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-rw-r--r--modules/mappers/mod_actions.c6
-rw-r--r--modules/mappers/mod_negotiation.c8
-rw-r--r--modules/mappers/mod_rewrite.c203
3 files changed, 170 insertions, 47 deletions
diff --git a/modules/mappers/mod_actions.c b/modules/mappers/mod_actions.c
index ac9c3b7..5e398b5 100644
--- a/modules/mappers/mod_actions.c
+++ b/modules/mappers/mod_actions.c
@@ -182,8 +182,10 @@ static int action_handler(request_rec *r)
return DECLINED;
/* Second, check for actions (which override the method scripts) */
- action = r->handler ? r->handler :
- ap_field_noparam(r->pool, r->content_type);
+ action = r->handler;
+ if (!action && AP_REQUEST_IS_TRUSTED_CT(r)) {
+ action = ap_field_noparam(r->pool, r->content_type);
+ }
if (action && (t = apr_table_get(conf->action_types, action))) {
int virtual = (*t++ == '0' ? 0 : 1);
diff --git a/modules/mappers/mod_negotiation.c b/modules/mappers/mod_negotiation.c
index c056b28..a528f81 100644
--- a/modules/mappers/mod_negotiation.c
+++ b/modules/mappers/mod_negotiation.c
@@ -1167,7 +1167,7 @@ static int read_types_multi(negotiation_state *neg)
* might be doing.
*/
if (sub_req->handler && !sub_req->content_type) {
- ap_set_content_type(sub_req, CGI_MAGIC_TYPE);
+ ap_set_content_type_ex(sub_req, CGI_MAGIC_TYPE, 1);
}
/*
@@ -3003,14 +3003,14 @@ static int handle_map_file(request_rec *r)
/* set MIME type and charset as negotiated */
if (best->mime_type && *best->mime_type) {
if (best->content_charset && *best->content_charset) {
- ap_set_content_type(r, apr_pstrcat(r->pool,
+ ap_set_content_type_ex(r, apr_pstrcat(r->pool,
best->mime_type,
"; charset=",
best->content_charset,
- NULL));
+ NULL), 1);
}
else {
- ap_set_content_type(r, apr_pstrdup(r->pool, best->mime_type));
+ ap_set_content_type_ex(r, apr_pstrdup(r->pool, best->mime_type), 1);
}
}
diff --git a/modules/mappers/mod_rewrite.c b/modules/mappers/mod_rewrite.c
index bbcc11b..3fc2baf 100644
--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -177,6 +177,8 @@ static const char* really_last_key = "rewrite_really_last";
#define RULEFLAG_QSLAST (1<<19)
#define RULEFLAG_QSNONE (1<<20) /* programattic only */
#define RULEFLAG_ESCAPECTLS (1<<21)
+#define RULEFLAG_UNSAFE_PREFIX_STAT (1<<22)
+#define RULEFLAG_UNSAFE_ALLOW3F (1<<23)
/* return code of the rewrite rule
* the result may be escaped - or not
@@ -184,7 +186,7 @@ static const char* really_last_key = "rewrite_really_last";
#define ACTION_NORMAL (1<<0)
#define ACTION_NOESCAPE (1<<1)
#define ACTION_STATUS (1<<2)
-
+#define ACTION_STATUS_SET (1<<3)
#define MAPTYPE_TXT (1<<0)
#define MAPTYPE_DBM (1<<1)
@@ -208,6 +210,7 @@ static const char* really_last_key = "rewrite_really_last";
#define OPTION_IGNORE_INHERIT (1<<8)
#define OPTION_IGNORE_CONTEXT_INFO (1<<9)
#define OPTION_LEGACY_PREFIX_DOCROOT (1<<10)
+#define OPTION_UNSAFE_PREFIX_STAT (1<<12)
#ifndef RAND_MAX
#define RAND_MAX 32767
@@ -301,6 +304,14 @@ typedef enum {
CONDPAT_AP_EXPR
