(c54bce8c) · Commits · CYBER - Cyber Security / TS 103 523 MSP / TLMSP / TLMSP Apache Httpd

CHANGES

+10 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,16 @@ Changes with Apache 2.0.65
		is enabled, could allow local users to gain privileges via a .htaccess
		file. [Stefan Fritsch, Greg Ames]

		*) mod_rewrite: Allow merging RewriteBase down to subdirectories
		if new option 'RewriteOptions MergeBase' is configured.
		[Eric Covener]

		*) mod_rewrite: Fix the RewriteEngine directive to work within a
		location. Previously, once RewriteEngine was switched on globally,
		it was impossible to switch off. [Graham Leggett]

		*) mod_rewrite: Add "AllowAnyURI" option. PR 52774. [Joe Orton]

		*) htdigest: Fix buffer overflow when reading digest password file
		with very long lines. PR 54893. [Rainer Jung]

STATUS

+0 −23

Original line number	Diff line number	Diff line
		@@ -164,29 +164,6 @@ RELEASE SHOWSTOPPERS:
		PATCHES ACCEPTED TO BACKPORT FROM TRUNK:
		[ start all new proposals below, under PATCHES PROPOSED. ]

		* Add AllowAnyURI, fix mod_rewrite configuration in Location.
		Patch must be applied on top of the CVE-2011-4317 patch above.
		Note that I added a minor MMN bump, since in 2.0 the structure definitions
		are in mod_rewrite.h and not in mod_rewrite.c, so the needed change IMHO
		is public and needs a bump.
		trunk patch: http://svn.apache.org/viewvc?view=revision&revision=1356115 and
		http://svn.apache.org/viewvc?view=revision&revision=1356813 and
		http://svn.apache.org/viewvc?view=revision&revision=1086662 and
		http://svn.apache.org/viewvc?view=revision&revision=1032431 and
		http://svn.apache.org/viewvc?view=revision&revision=1410681 and
		http://svn.apache.org/viewvc?view=revision&revision=1447426
		2.4.x patch: http://svn.apache.org/viewvc?view=revision&revision=1359687 and
		http://svn.apache.org/viewvc?view=revision&revision=1086662 and
		http://svn.apache.org/viewvc?view=revision&revision=1032431 and
		http://svn.apache.org/viewvc?view=revision&revision=1418954 and
		http://svn.apache.org/viewvc?view=revision&revision=1447448
		2.2.x patch: http://svn.apache.org/viewvc?rev=1375113&view=rev and
		http://svn.apache.org/viewvc?rev=1447508&view=rev
		2.0.x patch: http://people.apache.org/~rjung/patches/2.0-AllowAnyURI-v3.patch
		+1: rjung, wrowe, covener
		rjung: I backported the MergeBase option plus no merging as default form 2.2.
		2.0-AllowAnyURI-v3.patch contains that now.

		* byterange: Backport MaxRanges configuration directive and
		ap_set_accept_ranges() utility function.
		Trunk patch: http://svn.apache.org/viewvc?view=revision&revision=1162584

docs/manual/mod/mod_rewrite.xml

+43 −0

Original line number	Diff line number	Diff line
		@@ -271,7 +271,50 @@ later</compatibility>
		responds with an 500 Internal Server Error. If you really need
		more internal redirects than 10 per request, you may increase
		the default to the desired value.</dd>

		<dt><code>AllowAnyURI</code></dt>
		<dd>

		<p>When <directive module="mod_rewrite">RewriteRule</directive>
		is used in <code>VirtualHost</code> or server context with
		version 2.0.65 or later of httpd, <module>mod_rewrite</module>
		will only process the rewrite rules if the request URI is a <a
		href="./directive-dict.html#Syntax">URL-path</a>. This avoids
		some security issues where particular rules could allow
		"surprising" pattern expansions (see <a
		href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3368">CVE-2011-3368</a>
		and <a
		href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4317">CVE-2011-4317</a>).
		To lift the restriction on matching a URL-path, the
		<code>AllowAnyURI</code> option can be enabled, and
		<module>mod_rewrite</module> will apply the rule set to any
		request URI string, regardless of whether that string matches
		the URL-path grammar required by the HTTP specification.</p>

