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From 669f8524ad99a6b9220ea2cee1a07a9de3964776 Mon Sep 17 00:00:00 2001
From: Jan Ehrhardt <github@ehrhardt.nl>
Date: Wed, 5 Jun 2024 20:28:45 +0200
Subject: [PATCH 1/8] Fix GHSA-3qgc-jrrr-25jv
---
sapi/cgi/cgi_main.c | 23 ++++++++++++++-
sapi/cgi/tests/ghsa-3qgc-jrrr-25jv.phpt | 38 +++++++++++++++++++++++++
2 files changed, 60 insertions(+), 1 deletion(-)
create mode 100644 sapi/cgi/tests/ghsa-3qgc-jrrr-25jv.phpt
diff --git a/sapi/cgi/cgi_main.c b/sapi/cgi/cgi_main.c
index 16bb2126d2..970950a657 100644
--- a/sapi/cgi/cgi_main.c
+++ b/sapi/cgi/cgi_main.c
@@ -1881,8 +1881,13 @@ int main(int argc, char *argv[])
}
}
+ /* Apache CGI will pass the query string to the command line if it doesn't contain a '='.
+ * This can create an issue where a malicious request can pass command line arguments to
+ * the executable. Ideally we skip argument parsing when we're in cgi or fastcgi mode,
+ * but that breaks PHP scripts on Linux with a hashbang: `#!/php-cgi -d option=value`.
+ * Therefore, this code only prevents passing arguments if the query string starts with a '-'.
+ * Similarly, scripts spawned in subprocesses on Windows may have the same issue. */
if((query_string = getenv("QUERY_STRING")) != NULL && strchr(query_string, '=') == NULL) {
- /* we've got query string that has no = - apache CGI will pass it to command line */
unsigned char *p;
decoded_query_string = strdup(query_string);
php_url_decode(decoded_query_string, strlen(decoded_query_string));
@@ -1892,6 +1897,22 @@ int main(int argc, char *argv[])
if(*p == '-') {
skip_getopt = 1;
}
+
+ /* On Windows we have to take into account the "best fit" mapping behaviour. */
+#ifdef PHP_WIN32
+ if (*p >= 0x80) {
+ wchar_t wide_buf[1];
+ wide_buf[0] = *p;
+ char char_buf[4];
+ size_t wide_buf_len = sizeof(wide_buf) / sizeof(wide_buf[0]);
+ size_t char_buf_len = sizeof(char_buf) / sizeof(char_buf[0]);
+ if (WideCharToMultiByte(CP_ACP, 0, wide_buf, wide_buf_len, char_buf, char_buf_len, NULL, NULL) == 0
+ || char_buf[0] == '-') {
+ skip_getopt = 1;
+ }
+ }
+#endif
+
free(decoded_query_string);
}
diff --git a/sapi/cgi/tests/ghsa-3qgc-jrrr-25jv.phpt b/sapi/cgi/tests/ghsa-3qgc-jrrr-25jv.phpt
new file mode 100644
index 0000000000..fd2fcdfbf8
--- /dev/null
+++ b/sapi/cgi/tests/ghsa-3qgc-jrrr-25jv.phpt
@@ -0,0 +1,38 @@
+--TEST--
+GHSA-3qgc-jrrr-25jv
+--SKIPIF--
+<?php
+include 'skipif.inc';
+if (PHP_OS_FAMILY !== "Windows") die("skip Only for Windows");
+
+$codepage = trim(shell_exec("powershell Get-ItemPropertyValue HKLM:\\SYSTEM\\CurrentControlSet\\Control\\Nls\\CodePage ACP"));
+if ($codepage !== '932' && $codepage !== '936' && $codepage !== '950') die("skip Wrong codepage");
+?>
+--FILE--
+<?php
+include 'include.inc';
+
+$filename = __DIR__."/GHSA-3qgc-jrrr-25jv_tmp.php";
+$script = '<?php echo "hello "; echo "world"; ?>';
+file_put_contents($filename, $script);
+
+$php = get_cgi_path();
+reset_env_vars();
+
+putenv("SERVER_NAME=Test");
+putenv("SCRIPT_FILENAME=$filename");
+putenv("QUERY_STRING=%ads");
+putenv("REDIRECT_STATUS=1");
+
+passthru("$php -s");
+
+?>
+--CLEAN--
+<?php
+@unlink(__DIR__."/GHSA-3qgc-jrrr-25jv_tmp.php");
+?>
+--EXPECTF--
+X-Powered-By: PHP/%s
+Content-type: %s
+
+hello world
--
2.46.1
From cc70fdedb5b362b6d666bc6604658aac70c1aec0 Mon Sep 17 00:00:00 2001
From: Jan Ehrhardt <github@ehrhardt.nl>
Date: Sun, 9 Jun 2024 20:12:52 +0200
Subject: [PATCH 2/8] NEWS: Add backport from 8.1.29
---
NEWS | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/NEWS b/NEWS
index 3bb175ea25..c52661abc3 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,10 @@ PHP NEWS
Backported from 8.1.29
+- CGI:
+ . Fixed bug GHSA-3qgc-jrrr-25jv (Bypass of CVE-2012-1823, Argument Injection
+ in PHP-CGI). (CVE-2024-4577) (nielsdos)
+
- Filter:
. Fixed bug GHSA-w8qr-v226-r27w (Filter bypass in filter_var FILTER_VALIDATE_URL).