} pattern_type;
+typedef enum {
+ RULE_RC_NOMATCH = 0, /* the rule didn't match */
+ RULE_RC_MATCH = 1, /* a matching rule w/ substitution */
+ RULE_RC_NOSUB = 2, /* a matching rule w/ no substitution */
+ RULE_RC_STATUS_SET = 3 /* a matching rule that has set an HTTP error
+ to be returned in r->status */
+} rule_return_type;
+
typedef struct {
char *input; /* Input string of RewriteCond */
char *pattern; /* the RegExp pattern string */
@@ -642,6 +653,16 @@ static unsigned is_absolute_uri(char *uri, int *supportsqs)
return 0;
}
+static int is_absolute_path(const char *path)
+{
+#ifndef CASE_BLIND_FILESYSTEM
+ return (path[0] == '/');
+#else
+ return ((AP_IS_SLASH(path[0]) && path[1] == path[0])
+ || (apr_isalpha(path[0]) && path[1] == ':' && AP_IS_SLASH(path[2])));
+#endif
+}
+
static const char c2x_table[] = "0123456789abcdef";
static APR_INLINE unsigned char *c2x(unsigned what, unsigned char prefix,
@@ -927,10 +948,15 @@ static void fully_qualify_uri(request_rec *r)
return;
}
+static int startsWith(request_rec *r, const char *haystack, const char *needle) {
+ int rc = (ap_strstr_c(haystack, needle) == haystack);
+ rewritelog((r, 5, NULL, "prefix_stat startsWith(%s, %s) %d", haystack, needle, rc));
+ return rc;
+}
/*
- * stat() only the first segment of a path
+ * stat() only the first segment of a path, and only if it matches the output of the last matching rule
*/
-static int prefix_stat(const char *path, apr_pool_t *pool)
+static int prefix_stat(request_rec *r, const char *path, apr_pool_t *pool, rewriterule_entry *lastsub)
{
const char *curpath = path;
const char *root;
@@ -964,10 +990,36 @@ static int prefix_stat(const char *path, apr_pool_t *pool)
apr_finfo_t sb;
if (apr_stat(&sb, statpath, APR_FINFO_MIN, pool) == APR_SUCCESS) {
- return 1;
+ if (!lastsub) {
+ rewritelog((r, 3, NULL, "prefix_stat no lastsub subst prefix %s", statpath));
+ return 1;
+ }
+
+ rewritelog((r, 3, NULL, "prefix_stat compare statpath %s and lastsub output %s STATOK %d ",
+ statpath, lastsub->output, lastsub->flags & RULEFLAG_UNSAFE_PREFIX_STAT));
+ if (lastsub->flags & RULEFLAG_UNSAFE_PREFIX_STAT) {
+ return 1;
+ }
+ else {
+ const char *docroot = ap_document_root(r);
+ const char *context_docroot = ap_context_document_root(r);
+ /*
+ * As an example, path (r->filename) is /var/foo/bar/baz.html
+ * even if the flag is not set, we can accept a rule that
+ * began with a literal /var (stapath), or if the entire path
+ * starts with the docroot or context document root
+ */
+ if (startsWith(r, lastsub->output, statpath) ||
+ startsWith(r, path, docroot) ||
+ ((docroot != context_docroot) &&
+ startsWith(r, path, context_docroot))) {
+ return 1;
+ }
+ }
}
}
+ /* prefix will be added */
return 0;
}
@@ -3072,6 +3124,9 @@ static const char *cmd_rewriteoptions(cmd_parms *cmd,
else if (!strcasecmp(w, "legacyprefixdocroot")) {
options |= OPTION_LEGACY_PREFIX_DOCROOT;
}
+ else if (!strcasecmp(w, "UnsafePrefixStat")) {
+ options |= OPTION_UNSAFE_PREFIX_STAT;