		<note type="warning">
		<title>Security Warning</title>

		<p>Enabling this option will make the server vulnerable to
		security issues if used with rewrite rules which are not
		carefully authored. It is <strong>strongly recommended</strong>
		that this option is not used. In particular, beware of input
		strings containing the '<code>@</code>' character which could
		change the interpretation of the transformed URI, as per the
		above CVE names.</p>
		</note>
		</dd>

		<dt><code>MergeBase</code></dt>
		<dd>

		<p>With this option, the value of <directive module="mod_rewrite"
		>RewriteBase</directive> is copied from where it's explicitly defined
		into any sub-directory or sub-location that doesn't define its own
		<directive module="mod_rewrite">RewriteBase</directive>.
		This flag is available for Apache HTTP Server 2.0.65 and later.</p>
		</dd>
		</dl>

		</usage>

		</directivesynopsis>

include/ap_mmn.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -88,6 +88,8 @@
		* 20020903.12 (2.0.56-dev) added ap_get_server_revision / ap_version_t
		* 20020903.13 (2.0.62-dev) Add *ftp_directory_charset to proxy_dir_conf
		* 20020903.14 (2.0.64-dev) added ap_vhost_iterate_given_conn
		* 20020903.15 (2.0.65-dev) added state_set, options_set, baseurl_set to
		* rewrite_server_conf and rewrite_perdir_conf
		*/

		#define MODULE_MAGIC_COOKIE 0x41503230UL /* "AP20" */
		@@ -95,7 +97,7 @@
		#ifndef MODULE_MAGIC_NUMBER_MAJOR
		#define MODULE_MAGIC_NUMBER_MAJOR 20020903
		#endif
		#define MODULE_MAGIC_NUMBER_MINOR 14 /* 0...n */
		#define MODULE_MAGIC_NUMBER_MINOR 15 /* 0...n */

		/**
		* Determine if the server's current MODULE_MAGIC_NUMBER is at least a

modules/mappers/mod_rewrite.c

+69 −19

Original line number	Diff line number	Diff line
		@@ -191,8 +191,11 @@ static void config_server_merge(apr_pool_t p, void basev, void overridesv)
		base = (rewrite_server_conf *)basev;
		overrides = (rewrite_server_conf *)overridesv;

		a->state = overrides->state;
		a->options = overrides->options;
		a->state = (overrides->state_set == 0) ? base->state : overrides->state;
		a->state_set = overrides->state_set \|\| base->state_set;
		a->options = (overrides->options_set == 0) ? base->options : overrides->options;
		a->options_set = overrides->options_set \|\| base->options_set;

		a->server = overrides->server;
		a->redirect_limit = overrides->redirect_limit
		? overrides->redirect_limit
		@@ -280,14 +283,24 @@ static void config_perdir_merge(apr_pool_t p, void basev, void overridesv)
		base = (rewrite_perdir_conf *)basev;
		overrides = (rewrite_perdir_conf *)overridesv;

		a->state = overrides->state;
		a->options = overrides->options;
		a->directory = overrides->directory;
		a->baseurl = overrides->baseurl;
		a->state = (overrides->state_set == 0) ? base->state : overrides->state;
		a->state_set = overrides->state_set \|\| base->state_set;
		a->options = (overrides->options_set == 0) ? base->options : overrides->options;
		a->options_set = overrides->options_set \|\| base->options_set;
		a->redirect_limit = overrides->redirect_limit
		? overrides->redirect_limit
		: base->redirect_limit;

		if (a->options & OPTION_MERGEBASE) {
		a->baseurl = (overrides->baseurl_set == 0) ? base->baseurl : overrides->baseurl;
		a->baseurl_set = overrides->baseurl_set \|\| base->baseurl_set;
		}
		else {
		a->baseurl = overrides->baseurl;
		}

		a->directory = overrides->directory;

		if (a->options & OPTION_INHERIT) {
		a->rewriteconds = apr_array_append(p, overrides->rewriteconds,
		base->rewriteconds);
		@@ -317,11 +330,17 @@ static const char cmd_rewriteengine(cmd_parms cmd,

		sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);

