zabbix: fix CVE-2023-29449

JavaScript preprocessing, webhooks and global scripts can cause
uncontrolled CPU, memory, and disk I/O utilization.
Preprocessing/webhook/global script configuration and testing
are only available to Administrative roles (Admin and Superadmin).
Administrative privileges should be typically granted to users
who need to perform tasks that require more control over the system.
The security risk is limited because not all users have this level
of access.

References:
https://support.zabbix.com/browse/ZBX-22589

Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 248 insertions, 0 deletions

diff --git a/meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-29449.patch b/meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-29449.patch
new file mode 100644
index 0000000000..675d9e0f35
--- /dev/null
+++ b/meta-oe/recipes-connectivity/zabbix/zabbix/CVE-2023-29449.patch
@@ -0,0 +1,247 @@
+From 240754ccee1b6b35ac47862be56dacec11e65b32 Mon Sep 17 00:00:00 2001
+From: Dmitrijs Goloscapovs <dmitrijs.goloscapovs@zabbix.com>
+Date: Thu, 27 Jul 2023 11:23:54 +0000
+Subject: [PATCH] .......PS. [DEV-2387] added new limits for JS objects
+
+Merge in ZBX/zabbix from feature/DEV-2387-6.0 to release/6.0
+
+* commit '16e5f15a70cfbf00c646cb92d1fcb8a362900285':
+  .......PS. [DEV-2387] removed logsize check based on json buffer
+  .......PS. [DEV-2387] removed logsize check based on json buffer
+  .......PS. [DEV-2387] fixed pr comments
+  .......PS. [DEV-2387] removed useless include
+  .......PS. [DEV-2387] added limits for logging and adding httprequest headers
+  .......PS. [DEV-2387] limited initialization of new HttpRequest objects
+
+CVE: CVE-2023-29449
+
+Upstream-Status: Backport [https://git.zabbix.com/projects/ZBX/repos/zabbix/commits/240754ccee1]
+
+Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
+---
+ src/libs/zbxembed/console.c     | 23 ++++++++++++-----------
+ src/libs/zbxembed/embed.c       |  1 +
+ src/libs/zbxembed/embed.h       |  3 +++
+ src/libs/zbxembed/httprequest.c | 28 ++++++++++++++++++++++++++++
+ src/libs/zbxembed/zabbix.c      | 23 ++++++++++++-----------
+ 5 files changed, 56 insertions(+), 22 deletions(-)
+
+diff --git a/src/libs/zbxembed/console.c b/src/libs/zbxembed/console.c
+index c733487..60c48fc 100644
+--- a/src/libs/zbxembed/console.c
++++ b/src/libs/zbxembed/console.c
+@@ -90,27 +90,28 @@ static duk_ret_t    es_log_message(duk_context *ctx, int level)
+        else
+                msg_output = zbx_strdup(msg_output, "undefined");
+
+-       zabbix_log(level, "%s", msg_output);
+-
+        duk_get_memory_functions(ctx, &out_funcs);
+        env = (zbx_es_env_t *)out_funcs.udata;
+
+-       if (NULL == env->json)
+-               goto out;
+-
+-       if (ZBX_ES_LOG_MEMORY_LIMIT < env->json->buffer_size)   /* approximate limit */
++       if (ZBX_ES_LOG_MEMORY_LIMIT < env->log_size)
+        {
+                err_index = duk_push_error_object(ctx, DUK_RET_EVAL_ERROR, "log exceeds the maximum size of "
+                                ZBX_FS_UI64 " bytes.", ZBX_ES_LOG_MEMORY_LIMIT);
+                goto out;
+        }
+
+-       zbx_json_addobject(env->json, NULL);
+-       zbx_json_adduint64(env->json, "level", (zbx_uint64_t)level);
+-       zbx_json_adduint64(env->json, "ms", zbx_get_duration_ms(&env->start_time));
+-       zbx_json_addstring(env->json, "message", msg_output, ZBX_JSON_TYPE_STRING);
+-       zbx_json_close(env->json);
++       zabbix_log(level, "%s", msg_output);
++
++       if (NULL != env->json)
++       {
++               zbx_json_addobject(env->json, NULL);
++               zbx_json_adduint64(env->json, "level", (zbx_uint64_t)level);
++               zbx_json_adduint64(env->json, "ms", zbx_get_duration_ms(&env->start_time));
