B (escape backreferences)
The [B] flag instructs RewriteRule to escape non-alphanumeric
characters before applying the transformation.
In 2.4.26 and later, you can limit the escaping to specific characters
-in backreferences by listing them: [B=#?;]. Note: The space
-character can be used in the list of characters to escape, but it cannot be
-the last character in the list.
mod_rewrite has to unescape URLs before mapping them,
so backreferences are unescaped at the time they are applied.
@@ -120,6 +116,20 @@ when the backend may break if presented with an unescaped URL.
An alternative to this flag is using a RewriteCond to capture against %{THE_REQUEST} which will capture
strings in the encoded form.
In 2.4.26 and later, you can limit the escaping to specific characters
+in backreferences by listing them: [B=#?;]. Note: The space
+character can be used in the list of characters to escape, but you must quote
+the entire third argument of RewriteRule
+and the space must not be the last character in the list.
# Escape spaces and question marks. The quotes around the final argument +# are required when a space is included. +RewriteRule "^search/(.*)$" "/search.php?term=$1" "[B= ?]"+ +
To limit the characters escaped this way, see #flag_bne +and #flag_bctls
+
BNP|backrefnoplus (don't escape space to +)
@@ -127,8 +137,40 @@ strings in the encoded form. in a backreference to %20 rather than '+'. Useful when the backreference will be used in the path component rather than the query string. ++# Escape spaces to %20 in the path instead of + as used in form submission via +# the query string +RewriteRule "^search/(.*)$" "/search.php/$1" "[B,BNP]" ++
This flag is available in version 2.4.26 and later.
+BCTLS
+The [BCTLS] flag is similar to the [B] flag, but only escapes +control characters and the space character. This is the same set of +characters rejected when they are copied into the query string unencoded. +
+ ++# Escape control characters and spaces +RewriteRule "^search/(.*)$" "/search.php/$1" "[BCTLS]" ++ +
BNE
+The list of characters in [BNE=...] are treated as exclusions to the +characters of the [B] or [BCTLS] flags. The listed characters will not be +escaped. +
+ ++# Escape the default characters, but leave / +RewriteRule "^search/(.*)$" "/search.php?term=$1" "[B,BNE=/]" ++
C|chain
@@ -204,7 +246,7 @@ browsers that support this feature.Consider this example:
RewriteEngine On -RewriteRule "^/index\.html" "-" [CO=frontdoor:yes:.example.com:1440:/]+RewriteRule "^/index\.html" "-" [CO=frontdoor:yes:.example.com:1440:/]
In the example give, the rule doesn't rewrite the request.
@@ -410,8 +452,8 @@ argument to index.php, however, the index.php, the RewriteRule will be skipped.
RewriteBase "/"
-RewriteCond "%{REQUEST_URI}" "!=/index.php"
-RewriteRule "^(.*)" "/index.php?req=$1" [L,PT]
+RewriteCond "%{REQUEST_URI}" !=/index.php
+RewriteRule "^(.*)" "/index.php?req=$1" [L,PT]
A), perform this substitution (i.e., replace the
A with a B).
-In 2.4.8 and later, this module returns an error after 32,000 iterations to +
In 2.4.8 and later, this module returns an error after 10,000 iterations to protect against unintended looping. An alternative maximum number of iterations can be specified by adding to the N flag.
# Be willing to replace 1 character in each pass of the loop -RewriteRule "(.+)[><;]$" "$1" [N=64000] +RewriteRule "(.+)[><;]$" "$1" [N=32000] # ... or, give up if after 10 loops RewriteRule "(.+)[><;]$" "$1" [N=10]@@ -681,19 +723,21 @@ URI in request' warnings.
The [S] flag is used to skip rules that you don't want to run. The
syntax of the skip flag is [S=N], where N signifies
the number of rules to skip (provided the
-RewriteRule matches). This can be thought of as a goto
-statement in your rewrite ruleset. In the following example, we only want
-to run the RewriteRule if the
-requested URI doesn't correspond with an actual file.
+RewriteCond directives match). This can be thought of as a
+goto statement in your rewrite ruleset. In the following
+example, we only want to run the
+RewriteRule if the requested URI doesn't correspond with an
+actual file.
