-32293
[Retrieved from:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=416bfaff988882c553c672e5bfc2d4f648d29e8a]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
src/wispr.c | 34 ++++++++++++++++++++++------------
1 file changed, 22 insertions(+), 12 deletions(-)
diff --git a/src/wispr.c b/src/wispr.c
index bde7e63b..84bed33f 100644
--- a/src/wispr.c
+++ b/src/wispr.c
@@ -105,8 +105,6 @@ static bool enable_online_to_ready_transition = false;
static void connman_wispr_message_init(struct connman_wispr_message *msg)
{
- DBG("");
-
msg->has_error = false;
msg->current_element = NULL;
@@ -166,8 +164,6 @@ static void free_wispr_routes(struct connman_wispr_portal_context *wp_context)
static void free_connman_wispr_portal_context(
struct connman_wispr_portal_context *wp_context)
{
- DBG("context %p", wp_context);
-
if (wp_context->wispr_portal) {
if (wp_context->wispr_portal->ipv4_context == wp_context)
wp_context->wispr_portal->ipv4_context = NULL;
@@ -483,9 +479,6 @@ static void portal_manage_status(GWebResult *result,
&str))
connman_info("Client-Timezone: %s", str);
- if (!enable_online_to_ready_transition)
- wispr_portal_context_unref(wp_context);
-
__connman_service_ipconfig_indicate_state(service,
CONNMAN_SERVICE_STATE_ONLINE, type);
@@ -546,14 +539,17 @@ static void wispr_portal_request_portal(
{
DBG("");
+ wispr_portal_context_ref(wp_context);
wp_context->request_id = g_web_request_get(wp_context->web,
wp_context->status_url,
wispr_portal_web_result,
wispr_route_request,
wp_context);
- if (wp_context->request_id == 0)
+ if (wp_context->request_id == 0) {
wispr_portal_error(wp_context);
+ wispr_portal_context_unref(wp_context);
+ }
}
static bool wispr_input(const guint8 **data, gsize *length,
@@ -618,13 +614,15 @@ static void wispr_portal_browser_reply_cb(struct connman_service *service,
return;
if (!authentication_done) {
- wispr_portal_error(wp_context);
free_wispr_routes(wp_context);
+ wispr_portal_error(wp_context);
+ wispr_portal_context_unref(wp_context);
return;
}
/* Restarting the test */
__connman_service_wispr_start(service, wp_context->type);
+ wispr_portal_context_unref(wp_context);
}
static void wispr_portal_request_wispr_login(struct connman_service *service,
@@ -700,11 +698,13 @@ static bool wispr_manage_message(GWebResult *result,
wp_context->wispr_result = CONNMAN_WISPR_RESULT_LOGIN;
+ wispr_portal_context_ref(wp_context);
if (__connman_agent_request_login_input(wp_context->service,
wispr_portal_request_wispr_login,
- wp_context) != -EINPROGRESS)
+ wp_context) != -EINPROGRESS) {
wispr_portal_error(wp_context);
- else
+ wispr_portal_context_unref(wp_context);
+ } else
return true;
break;
@@ -753,6 +753,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
if (length > 0) {
g_web_parser_feed_data(wp_context->wispr_parser,
chunk, length);
+ wispr_portal_context_unref(wp_context);
return true;
}
@@ -770,6 +771,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
switch (status) {
case 000:
+ wispr_portal_context_ref(wp_context);
__connman_agent_request_browser(wp_context->service,
wispr_portal_browser_reply_cb,
wp_context->status_url, wp_context);
@@ -781,11 +783,14 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
if (g_web_result_get_header(result, "X-ConnMan-Status",
&str)) {
portal_manage_status(result, wp_context);
+ wispr_portal_context_unref(wp_context);
return false;
- } else
+ } else {
+ wispr_portal_context_ref(wp_context);
__connman_agent_request_browser(wp_context->service,
wispr_portal_browser_reply_cb,
wp_context->redirect_url, wp_context);
+ }
break;
case 300:
@@ -798,6 +803,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
!g_web_result_get_header(result, "Location",
&redirect)) {
+ wispr_portal_context_ref(wp_context);
__connman_agent_request_browser(wp_context->service,
wispr_portal_browser_reply_cb,
wp_context->status_url, wp_context);
@@ -808,6 +814,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
wp_context->redirect_url = g_strdup(redirect);
+ wispr_portal_context_ref(wp_context);
wp_context->request_id = g_web_request_get(wp_context->web,
redirect, wispr_portal_web_result,
wispr_route_request, wp_context);
@@ -820,6 +827,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
break;
case 505:
+ wispr_portal_context_ref(wp_context);
__connman_agent_request_browser(wp_context->service,
wispr_portal_browser_reply_cb,
wp_context->status_url, wp_context);
@@ -832,6 +840,7 @@ static bool wispr_portal_web_result(GWebResult *result, gpointer user_data)
wp_context->request_id = 0;
done:
wp_context->wispr_msg.message_type = -1;
+ wispr_portal_context_unref(wp_context);
return false;
}
@@ -890,6 +899,7 @@ static void proxy_callback(const char *proxy, void *user_data)
xml_wispr_parser_callback, wp_context);
wispr_portal_request_portal(wp_context);
+ wispr_portal_context_unref(wp_context);
}
static gboolean no_proxy_callback(gpointer user_data)
--
cgit

7
package/connman/connman.mk
View File

@ -13,6 +13,13 @@ CONNMAN_LICENSE = GPL-2.0
CONNMAN_LICENSE_FILES = COPYING
CONNMAN_CPE_ID_VENDOR = intel
# 0001-gweb-Fix-OOB-write-in-received_data.patch
CONNMAN_IGNORE_CVES += CVE-2022-32292
# 0002-wispr-Add-reference-counter-to-portal-context.patch
# 0003-wispr-Update-portal-context-references.patch
CONNMAN_IGNORE_CVES += CVE-2022-32293
CONNMAN_CONF_OPTS = --with-dbusconfdir=/etc
ifeq ($(BR2_INIT_SYSTEMD),y)