+ }
else {
return apr_pstrcat(cmd->pool, "RewriteOptions: unknown option '",
w, "'", NULL);
@@ -3780,6 +3835,18 @@ static const char *cmd_rewriterule_setflag(apr_pool_t *p, void *_cfg,
++error;
}
break;
+ case 'u':
+ case 'U':
+ if (!strcasecmp(key, "nsafePrefixStat")){
+ cfg->flags |= (RULEFLAG_UNSAFE_PREFIX_STAT);
+ }
+ else if(!strcasecmp(key, "nsafeAllow3F")) {
+ cfg->flags |= RULEFLAG_UNSAFE_ALLOW3F;
+ }
+ else {
+ ++error;
+ }
+ break;
default:
++error;
break;
@@ -4138,7 +4205,8 @@ static APR_INLINE void force_type_handler(rewriterule_entry *p,
/*
* Apply a single RewriteRule
*/
-static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
+static rule_return_type apply_rewrite_rule(rewriterule_entry *p,
+ rewrite_ctx *ctx)
{
ap_regmatch_t regmatch[AP_MAX_REG_MATCH];
apr_array_header_t *rewriteconds;
@@ -4189,7 +4257,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
rc = !ap_regexec(p->regexp, ctx->uri, AP_MAX_REG_MATCH, regmatch, 0);
if (! (( rc && !(p->flags & RULEFLAG_NOTMATCH)) ||
(!rc && (p->flags & RULEFLAG_NOTMATCH)) ) ) {
- return 0;
+ return RULE_RC_NOMATCH;
}
/* It matched, wow! Now it's time to prepare the context structure for
@@ -4240,7 +4308,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
}
}
else if (!rc) {
- return 0;
+ return RULE_RC_NOMATCH;
}
/* If some HTTP header was involved in the condition, remember it
@@ -4260,6 +4328,15 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
newuri = do_expand(p->output, ctx, p);
rewritelog((r, 2, ctx->perdir, "rewrite '%s' -> '%s'", ctx->uri,
newuri));
+ if (!(p->flags & RULEFLAG_UNSAFE_ALLOW3F) &&
+ ap_strcasestr(r->unparsed_uri, "%3f") &&
+ ap_strchr_c(newuri, '?')) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10508)
+ "Unsafe URL with %%3f URL rewritten without "
+ "UnsafeAllow3F");
+ r->status = HTTP_FORBIDDEN;
+ return RULE_RC_STATUS_SET;
+ }
}
/* expand [E=var:val] and [CO=<cookie>] */
@@ -4277,7 +4354,35 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
r->status = p->forced_responsecode;
}
- return 2;
+ return RULE_RC_NOSUB;
+ }
+
+ /* Add the previously stripped per-directory location prefix, unless
+ * (1) it's an absolute URL path and
+ * (2) it's a full qualified URL
+ */
+ if (!is_proxyreq
+ && !is_absolute_path(newuri)
+ && !AP_IS_SLASH(*newuri)
+ && !is_absolute_uri(newuri, NULL)) {
+ if (ctx->perdir) {
+ rewritelog((r, 3, ctx->perdir, "add per-dir prefix: %s -> %s%s",
+ newuri, ctx->perdir, newuri));
+ newuri = apr_pstrcat(r->pool, ctx->perdir, newuri, NULL);
+ }
+ else if (!(p->flags & (RULEFLAG_PROXY | RULEFLAG_FORCEREDIRECT))) {
+ /* Not an absolute URI-path and the scheme (if any) is unknown,
+ * and it won't be passed to fully_qualify_uri() below either,
+ * so add an implicit '/' prefix. This avoids potentially a common
+ * rule like "RewriteRule ^/some/path(.*) $1" that is given a path
+ * like "/some/pathscheme:..." to produce the fully qualified URL
+ * "scheme:..." which could be misinterpreted later.
