diff options
author | Benjamin Keith Ford <bford@digium.com> | 2017-07-07 11:19:13 -0500 |
---|---|---|
committer | Benjamin Keith Ford <bford@digium.com> | 2017-07-10 09:55:05 -0500 |
commit | 8f72128e661c34b626a71d25fd0d2e9d694e51ba (patch) | |
tree | cd5e64ba6ef55bcb23dcd29e9044a26225dbd1f4 /res/res_pjsip/pjsip_configuration.c | |
parent | 17103ca898f077846c4b1430091ba37454476844 (diff) |
res_pjsip: Fix crash with from_user containing invalid characters.
If the from_user field contains certain characters (like @, {, ^, etc.),
PJSIP will return a null value for the URI when attempting to parse it.
This causes a crash when trying to dial out through a trunk that contains
these invalid characters in its from_user field.
This change checks the configuration and ensures that an endpoint will
not be created if the from_user contains an invalid character. It also
adds a null check to the PJSIP URI parsing as a backup.
ASTERISK-27036 #close
Reported by: Maxim Vasilev
Change-Id: I0396fdb5080604e0bdf1277464d5c8a85db913d0
Diffstat (limited to 'res/res_pjsip/pjsip_configuration.c')
-rw-r--r-- | res/res_pjsip/pjsip_configuration.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/res/res_pjsip/pjsip_configuration.c b/res/res_pjsip/pjsip_configuration.c index 372b01bc8..ef3e05b06 100644 --- a/res/res_pjsip/pjsip_configuration.c +++ b/res/res_pjsip/pjsip_configuration.c @@ -1148,6 +1148,37 @@ static int tos_video_to_str(const void *obj, const intptr_t *args, char **buf) return 0; } +static int from_user_handler(const struct aco_option *opt, + struct ast_variable *var, void *obj) +{ + struct ast_sip_endpoint *endpoint = obj; + /* Valid non-alphanumeric characters for URI */ + char *valid_uri_marks = "-_.!~*`()"; + const char *val; + + for (val = var->value; *val; val++) { + if (!strchr(valid_uri_marks, *val) && !isdigit(*val) && !isalpha(*val)) { + ast_log(LOG_ERROR, "Error configuring endpoint '%s' - '%s' field " + "contains invalid character '%c'\n", + ast_sorcery_object_get_id(endpoint), var->name, *val); + return -1; + } + } + + ast_string_field_set(endpoint, fromuser, var->value); + + return 0; +} + +static int from_user_to_str(const void *obj, const intptr_t *args, char **buf) +{ + const struct ast_sip_endpoint *endpoint = obj; + + *buf = ast_strdup(endpoint->fromuser); + + return 0; +} + static int set_var_handler(const struct aco_option *opt, struct ast_variable *var, void *obj) { @@ -1918,7 +1949,7 @@ int ast_res_pjsip_initialize_configuration(void) ast_sorcery_object_field_register(sip_sorcery, "endpoint", "cos_video", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, media.cos_video)); ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_subscribe", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, subscription.allow)); ast_sorcery_object_field_register(sip_sorcery, "endpoint", "sub_min_expiry", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_endpoint, subscription.minexpiry)); - ast_sorcery_object_field_register(sip_sorcery, "endpoint", "from_user", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, fromuser)); + ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "from_user", "", from_user_handler, from_user_to_str, NULL, 0, 0); ast_sorcery_object_field_register(sip_sorcery, "endpoint", "from_domain", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, fromdomain)); ast_sorcery_object_field_register(sip_sorcery, "endpoint", "mwi_from_user", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, subscription.mwi.fromuser)); ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtp_engine", "asterisk", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_endpoint, media.rtp.engine)); |