1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
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
|