++               zbx_json_addstring(env->json, "message", msg_output, ZBX_JSON_TYPE_STRING);
++               zbx_json_close(env->json);
++       }
+ out:
++       env->log_size += strlen(msg_output);
+        zbx_free(msg_output);
+
+        if (-1 != err_index)
+diff --git a/src/libs/zbxembed/embed.c b/src/libs/zbxembed/embed.c
+index 34d8d18..cc80925 100644
+--- a/src/libs/zbxembed/embed.c
++++ b/src/libs/zbxembed/embed.c
+@@ -444,6 +444,7 @@ int zbx_es_execute(zbx_es_t *es, const char *script, const char *code, int size,
+        zabbix_log(LOG_LEVEL_DEBUG, "In %s() param:%s", __func__, param);
+
+        zbx_timespec(&es->env->start_time);
++       es->env->http_req_objects = 0;
+
+        if (NULL != es->env->json)
+        {
+diff --git a/src/libs/zbxembed/embed.h b/src/libs/zbxembed/embed.h
+index a0a360c..2b954a8 100644
+--- a/src/libs/zbxembed/embed.h
++++ b/src/libs/zbxembed/embed.h
+@@ -48,6 +48,9 @@ struct zbx_es_env
+        struct zbx_json *json;
+
+        jmp_buf         loc;
++
++       int             http_req_objects;
++       size_t          log_size;
+ };
+
+ zbx_es_env_t   *zbx_es_get_env(duk_context *ctx);
+diff --git a/src/libs/zbxembed/httprequest.c b/src/libs/zbxembed/httprequest.c
+index 8c2839c..7f0eed9 100644
+--- a/src/libs/zbxembed/httprequest.c
++++ b/src/libs/zbxembed/httprequest.c
+@@ -52,6 +52,7 @@ typedef struct
+        size_t                  headers_in_alloc;
+        size_t                  headers_in_offset;
+        unsigned char           custom_header;
++       size_t                  headers_sz;
+ }
+ zbx_es_httprequest_t;
+
+@@ -145,13 +146,21 @@ static duk_ret_t  es_httprequest_dtor(duk_context *ctx)
+  ******************************************************************************/
+ static duk_ret_t       es_httprequest_ctor(duk_context *ctx)
+ {
++#define MAX_HTTPREQUEST_OBJECT_COUNT   10
+        zbx_es_httprequest_t    *request;
+        CURLcode                err;
++       zbx_es_env_t            *env;
+        int                     err_index = -1;
+
+        if (!duk_is_constructor_call(ctx))
+                return DUK_RET_TYPE_ERROR;
+
++       if (NULL == (env = zbx_es_get_env(ctx)))
++               return duk_error(ctx, DUK_RET_TYPE_ERROR, "cannot access internal environment");
++
++       if (MAX_HTTPREQUEST_OBJECT_COUNT == env->http_req_objects)
++               return duk_error(ctx, DUK_RET_EVAL_ERROR, "maximum count of HttpRequest objects was reached");
++
+        duk_push_this(ctx);
+
+        request = (zbx_es_httprequest_t *)zbx_malloc(NULL, sizeof(zbx_es_httprequest_t));
+@@ -189,7 +198,10 @@ out:
+                return duk_throw(ctx);
+        }
+
++       env->http_req_objects++;
++
+        return 0;
++#undef MAX_HTTPREQUEST_OBJECT_COUNT
+ }
+
+ /******************************************************************************
+@@ -201,10 +213,12 @@ out:
+  ******************************************************************************/
+ static duk_ret_t       es_httprequest_add_header(duk_context *ctx)
+ {
++#define ZBX_ES_MAX_HEADERS_SIZE        ZBX_KIBIBYTE * 128
+        zbx_es_httprequest_t    *request;
+        CURLcode                err;
+        char                    *utf8 = NULL;
+        int                     err_index = -1;
++       size_t                  header_sz;
+
+        if (NULL == (request = es_httprequest(ctx)))
+                return duk_error(ctx, DUK_RET_EVAL_ERROR, "internal scripting error: null object");
+@@ -215,9 +229,20 @@ static duk_ret_t   es_httprequest_add_header(duk_context *ctx)
+                goto out;
+        }
+
++       header_sz = strlen(utf8);
++
++       if (ZBX_ES_MAX_HEADERS_SIZE < request->headers_sz + header_sz)