+ */
+ rewritelog((r, 3, ctx->perdir, "add root prefix: %s -> /%s",
+ newuri, newuri));
+
+ newuri = apr_pstrcat(r->pool, "/", newuri, NULL);
+ }
}
/* Now adjust API's knowledge about r->filename and r->args */
@@ -4289,18 +4394,6 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
splitout_queryargs(r, p->flags);
- /* Add the previously stripped per-directory location prefix, unless
- * (1) it's an absolute URL path and
- * (2) it's a full qualified URL
- */
- if ( ctx->perdir && !is_proxyreq && *r->filename != '/'
- && !is_absolute_uri(r->filename, NULL)) {
- rewritelog((r, 3, ctx->perdir, "add per-dir prefix: %s -> %s%s",
- r->filename, ctx->perdir, r->filename));
-
- r->filename = apr_pstrcat(r->pool, ctx->perdir, r->filename, NULL);
- }
-
/* If this rule is forced for proxy throughput
* (`RewriteRule ... ... [P]') then emulate mod_proxy's
* URL-to-filename handler to be sure mod_proxy is triggered
@@ -4329,7 +4422,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
r->filename));
r->filename = apr_pstrcat(r->pool, "proxy:", r->filename, NULL);
- return 1;
+ return RULE_RC_MATCH;
}
/* If this rule is explicitly forced for HTTP redirection
@@ -4344,7 +4437,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
r->filename));
r->status = p->forced_responsecode;
- return 1;
+ return RULE_RC_MATCH;
}
/* Special Rewriting Feature: Self-Reduction
@@ -4366,7 +4459,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
"with %s", p->forced_responsecode, r->filename));
r->status = p->forced_responsecode;
- return 1;
+ return RULE_RC_MATCH;
}
/* Finally remember the forced mime-type */
@@ -4375,7 +4468,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
/* Puuhhhhhhhh... WHAT COMPLICATED STUFF ;_)
* But now we're done for this particular rule.
*/
- return 1;
+ return RULE_RC_MATCH;
}
/*
@@ -4383,13 +4476,13 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
* i.e. a list of rewrite rules
*/
static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
- char *perdir)
+ char *perdir, rewriterule_entry **lastsub)
{
rewriterule_entry *entries;
rewriterule_entry *p;
int i;
int changed;
- int rc;
+ rule_return_type rc;
int s;
rewrite_ctx *ctx;
int round = 1;
@@ -4397,6 +4490,7 @@ static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
ctx = apr_palloc(r->pool, sizeof(*ctx));
ctx->perdir = perdir;
ctx->r = r;
+ *lastsub = NULL;
/*
* Iterate over all existing rules
@@ -4424,7 +4518,12 @@ static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
ctx->vary = NULL;
rc = apply_rewrite_rule(p, ctx);
- if (rc) {
+ if (rc != RULE_RC_NOMATCH) {
+
+ if (!(p->flags & RULEFLAG_NOSUB)) {
+ rewritelog((r, 2, perdir, "setting lastsub to rule with output %s", p->output));
+ *lastsub = p;
+ }
/* Catch looping rules with pathinfo growing unbounded */
if ( strlen( r->filename ) > 2*r->server->limit_req_line ) {
@@ -4444,6 +4543,12 @@ static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
apr_table_merge(r->headers_out, "Vary", ctx->vary);
}
+
+ /* Error while evaluating rule, r->status set */
+ if (RULE_RC_STATUS_SET == rc) {
+ return ACTION_STATUS_SET;
+ }
+
/*
* The rule sets the response code (implies match-only)
*/
@@ -4454,7 +4559,7 @@ static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
/*
* Indicate a change if this was not a match-only rule.
*/
- if (rc != 2) {
+ if (rc != RULE_RC_NOSUB) {
changed = ((p->flags & RULEFLAG_NOESCAPE)
? ACTION_NOESCAPE : ACTION_NORMAL);
}
@@ -4643,6 +4748,7 @@ static int hook_uri2file(request_rec *r)
int rulestatus;
void *skipdata;
const char *oargs;
+ rewriterule_entry *lastsub = NULL;
/*
* retrieve the config structures
@@ -4754,7 +4860,7 @@ static int hook_uri2file(request_rec *r)
/*
* now apply the rules ...