# Is the request for a non-existent file?
-RewriteCond "%{REQUEST_FILENAME}" "!-f"
-RewriteCond "%{REQUEST_FILENAME}" "!-d"
+RewriteCond "%{REQUEST_FILENAME}" !-f
+RewriteCond "%{REQUEST_FILENAME}" !-d
# If so, skip these two RewriteRules
-RewriteRule ".?" "-" [S=2]
+RewriteRule ".?" "-" [S=2]
-RewriteRule "(.*\.gif)" "images.php?$1"
-RewriteRule "(.*\.html)" "docs.php?$1"
+RewriteRule "(.*\.gif)" "images.php?$1"
+RewriteRule "(.*\.html)" "docs.php?$1"
This technique is useful because a RewriteCond only applies to the
@@ -705,18 +749,18 @@ use this to make pseudo if-then-else constructs: The last rule of
the then-clause becomes skip=N, where N is the
number of rules in the else-clause:
# Does the file exist?
-RewriteCond "%{REQUEST_FILENAME}" "!-f"
-RewriteCond "%{REQUEST_FILENAME}" "!-d"
+RewriteCond "%{REQUEST_FILENAME}" !-f
+RewriteCond "%{REQUEST_FILENAME}" !-d
# Create an if-then-else construct by skipping 3 lines if we meant to go to the "else" stanza.
-RewriteRule ".?" "-" [S=3]
+RewriteRule ".?" "-" [S=3]
# IF the file exists, then:
- RewriteRule "(.*\.gif)" "images.php?$1"
+ RewriteRule "(.*\.gif)" "images.php?$1"
RewriteRule "(.*\.html)" "docs.php?$1"
# Skip past the "else" stanza.
- RewriteRule ".?" "-" [S=1]
+ RewriteRule ".?" "-" [S=1]
# ELSE...
- RewriteRule "(.*)" "404.php?file=$1"
+ RewriteRule "(.*)" "404.php?file=$1"
# END
@@ -733,7 +777,7 @@ sent. This has the same effect as the # Serve .pl files as plain text
-RewriteRule "\.pl$" "-" [T=text/plain]
+RewriteRule "\.pl$" "-" [T=text/plain]
Or, perhaps, if you have a camera that produces jpeg images without
@@ -741,7 +785,7 @@ file extensions, you could force those images to be served with the
correct MIME type by virtue of their file names:
# Files with 'IMG' in the name are jpg images.
-RewriteRule "IMG" "-" [T=image/jpg]
+RewriteRule "IMG" "-" [T=image/jpg]
Please note that this is a trivial example, and could be better done
diff --git a/modules/mappers/mod_rewrite.c b/modules/mappers/mod_rewrite.c
index 38dbb24..b71c67c 100644
--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -101,6 +101,8 @@
#include "mod_rewrite.h"
#include "ap_expr.h"
+#include "test_char.h"
+
static ap_dbd_t *(*dbd_acquire)(request_rec*) = NULL;
static void (*dbd_prepare)(server_rec*, const char*, const char*) = NULL;
static const char* really_last_key = "rewrite_really_last";
@@ -168,6 +170,8 @@ static const char* really_last_key = "rewrite_really_last";
#define RULEFLAG_END (1<<17)
#define RULEFLAG_ESCAPENOPLUS (1<<18)
#define RULEFLAG_QSLAST (1<<19)
+#define RULEFLAG_QSNONE (1<<20) /* programattic only */
+#define RULEFLAG_ESCAPECTLS (1<<21)
/* return code of the rewrite rule
* the result may be escaped - or not
@@ -321,7 +325,8 @@ typedef struct {
data_item *cookie; /* added cookies */
int skip; /* number of next rules to skip */
int maxrounds; /* limit on number of loops with N flag */
- char *escapes; /* specific backref escapes */
+ const char *escapes; /* specific backref escapes */
+ const char *noescapes; /* specific backref chars not to escape */
} rewriterule_entry;
typedef struct {
@@ -422,7 +427,9 @@ static const char *rewritemap_mutex_type = "rewrite-map";
/* Optional functions imported from mod_ssl when loaded: */
static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *rewrite_ssl_lookup = NULL;
static APR_OPTIONAL_FN_TYPE(ssl_is_https) *rewrite_is_https = NULL;
-static char *escape_backref(apr_pool_t *p, const char *path, const char *escapeme, int noplus);
+static char *escape_backref(apr_pool_t *p, const char *path,
+ const char *escapeme, const char *noescapeme,
+ int flags);
/*
* +-------------------------------------------------------+
@@ -645,18 +652,26 @@ static APR_INLINE unsigned char *c2x(unsigned what, unsigned char prefix,
return where;
}
+
/*
* Escapes a backreference in a similar way as php's urlencode does.