(CVE-2024-5458) (nielsdos)
--
2.46.1
From 53a0269aa1d952eec1c65e0e0d3e9800e0427ded Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Fri, 14 Jun 2024 19:49:22 +0200
Subject: [PATCH 4/8] Fix GHSA-p99j-rfp4-xqvq
It's no use trying to work around whatever the operating system and Apache
do because we'll be fighting that until eternity.
Change the skip_getopt condition such that when we're running in
CGI or FastCGI mode we always skip the argument parsing.
This is a BC break, but this seems to be the only way to get rid of this
class of issues.
(cherry picked from commit abcfd980bfa03298792fd3aba051c78d52f10642)
(cherry picked from commit 2d2552e092b6ff32cd823692d512f126ee629842)
(cherry picked from commit 1158d06f0b20532ab7309cb20f0be843f9662e3c)
(cherry picked from commit 89c66773413267949de995671bfb4bd03c34fbf9)
---
sapi/cgi/cgi_main.c | 26 ++++++++------------------
1 file changed, 8 insertions(+), 18 deletions(-)
diff --git a/sapi/cgi/cgi_main.c b/sapi/cgi/cgi_main.c
index 970950a657..be273676ce 100644
--- a/sapi/cgi/cgi_main.c
+++ b/sapi/cgi/cgi_main.c
@@ -1830,7 +1830,6 @@ int main(int argc, char *argv[])
int status = 0;
#endif
char *query_string;
- char *decoded_query_string;
int skip_getopt = 0;
#ifdef HAVE_SIGNAL_H
@@ -1886,10 +1885,15 @@ int main(int argc, char *argv[])
* the executable. Ideally we skip argument parsing when we're in cgi or fastcgi mode,
* but that breaks PHP scripts on Linux with a hashbang: `#!/php-cgi -d option=value`.
* Therefore, this code only prevents passing arguments if the query string starts with a '-'.
- * Similarly, scripts spawned in subprocesses on Windows may have the same issue. */
+ * Similarly, scripts spawned in subprocesses on Windows may have the same issue.
+ * However, Windows has lots of conversion rules and command line parsing rules that
+ * are too difficult and dangerous to reliably emulate. */
if((query_string = getenv("QUERY_STRING")) != NULL && strchr(query_string, '=') == NULL) {
+#ifdef PHP_WIN32
+ skip_getopt = cgi || fastcgi;
+#else
unsigned char *p;
- decoded_query_string = strdup(query_string);
+ char *decoded_query_string = strdup(query_string);
php_url_decode(decoded_query_string, strlen(decoded_query_string));
for (p = (unsigned char *)decoded_query_string; *p && *p <= ' '; p++) {
/* skip all leading spaces */
@@ -1898,22 +1902,8 @@ int main(int argc, char *argv[])
skip_getopt = 1;
}
- /* On Windows we have to take into account the "best fit" mapping behaviour. */
-#ifdef PHP_WIN32
- if (*p >= 0x80) {
- wchar_t wide_buf[1];
- wide_buf[0] = *p;
- char char_buf[4];
- size_t wide_buf_len = sizeof(wide_buf) / sizeof(wide_buf[0]);
- size_t char_buf_len = sizeof(char_buf) / sizeof(char_buf[0]);
- if (WideCharToMultiByte(CP_ACP, 0, wide_buf, wide_buf_len, char_buf, char_buf_len, NULL, NULL) == 0
- || char_buf[0] == '-') {
- skip_getopt = 1;
- }
- }
-#endif
-
free(decoded_query_string);
+#endif
}
while (!skip_getopt && (c = php_getopt(argc, argv, OPTIONS, &php_optarg, &php_optind, 0, 2)) != -1) {
--
2.46.1
|
