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apache2.13781
apache2-CVE-2019-0220.patch
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File apache2-CVE-2019-0220.patch of Package apache2.13781
Index: httpd-2.4.33/server/core.c =================================================================== --- httpd-2.4.33.orig/server/core.c 2019-04-02 16:19:19.749373816 +0200 +++ httpd-2.4.33/server/core.c 2019-04-02 16:20:17.197652884 +0200 @@ -490,6 +490,7 @@ static void *create_core_server_config(a conf->protocols = apr_array_make(a, 5, sizeof(const char *)); conf->protocols_honor_order = -1; + conf->merge_slashes = AP_CORE_CONFIG_UNSET; return (void *)conf; } @@ -561,6 +562,7 @@ static void *merge_core_server_configs(a conf->protocols_honor_order = ((virt->protocols_honor_order < 0)? base->protocols_honor_order : virt->protocols_honor_order); + AP_CORE_MERGE_FLAG(merge_slashes, conf, base, virt); return conf; } @@ -1869,6 +1871,13 @@ static const char *set_qualify_redirect_ return NULL; } +static const char *set_core_server_flag(cmd_parms *cmd, void *s_, int flag) +{ + core_server_config *conf = + ap_get_core_module_config(cmd->server->module_config); + return ap_set_flag_slot(cmd, conf, flag); +} + static const char *set_override_list(cmd_parms *cmd, void *d_, int argc, char *const argv[]) { core_dir_config *d = d_; @@ -4587,6 +4596,10 @@ AP_INIT_ITERATE("HttpProtocolOptions", s "'Unsafe' or 'Strict' (default). Sets HTTP acceptance rules"), AP_INIT_ITERATE("RegisterHttpMethod", set_http_method, NULL, RSRC_CONF, "Registers non-standard HTTP methods"), +AP_INIT_FLAG("MergeSlashes", set_core_server_flag, + (void *)APR_OFFSETOF(core_server_config, merge_slashes), + RSRC_CONF, + "Controls whether consecutive slashes in the URI path are merged"), { NULL } }; Index: httpd-2.4.33/include/httpd.h =================================================================== --- httpd-2.4.33.orig/include/httpd.h 2019-04-02 16:19:19.797374052 +0200 +++ httpd-2.4.33/include/httpd.h 2019-04-02 16:20:17.197652884 +0200 @@ -1697,12 +1697,22 @@ AP_DECLARE(int) ap_unescape_url_keep2f(c AP_DECLARE(int) ap_unescape_urlencoded(char *query); /** - * Convert all double slashes to single slashes - * @param name The string to convert + * Convert all double slashes to single slashes, except where significant + * to the filesystem on the current platform. + * @param name The string to convert, assumed to be a filesystem path */ AP_DECLARE(void) ap_no2slash(char *name); /** + * Convert all double slashes to single slashes, except where significant + * to the filesystem on the current platform. + * @param name The string to convert + * @param is_fs_path if set to 0, the significance of any double-slashes is + * ignored. + */ +AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path); + +/** * Remove all ./ and xx/../ substrings from a file name. Also remove * any leading ../ or /../ substrings. * @param name the file name to parse Index: httpd-2.4.33/include/http_core.h =================================================================== --- httpd-2.4.33.orig/include/http_core.h 2019-04-02 16:19:19.753373836 +0200 +++ httpd-2.4.33/include/http_core.h 2019-04-02 16:19:19.869374404 +0200 @@ -750,7 +750,7 @@ typedef struct { #define AP_HTTP_METHODS_LENIENT 1 #define AP_HTTP_METHODS_REGISTERED 2 char http_methods; - + unsigned int merge_slashes; } core_server_config; /* for AddOutputFiltersByType in core.c */ Index: httpd-2.4.33/server/util.c =================================================================== --- httpd-2.4.33.orig/server/util.c 2017-10-10 13:25:14.000000000 +0200 +++ httpd-2.4.33/server/util.c 2019-04-02 16:20:00.277570868 +0200 @@ -561,16 +561,20 @@ AP_DECLARE(void) ap_getparents(char *nam name[l] = '\0'; } } - -AP_DECLARE(void) ap_no2slash(char *name) +AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path) { + char *d, *s; + if (!name || !*name) { + return; + } + s = d = name; #ifdef HAVE_UNC_PATHS /* Check for UNC names. Leave leading two slashes. */ - if (s[0] == '/' && s[1] == '/') + if (is_fs_path && s[0] == '/' && s[1] == '/') *d++ = *s++; #endif @@ -587,6 +591,10 @@ AP_DECLARE(void) ap_no2slash(char *name) *d = '\0'; } +AP_DECLARE(void) ap_no2slash(char *name) +{ + ap_no2slash_ex(name, 1); +} /* * copy at most n leading directories of s into d Index: httpd-2.4.33/server/request.c =================================================================== --- httpd-2.4.33.orig/server/request.c 2019-04-02 16:19:19.617373171 +0200 +++ httpd-2.4.33/server/request.c 2019-04-02 16:20:17.197652884 +0200 @@ -170,6 +170,8 @@ AP_DECLARE(int) ap_process_request_inter int file_req = (r->main && r->filename); int access_status; core_dir_config *d; + core_server_config *sconf = + ap_get_core_module_config(r->server->module_config); /* Ignore embedded %2F's in path for proxy requests */ if (!r->proxyreq && r->parsed_uri.path) { @@ -194,6 +196,12 @@ AP_DECLARE(int) ap_process_request_inter } ap_getparents(r->uri); /* OK --- shrinking transformations... */ + if (sconf->merge_slashes != AP_CORE_CONFIG_OFF) { + ap_no2slash(r->uri); + if (r->parsed_uri.path) { + ap_no2slash(r->parsed_uri.path); + } + } /* All file subrequests are a huge pain... they cannot bubble through the * next several steps. Only file subrequests are allowed an empty uri, @@ -1414,20 +1422,7 @@ AP_DECLARE(int) ap_location_walk(request cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r); cached = (cache->cached != NULL); - - /* Location and LocationMatch differ on their behaviour w.r.t. multiple - * slashes. Location matches multiple slashes with a single slash, - * LocationMatch doesn't. An exception, for backwards brokenness is - * absoluteURIs... in which case neither match multiple slashes. - */ - if (r->uri[0] != '/') { - entry_uri = r->uri; - } - else { - char *uri = apr_pstrdup(r->pool, r->uri); - ap_no2slash(uri); - entry_uri = uri; - } + entry_uri = r->uri; /* If we have an cache->cached location that matches r->uri, * and the vhost's list of locations hasn't changed, we can skip @@ -1494,7 +1489,7 @@ AP_DECLARE(int) ap_location_walk(request pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t)); } - if (ap_regexec(entry_core->r, r->uri, nmatch, pmatch, 0)) { + if (ap_regexec(entry_core->r, entry_uri, nmatch, pmatch, 0)) { continue; } @@ -1504,7 +1499,7 @@ AP_DECLARE(int) ap_location_walk(request apr_table_setn(r->subprocess_env, ((const char **)entry_core->refs->elts)[i], apr_pstrndup(r->pool, - r->uri + pmatch[i].rm_so, + entry_uri + pmatch[i].rm_so, pmatch[i].rm_eo - pmatch[i].rm_so)); } }
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