* Based on ap_os_escape_path in server/util.c
*/
-static char *escape_backref(apr_pool_t *p, const char *path, const char *escapeme, int noplus) {
- char *copy = apr_palloc(p, 3 * strlen(path) + 3);
+static char *escape_backref(apr_pool_t *p, const char *path,
+ const char *escapeme, const char *noescapeme,
+ int flags)
+{
+ char *copy = apr_palloc(p, 3 * strlen(path) + 1);
const unsigned char *s = (const unsigned char *)path;
unsigned char *d = (unsigned char *)copy;
- unsigned c;
+ int noplus = (flags & RULEFLAG_ESCAPENOPLUS) != 0;
+ int ctls = (flags & RULEFLAG_ESCAPECTLS) != 0;
+ unsigned char c;
while ((c = *s)) {
- if (!escapeme) {
+ if (((ctls ? !TEST_CHAR(c, T_VCHAR_OBSTEXT) : !escapeme)
+ || (escapeme && ap_strchr_c(escapeme, c)))
+ && (!noescapeme || !ap_strchr_c(noescapeme, c))) {
if (apr_isalnum(c) || c == '_') {
*d++ = c;
}
@@ -667,23 +682,8 @@ static char *escape_backref(apr_pool_t *p, const char *path, const char *escapem
d = c2x(c, '%', d);
}
}
- else {
- const char *esc = escapeme;
- while (*esc) {
- if (c == *esc) {
- if (c == ' ' && !noplus) {
- *d++ = '+';
- }
- else {
- d = c2x(c, '%', d);
- }
- break;
- }
- ++esc;
- }
- if (!*esc) {
- *d++ = c;
- }
+ else {
+ *d++ = c;
}
++s;
}
@@ -761,15 +761,24 @@ static char *escape_absolute_uri(apr_pool_t *p, char *uri, unsigned scheme)
ap_escape_uri(p, cp), NULL);
}
+
/*
* split out a QUERY_STRING part from
* the current URI string
*/
-static void splitout_queryargs(request_rec *r, int qsappend, int qsdiscard,
- int qslast)
+static void splitout_queryargs(request_rec *r, int flags)
{
char *q;
int split;
+ int qsappend = flags & RULEFLAG_QSAPPEND;
+ int qsdiscard = flags & RULEFLAG_QSDISCARD;
+ int qslast = flags & RULEFLAG_QSLAST;
+
+ if (flags & RULEFLAG_QSNONE) {
+ rewritelog((r, 2, NULL, "discarding query string, no parse from substitution"));
+ r->args = NULL;
+ return;
+ }
/* don't touch, unless it's a scheme for which a query string makes sense.
* See RFC 1738 and RFC 2368.
@@ -794,7 +803,7 @@ static void splitout_queryargs(request_rec *r, int qsappend, int qsdiscard,
olduri = apr_pstrdup(r->pool, r->filename);
*q++ = '\0';
if (qsappend) {
- if (*q) {
+ if (*q) {
r->args = apr_pstrcat(r->pool, q, "&" , r->args, NULL);
}
}
@@ -802,9 +811,9 @@ static void splitout_queryargs(request_rec *r, int qsappend, int qsdiscard,
r->args = apr_pstrdup(r->pool, q);
}
- if (r->args) {
+ if (r->args) {
len = strlen(r->args);
-
+
if (!len) {
r->args = NULL;
}
@@ -2436,7 +2445,8 @@ static char *do_expand(char *input, rewrite_ctx *ctx, rewriterule_entry *entry)
/* escape the backreference */
char *tmp2, *tmp;
tmp = apr_pstrmemdup(pool, bri->source + bri->regmatch[n].rm_so, span);
- tmp2 = escape_backref(pool, tmp, entry->escapes, entry->flags & RULEFLAG_ESCAPENOPLUS);
+ tmp2 = escape_backref(pool, tmp, entry->escapes, entry->noescapes,
+ entry->flags);
rewritelog((ctx->r, 5, ctx->perdir, "escaping backreference '%s' to '%s'",
tmp, tmp2));
@@ -2733,7 +2743,7 @@ static apr_status_t rewritelock_remove(void *data)
* XXX: what an inclined parser. Seems we have to leave it so
* for backwards compat. *sigh*
*/
-static int parseargline(char *str, char **a1, char **a2, char **a3)
+static int parseargline(char *str, char **a1, char **a2, char **a2_end, char **a3)
{
char quote;
@@ -2784,8 +2794,10 @@ static int parseargline(char *str, char **a1, char **a2, char **a3)
if (!*str) {
*a3 = NULL; /* 3rd argument is optional */
+ *a2_end = str;
return 0;
}
+ *a2_end = str;
*str++ = '\0';
while (apr_isspace(*str)) {
@@ -3323,7 +3335,7 @@ static const char *cmd_rewritecond(cmd_parms *cmd, void *in_dconf,
rewrite_server_conf *sconf;
rewritecond_entry *newcond;
ap_regex_t *regexp;
- char *a1 = NULL, *a2 = NULL, *a3 = NULL;
+ char *a1 = NULL, *a2 = NULL, *a2_end, *a3 = NULL;
const char *err;
sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
@@ -3341,7 +3353,7 @@ static const char *cmd_rewritecond(cmd_parms *cmd, void *in_dconf,
* of the argument line. So we can use a1 .. a3 without
* copying them again.