++       {
++               err_index = duk_push_error_object(ctx, DUK_RET_TYPE_ERROR, "headers exceeded maximum size of "
++                       ZBX_FS_UI64 " bytes.", ZBX_ES_MAX_HEADERS_SIZE);
++
++               goto out;
++       }
++
+        request->headers = curl_slist_append(request->headers, utf8);
+        ZBX_CURL_SETOPT(ctx, request->handle, CURLOPT_HTTPHEADER, request->headers, err);
+        request->custom_header = 1;
++       request->headers_sz += header_sz + 1;
+ out:
+        zbx_free(utf8);
+
+@@ -225,6 +250,7 @@ out:
+                return duk_throw(ctx);
+
+        return 0;
++#undef ZBX_ES_MAX_HEADERS_SIZE
+ }
+
+ /******************************************************************************
+@@ -244,6 +270,7 @@ static duk_ret_t    es_httprequest_clear_header(duk_context *ctx)
+        curl_slist_free_all(request->headers);
+        request->headers = NULL;
+        request->custom_header = 0;
++       request->headers_sz = 0;
+
+        return 0;
+ }
+@@ -311,6 +338,7 @@ static duk_ret_t    es_httprequest_query(duk_context *ctx, const char *http_request
+                {
+                        curl_slist_free_all(request->headers);
+                        request->headers = NULL;
++                       request->headers_sz = 0;
+                }
+
+                if (NULL != contents)
+diff --git a/src/libs/zbxembed/zabbix.c b/src/libs/zbxembed/zabbix.c
+index 820768f..0ecde86 100644
+--- a/src/libs/zbxembed/zabbix.c
++++ b/src/libs/zbxembed/zabbix.c
+@@ -81,27 +81,28 @@ static duk_ret_t    es_zabbix_log(duk_context *ctx)
+                zbx_replace_invalid_utf8(message);
+        }
+
+-       zabbix_log(level, "%s", message);
+-
+        duk_get_memory_functions(ctx, &out_funcs);
+        env = (zbx_es_env_t *)out_funcs.udata;
+
+-       if (NULL == env->json)
+-               goto out;
+-
+-       if (ZBX_ES_LOG_MEMORY_LIMIT < env->json->buffer_size)   /* approximate limit */
++       if (ZBX_ES_LOG_MEMORY_LIMIT < env->log_size)
+        {
+                err_index = duk_push_error_object(ctx, DUK_RET_EVAL_ERROR, "log exceeds the maximum size of "
+                                ZBX_FS_UI64 " bytes.", ZBX_ES_LOG_MEMORY_LIMIT);
+                goto out;
+        }
+
+-       zbx_json_addobject(env->json, NULL);
+-       zbx_json_adduint64(env->json, "level", (zbx_uint64_t)level);
+-       zbx_json_adduint64(env->json, "ms", zbx_get_duration_ms(&env->start_time));
+-       zbx_json_addstring(env->json, "message", message, ZBX_JSON_TYPE_STRING);
+-       zbx_json_close(env->json);
++       zabbix_log(level, "%s", message);
++
++       if (NULL != env->json)
++       {
++               zbx_json_addobject(env->json, NULL);
++               zbx_json_adduint64(env->json, "level", (zbx_uint64_t)level);
++               zbx_json_adduint64(env->json, "ms", zbx_get_duration_ms(&env->start_time));
++               zbx_json_addstring(env->json, "message", message, ZBX_JSON_TYPE_STRING);
++               zbx_json_close(env->json);
++       }
+ out:
++       env->log_size += strlen(message);
+        zbx_free(message);
+
+        if (-1 != err_index)
+--
+2.35.5
diff --git a/meta-oe/recipes-connectivity/zabbix/zabbix_5.4.12.bb b/meta-oe/recipes-connectivity/zabbix/zabbix_5.4.12.bb
index 7f530a5529..c373ed9f0c 100644
--- a/meta-oe/recipes-connectivity/zabbix/zabbix_5.4.12.bb
+++ b/meta-oe/recipes-connectivity/zabbix/zabbix_5.4.12.bb
@@ -29,6 +29,7 @@ SRC_URI = "https://cdn.zabbix.com/zabbix/sources/stable/5.4/${BPN}-${PV}.tar.gz
     file://CVE-2022-43515.patch \
     file://CVE-2022-46768.patch \
     file://CVE-2023-29451.patch \
+    file://CVE-2023-29449.patch \
 "
 
 SRC_URI[md5sum] = "f295fd2df86143d72f6ff26e47d9e39e"