		if (cmd->path == NULL) { /* is server command */
		/* server command? set both global scope and base directory scope */
		if (cmd->path == NULL) {
		sconf->state = (flag ? ENGINE_ENABLED : ENGINE_DISABLED);
		sconf->state_set = 1;
		dconf->state = sconf->state;
		dconf->state_set = 1;
		}
		else /* is per-directory command */ {
		/* directory command? set directory scope only */
		else {
		dconf->state = (flag ? ENGINE_ENABLED : ENGINE_DISABLED);
		dconf->state_set = 1;
		}

		return NULL;
		@@ -350,26 +369,39 @@ static const char cmd_rewriteoptions(cmd_parms cmd,
		return "RewriteOptions: MaxRedirects has the format MaxRedirects"
		"=n.";
		}
		else if (!strcasecmp(w, "allowanyuri")) {
		options \|= OPTION_ANYURI;
		}
		else if (!strcasecmp(w, "mergebase")) {
		options \|= OPTION_MERGEBASE;
		}
		else {
		return apr_pstrcat(cmd->pool, "RewriteOptions: unknown option '",
		w, "'", NULL);
		}
		}

		/* put it into the appropriate config */
		/* server command? set both global scope and base directory scope */
		if (cmd->path == NULL) { /* is server command */
		rewrite_server_conf *conf =
		rewrite_perdir_conf *dconf = in_dconf;
		rewrite_server_conf *sconf =
		ap_get_module_config(cmd->server->module_config,
		&rewrite_module);

		conf->options \|= options;
		conf->redirect_limit = limit;
		sconf->options \|= options;
		sconf->options_set = 1;
		sconf->redirect_limit = limit;
		dconf->options \|= options;
		dconf->options_set = 1;
		dconf->redirect_limit = limit;
		}
		/* directory command? set directory scope only */
		else { /* is per-directory command */
		rewrite_perdir_conf *conf = in_dconf;
		rewrite_perdir_conf *dconf = in_dconf;

		conf->options \|= options;
		conf->redirect_limit = limit;
		dconf->options \|= options;
		dconf->options_set = 1;
		dconf->redirect_limit = limit;
		}

		return NULL;
		@@ -541,6 +573,7 @@ static const char cmd_rewritebase(cmd_parms cmd, void *in_dconf,
		}

		dconf->baseurl = a1;
		dconf->baseurl_set = 1;

		return NULL;
		}
		@@ -1090,6 +1123,7 @@ static void init_child(apr_pool_t p, server_rec s)

		static int hook_uri2file(request_rec *r)
		{
		rewrite_perdir_conf *dconf;
		rewrite_server_conf *conf;
		const char *saved_rulestatus;
		const char *var;
		@@ -1109,11 +1143,14 @@ static int hook_uri2file(request_rec *r)
		*/
		conf = ap_get_module_config(r->server->module_config, &rewrite_module);

		dconf = (rewrite_perdir_conf *)ap_get_module_config(r->per_dir_config,
		&rewrite_module);

		/*
		* only do something under runtime if the engine is really enabled,
		* else return immediately!
		*/
		if (conf->state == ENGINE_DISABLED) {
		if (!dconf \|\| dconf->state == ENGINE_DISABLED) {
		return DECLINED;
		}

		@@ -1129,6 +1166,19 @@ static int hook_uri2file(request_rec *r)
		return DECLINED;
		}

		/* Unless the anyuri option is set, ensure that the input to the
		* first rule really is a URL-path, avoiding security issues with
		* poorly configured rules. See CVE-2011-3368, CVE-2011-4317. */
		if ((dconf->options & OPTION_ANYURI) == 0
		&& ((r->unparsed_uri[0] == '*' && r->unparsed_uri[1] == '\0')
		\|\| !r->uri \|\| r->uri[0] != '/')) {
		rewritelog(r, 8, "Declining, request-URI '%s' is not a URL-path. "
		"Consult the manual entry for the RewriteOptions directive "
		"for options and caveats about matching other strings.",
		r->uri);
		return DECLINED;
		}

		/*
		* add the SCRIPT_URL variable to the env. this is a bit complicated
		* due to the fact that apache uses subrequests and internal redirects
		@@ -1457,7 +1507,7 @@ static int hook_fixup(request_rec *r)
		* only do something under runtime if the engine is really enabled,
		* for this directory, else return immediately!
		*/
		if (dconf->state == ENGINE_DISABLED) {
		if (!dconf \|\| dconf->state == ENGINE_DISABLED) {
		return DECLINED;
		}

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