*/
- if (parseargline(str, &a1, &a2, &a3)) {
+ if (parseargline(str, &a1, &a2, &a2_end, &a3)) {
return apr_pstrcat(cmd->pool, "RewriteCond: bad argument line '", str,
"'", NULL);
}
@@ -3500,13 +3512,24 @@ static const char *cmd_rewriterule_setflag(apr_pool_t *p, void *_cfg,
case 'B':
if (!*key || !strcasecmp(key, "ackrefescaping")) {
cfg->flags |= RULEFLAG_ESCAPEBACKREF;
- if (val && *val) {
+ if (val && *val) {
cfg->escapes = val;
}
}
+ else if (!strcasecmp(key, "NE")) {
+ if (val && *val) {
+ cfg->noescapes = val;
+ }
+ else {
+ return "flag 'BNE' wants a list of characters (i.e. [BNE=...])";
+ }
+ }
else if (!strcasecmp(key, "NP") || !strcasecmp(key, "ackrefernoplus")) {
cfg->flags |= RULEFLAG_ESCAPENOPLUS;
}
+ else if (!strcasecmp(key, "CTLS")) {
+ cfg->flags |= RULEFLAG_ESCAPECTLS|RULEFLAG_ESCAPEBACKREF;
+ }
else {
++error;
}
@@ -3749,7 +3772,7 @@ static const char *cmd_rewriterule(cmd_parms *cmd, void *in_dconf,
rewrite_server_conf *sconf;
rewriterule_entry *newrule;
ap_regex_t *regexp;
- char *a1 = NULL, *a2 = NULL, *a3 = NULL;
+ char *a1 = NULL, *a2 = NULL, *a2_end, *a3 = NULL;
const char *err;
sconf = ap_get_module_config(cmd->server->module_config, &rewrite_module);
@@ -3763,12 +3786,11 @@ static const char *cmd_rewriterule(cmd_parms *cmd, void *in_dconf,
}
/* parse the argument line ourself */
- if (parseargline(str, &a1, &a2, &a3)) {
+ if (parseargline(str, &a1, &a2, &a2_end, &a3)) {
return apr_pstrcat(cmd->pool, "RewriteRule: bad argument line '", str,
"'", NULL);
}
- /* arg3: optional flags field */
newrule->forced_mimetype = NULL;
newrule->forced_handler = NULL;
newrule->forced_responsecode = HTTP_MOVED_TEMPORARILY;
@@ -3777,6 +3799,9 @@ static const char *cmd_rewriterule(cmd_parms *cmd, void *in_dconf,
newrule->cookie = NULL;
newrule->skip = 0;
newrule->maxrounds = REWRITE_MAX_ROUNDS;
+ newrule->escapes = newrule->noescapes = NULL;
+
+ /* arg3: optional flags field */
if (a3 != NULL) {
if ((err = cmd_parseflagfield(cmd->pool, newrule, a3,
cmd_rewriterule_setflag)) != NULL) {
@@ -3810,6 +3835,17 @@ static const char *cmd_rewriterule(cmd_parms *cmd, void *in_dconf,
newrule->flags |= RULEFLAG_NOSUB;
}
+ if (*(a2_end-1) == '?') {
+ /* a literal ? at the end of the unsubstituted rewrite rule */
+ newrule->flags |= RULEFLAG_QSNONE;
+ *(a2_end-1) = '\0'; /* trailing ? has done its job */
+ }
+ else if (newrule->flags & RULEFLAG_QSDISCARD) {
+ if (NULL == ap_strchr(newrule->output, '?')) {
+ newrule->flags |= RULEFLAG_QSNONE;
+ }
+ }
+
/* now, if the server or per-dir config holds an
* array of RewriteCond entries, we take it for us
* and clear the array
@@ -4215,9 +4251,7 @@ static int apply_rewrite_rule(rewriterule_entry *p, rewrite_ctx *ctx)
r->path_info = NULL;
}
- splitout_queryargs(r, p->flags & RULEFLAG_QSAPPEND,
- p->flags & RULEFLAG_QSDISCARD,
- p->flags & RULEFLAG_QSLAST);
+ splitout_queryargs(r, p->flags);
/* Add the previously stripped per-directory location prefix, unless
* (1) it's an absolute URL path and
@@ -4696,8 +4730,25 @@ static int hook_uri2file(request_rec *r)
}
if (rulestatus) {
- unsigned skip;
- apr_size_t flen;
+ unsigned skip_absolute = is_absolute_uri(r->filename, NULL);
+ apr_size_t flen = r->filename ? strlen(r->filename) : 0;
+ int to_proxyreq = (flen > 6 && strncmp(r->filename, "proxy:", 6) == 0);
+ int will_escape = skip_absolute && (rulestatus != ACTION_NOESCAPE);
+
+ if (r->args
