[Buildroot] [git commit branch/2022.02.x] package/connman: fix CVE-2022-3229{2, 3}
Peter Korsgaard
peter at korsgaard.com
Fri Dec 16 14:21:28 UTC 2022
commit: https://git.buildroot.net/buildroot/commit/?id=2d32b043a60c1a4400e90d7127fdf66a84e6b322
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2022.02.x
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 at gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
(cherry picked from commit 2f2b4c80f44ac0da88fc087017d495e627131350)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
.../0001-gweb-Fix-OOB-write-in-received_data.patch | 36 +++++
...r-Add-reference-counter-to-portal-context.patch | 142 +++++++++++++++++
...03-wispr-Update-portal-context-references.patch | 175 +++++++++++++++++++++
package/connman/connman.mk | 7 +
4 files changed, 360 insertions(+)
diff --git a/package/connman/0001-gweb-Fix-OOB-write-in-received_data.patch b/package/connman/0001-gweb-Fix-OOB-write-in-received_data.patch
new file mode 100644
index 0000000000..d1a9d8f8fe
--- /dev/null
+++ b/package/connman/0001-gweb-Fix-OOB-write-in-received_data.patch
@@ -0,0 +1,36 @@
+From d1a5ede5d255bde8ef707f8441b997563b9312bd Mon Sep 17 00:00:00 2001
+From: Nathan Crandall <ncrandall at 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 at 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
+
diff --git a/package/connman/0002-wispr-Add-reference-counter-to-portal-context.patch b/package/connman/0002-wispr-Add-reference-counter-to-portal-context.patch
new file mode 100644
index 0000000000..c2cebdfdcc
--- /dev/null
+++ b/package/connman/0002-wispr-Add-reference-counter-to-portal-context.patch
@@ -0,0 +1,142 @@
+From 72343929836de80727a27d6744c869dff045757c Mon Sep 17 00:00:00 2001
+From: Daniel Wagner <wagi at 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 at 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
+
diff --git a/package/connman/0003-wispr-Update-portal-context-references.patch b/package/connman/0003-wispr-Update-portal-context-references.patch
new file mode 100644
index 0000000000..61c4e21f94
--- /dev/null
+++ b/package/connman/0003-wispr-Update-portal-context-references.patch
@@ -0,0 +1,175 @@
+From 416bfaff988882c553c672e5bfc2d4f648d29e8a Mon Sep 17 00:00:00 2001
+From: Daniel Wagner <wagi at 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 at 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
+
diff --git a/package/connman/connman.mk b/package/connman/connman.mk
index a76a339e6f..fbd7318e4e 100644
--- a/package/connman/connman.mk
+++ b/package/connman/connman.mk
@@ -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)
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