*/
- rulestatus = apply_rewrite_list(r, conf->rewriterules, NULL);
+ rulestatus = apply_rewrite_list(r, conf->rewriterules, NULL, &lastsub);
apr_table_setn(r->notes, "mod_rewrite_rewritten",
apr_psprintf(r->pool,"%d",rulestatus));
}
@@ -4792,6 +4898,9 @@ static int hook_uri2file(request_rec *r)
r->status = HTTP_OK;
return n;
}
+ else if (ACTION_STATUS_SET == rulestatus) {
+ return r->status;
+ }
if (to_proxyreq) {
/* it should be go on as an internal proxy request */
@@ -4911,23 +5020,29 @@ static int hook_uri2file(request_rec *r)
return HTTP_BAD_REQUEST;
}
- /* if there is no valid prefix, we call
- * the translator from the core and
- * prefix the filename with document_root
+ /* We have r->filename as a path in a server-context rewrite without
+ * the PT flag. The historical behavior is to treat it as a verbatim
+ * filesystem path iff the first component of the path exists and is
+ * readable by httpd. Otherwise, it is interpreted as DocumentRoot
+ * relative.
*
* NOTICE:
* We cannot leave out the prefix_stat because
- * - when we always prefix with document_root
- * then no absolute path can be created, e.g. via
- * emulating a ScriptAlias directive, etc.
- * - when we always NOT prefix with document_root
+ * - If we always prefix with document_root
+ * then no absolute path can could ever be used in
+ * a substitution. e.g. emulating an Alias.
+ * - If we never prefix with document_root
* then the files under document_root have to
* be references directly and document_root
* gets never used and will be a dummy parameter -
- * this is also bad
+ * this is also bad.
+ * - Later addition: This part is questionable.
+ * If we had never prefixed, users would just
+ * need %{DOCUMENT_ROOT} in substitutions or the
+ * [PT] flag.
*
* BUT:
- * Under real Unix systems this is no problem,
+ * Under real Unix systems this is no perf problem,
* because we only do stat() on the first directory
* and this gets cached by the kernel for along time!
*/
@@ -4936,7 +5051,9 @@ static int hook_uri2file(request_rec *r)
uri_reduced = apr_table_get(r->notes, "mod_rewrite_uri_reduced");
}
- if (!prefix_stat(r->filename, r->pool) || uri_reduced != NULL) {
+ if (!prefix_stat(r, r->filename, r->pool,
+ conf->options & OPTION_UNSAFE_PREFIX_STAT ? NULL : lastsub)
+ || uri_reduced != NULL) {
int res;
char *tmp = r->uri;
@@ -4981,6 +5098,7 @@ static int hook_fixup(request_rec *r)
char *ofilename, *oargs;
int is_proxyreq;
void *skipdata;
+ rewriterule_entry *lastsub;
dconf = (rewrite_perdir_conf *)ap_get_module_config(r->per_dir_config,
&rewrite_module);
@@ -5065,7 +5183,7 @@ static int hook_fixup(request_rec *r)
/*
* now apply the rules ...
*/
- rulestatus = apply_rewrite_list(r, dconf->rewriterules, dconf->directory);
+ rulestatus = apply_rewrite_list(r, dconf->rewriterules, dconf->directory, &lastsub);
if (rulestatus) {
unsigned skip_absolute = is_absolute_uri(r->filename, NULL);
int to_proxyreq = 0;
@@ -5094,6 +5212,9 @@ static int hook_fixup(request_rec *r)
r->status = HTTP_OK;
return n;
}
+ else if (ACTION_STATUS_SET == rulestatus) {
+ return r->status;
+ }
if (to_proxyreq) {
/* it should go on as an internal proxy request */
@@ -5333,7 +5454,7 @@ static int hook_mimetype(request_rec *r)
rewritelog((r, 1, NULL, "force filename %s to have MIME-type '%s'",
r->filename, t));
- ap_set_content_type(r, t);
+ ap_set_content_type_ex(r, t, 1);
}
/* handler */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 15:03:15 +0000