+ && !will_escape
+ && *(ap_scan_vchar_obstext(r->args))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ * Correct encoding was missed and we're not going to escape
+ * it before returning.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10410)
+ "Rewritten query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
if (ACTION_STATUS == rulestatus) {
int n = r->status;
@@ -4706,8 +4757,7 @@ static int hook_uri2file(request_rec *r)
return n;
}
- flen = r->filename ? strlen(r->filename) : 0;
- if (flen > 6 && strncmp(r->filename, "proxy:", 6) == 0) {
+ if (to_proxyreq) {
/* it should be go on as an internal proxy request */
/* check if the proxy module is enabled, so
@@ -4749,7 +4799,7 @@ static int hook_uri2file(request_rec *r)
r->filename));
return OK;
}
- else if ((skip = is_absolute_uri(r->filename, NULL)) > 0) {
+ else if (skip_absolute > 0) {
int n;
/* it was finally rewritten to a remote URL */
@@ -4757,7 +4807,7 @@ static int hook_uri2file(request_rec *r)
if (rulestatus != ACTION_NOESCAPE) {
rewritelog((r, 1, NULL, "escaping %s for redirect",
r->filename));
- r->filename = escape_absolute_uri(r->pool, r->filename, skip);
+ r->filename = escape_absolute_uri(r->pool, r->filename, skip_absolute);
}
/* append the QUERY_STRING part */
@@ -4981,7 +5031,26 @@ static int hook_fixup(request_rec *r)
*/
rulestatus = apply_rewrite_list(r, dconf->rewriterules, dconf->directory);
if (rulestatus) {
- unsigned skip;
+ unsigned skip_absolute = is_absolute_uri(r->filename, NULL);
+ int to_proxyreq = 0;
+ int will_escape = 0;
+
+ l = strlen(r->filename);
+ to_proxyreq = l > 6 && strncmp(r->filename, "proxy:", 6) == 0;
+ will_escape = skip_absolute && (rulestatus != ACTION_NOESCAPE);
+
+ if (r->args
+ && !will_escape
+ && *(ap_scan_vchar_obstext(r->args))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10411)
+ "Rewritten query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
if (ACTION_STATUS == rulestatus) {
int n = r->status;
@@ -4990,8 +5059,7 @@ static int hook_fixup(request_rec *r)
return n;
}
- l = strlen(r->filename);
- if (l > 6 && strncmp(r->filename, "proxy:", 6) == 0) {
+ if (to_proxyreq) {
/* it should go on as an internal proxy request */
/* make sure the QUERY_STRING and
@@ -5015,7 +5083,7 @@ static int hook_fixup(request_rec *r)
"%s [OK]", r->filename));
return OK;
}
- else if ((skip = is_absolute_uri(r->filename, NULL)) > 0) {
+ else if (skip_absolute > 0) {
/* it was finally rewritten to a remote URL */
/* because we are in a per-dir context
@@ -5024,7 +5092,7 @@ static int hook_fixup(request_rec *r)
*/
if (dconf->baseurl != NULL) {
/* skip 'scheme://' */
- cp = r->filename + skip;
+ cp = r->filename + skip_absolute;
if ((cp = ap_strchr(cp, '/')) != NULL && *(++cp)) {
rewritelog((r, 2, dconf->directory,
@@ -5069,7 +5137,7 @@ static int hook_fixup(request_rec *r)
if (rulestatus != ACTION_NOESCAPE) {
rewritelog((r, 1, dconf->directory, "escaping %s for redirect",
r->filename));
- r->filename = escape_absolute_uri(r->pool, r->filename, skip);
+ r->filename = escape_absolute_uri(r->pool, r->filename, skip_absolute);
}
/* append the QUERY_STRING part */
diff --git a/modules/proxy/mod_proxy_ajp.c b/modules/proxy/mod_proxy_ajp.c
index 6faabea..59396a8 100644
--- a/modules/proxy/mod_proxy_ajp.c
+++ b/modules/proxy/mod_proxy_ajp.c
@@ -69,6 +69,16 @@ static int proxy_ajp_canon(request_rec *r, char *url)
path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0,
r->proxyreq);
search = r->args;
+ if (search && *(ap_scan_vchar_obstext(search))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10406)
+ "To be forwarded query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
}
if (path == NULL)
return HTTP_BAD_REQUEST;
diff --git a/modules/proxy/mod_proxy_balancer.c b/modules/proxy/mod_proxy_balancer.c
index 3a28038..c599e1a 100644
--- a/modules/proxy/mod_proxy_balancer.c
+++ b/modules/proxy/mod_proxy_balancer.c
@@ -106,6 +106,16 @@ static int proxy_balancer_canon(request_rec *r, char *url)
path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0,
r->proxyreq);
search = r->args;
+ if (search && *(ap_scan_vchar_obstext(search))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10407)
+ "To be forwarded query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
}
if (path == NULL)
return HTTP_BAD_REQUEST;
diff --git a/modules/proxy/mod_proxy_http.c b/modules/proxy/mod_proxy_http.c
index 7da9bde..2cdc61e 100644
--- a/modules/proxy/mod_proxy_http.c
+++ b/modules/proxy/mod_proxy_http.c
@@ -90,6 +90,16 @@ static int proxy_http_canon(request_rec *r, char *url)
path = ap_proxy_canonenc(r->pool, url, strlen(url),
enc_path, 0, r->proxyreq);
search = r->args;
+ if (search && *(ap_scan_vchar_obstext(search))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10408)
+ "To be forwarded query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
}
break;
case PROXYREQ_PROXY:
diff --git a/modules/proxy/mod_proxy_wstunnel.c b/modules/proxy/mod_proxy_wstunnel.c
index e005a94..f5e27d9 100644
--- a/modules/proxy/mod_proxy_wstunnel.c
+++ b/modules/proxy/mod_proxy_wstunnel.c
@@ -77,6 +77,16 @@ static int proxy_wstunnel_canon(request_rec *r, char *url)
path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0,
r->proxyreq);
search = r->args;
+ if (search && *(ap_scan_vchar_obstext(search))) {
+ /*
+ * We have a raw control character or a ' ' in r->args.
+ * Correct encoding was missed.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10409)
+ "To be forwarded query string contains control "
+ "characters or spaces");
+ return HTTP_FORBIDDEN;
+ }
}
if (path == NULL)
return HTTP_BAD_REQUEST;
diff --git a/server/gen_test_char.c b/server/gen_test_char.c
index 48ae6f4..6a153a3 100644
--- a/server/gen_test_char.c
+++ b/server/gen_test_char.c
@@ -169,5 +169,15 @@ int main(int argc, char *argv[])
printf("\n};\n");
+
+ printf(
+ "/* we assume the folks using this ensure 0 <= c < 256... which means\n"
+ " * you need a cast to (unsigned char) first, you can't just plug a\n"
+ " * char in here and get it to work, because if char is signed then it\n"
+ " * will first be sign extended.\n"
+ " */\n"
+ "#define TEST_CHAR(c, f) (test_char_table[(unsigned char)(c)] & (f))\n"
+ );
+
return 0;
}
diff --git a/server/util.c b/server/util.c
index 2a5dd04..1d82fd8 100644
--- a/server/util.c
+++ b/server/util.c
@@ -74,13 +74,6 @@
*/
#include "test_char.h"
-/* we assume the folks using this ensure 0 <= c < 256... which means
- * you need a cast to (unsigned char) first, you can't just plug a
- * char in here and get it to work, because if char is signed then it
- * will first be sign extended.
- */
-#define TEST_CHAR(c, f) (test_char_table[(unsigned char)(c)] & (f))
-
/* Win32/NetWare/OS2 need to check for both forward and back slashes
* in ap_getparents() and ap_escape_url.
*/