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From a24ac172f52e75101913f3946cfa5515f723c99f Mon Sep 17 00:00:00 2001
From: Arnaud Le Blanc <arnaud.lb@gmail.com>
Date: Mon, 9 Sep 2024 15:22:07 +0200
Subject: [PATCH 04/11] Fix GHSA-9pqp-7h25-4f32
multipart/form-data boundaries larger than the read buffer result in erroneous
parsing, which violates data integrity.
Limit boundary size, as allowed by RFC 1521:
Encapsulation boundaries [...] must be no longer than 70 characters, not
counting the two leading hyphens.
We correctly parse payloads with boundaries of length up to
FILLUNIT-strlen("\r\n--") bytes, so allow this for BC.
(cherry picked from commit 19b49258d0c5a61398d395d8afde1123e8d161e0)
(cherry picked from commit 2b0daf421c162376892832588eccdfa9a286ed09)
---
main/rfc1867.c | 7 ++
tests/basic/GHSA-9pqp-7h25-4f32.inc | 3 +
tests/basic/GHSA-9pqp-7h25-4f32.phpt | 100 +++++++++++++++++++++++++++
3 files changed, 110 insertions(+)
create mode 100644 tests/basic/GHSA-9pqp-7h25-4f32.inc
create mode 100644 tests/basic/GHSA-9pqp-7h25-4f32.phpt
diff --git a/main/rfc1867.c b/main/rfc1867.c
index 1b212c93325..43ccce120c3 100644
--- a/main/rfc1867.c
+++ b/main/rfc1867.c
@@ -759,6 +759,13 @@ SAPI_API SAPI_POST_HANDLER_FUNC(rfc1867_post_handler) /* {{{ */
boundary_len = boundary_end-boundary;
}
+ /* Boundaries larger than FILLUNIT-strlen("\r\n--") characters lead to
+ * erroneous parsing */
+ if (boundary_len > FILLUNIT-strlen("\r\n--")) {
+ sapi_module.sapi_error(E_WARNING, "Boundary too large in multipart/form-data POST data");
+ return;
+ }
+
/* Initialize the buffer */
if (!(mbuff = multipart_buffer_new(boundary, boundary_len))) {
sapi_module.sapi_error(E_WARNING, "Unable to initialize the input buffer");
diff --git a/tests/basic/GHSA-9pqp-7h25-4f32.inc b/tests/basic/GHSA-9pqp-7h25-4f32.inc
new file mode 100644
index 00000000000..adf72a361a2
--- /dev/null
+++ b/tests/basic/GHSA-9pqp-7h25-4f32.inc
@@ -0,0 +1,3 @@
+<?php
+print "Hello world\n";
+var_dump($_POST);
diff --git a/tests/basic/GHSA-9pqp-7h25-4f32.phpt b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
new file mode 100644
index 00000000000..af819163705
--- /dev/null
+++ b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
@@ -0,0 +1,100 @@
+--TEST--
+GHSA-9pqp-7h25-4f32
+--SKIPIF--
+<?php
+if (!getenv('TEST_PHP_CGI_EXECUTABLE')) {
+ die("skip php-cgi not available");
+}
+?>
+--FILE--
+<?php
+
+const FILLUNIT = 5 * 1024;
+
+function test($boundaryLen) {
+ printf("Boundary len: %d\n", $boundaryLen);
+
+ $cmd = [
+ getenv('TEST_PHP_CGI_EXECUTABLE'),
+ '-C',
+ '-n',
+ __DIR__ . '/GHSA-9pqp-7h25-4f32.inc',
+ ];
+
+ $boundary = str_repeat('A', $boundaryLen);
+ $body = ""
+ . "--$boundary\r\n"
+ . "Content-Disposition: form-data; name=\"koko\"\r\n"
+ . "\r\n"
+ . "BBB\r\n--" . substr($boundary, 0, -1) . "CCC\r\n"
+ . "--$boundary--\r\n"
+ ;
+
+ $env = array_merge($_ENV, [
+ 'REDIRECT_STATUS' => '1',
+ 'CONTENT_TYPE' => "multipart/form-data; boundary=$boundary",
+ 'CONTENT_LENGTH' => strlen($body),
+ 'REQUEST_METHOD' => 'POST',
+ 'SCRIPT_FILENAME' => __DIR__ . '/GHSA-9pqp-7h25-4f32.inc',
+ ]);
+
+ $spec = [
+ 0 => ['pipe', 'r'],
+ 1 => STDOUT,
+ 2 => STDOUT,
+ ];
+
+ $pipes = [];
+
+ print "Starting...\n";
+
+ $handle = proc_open($cmd, $spec, $pipes, getcwd(), $env);
+
+ fwrite($pipes[0], $body);
+
+ $status = proc_close($handle);
+
+ print "\n";
+}
+
+for ($offset = -1; $offset <= 1; $offset++) {
+ test(FILLUNIT - strlen("\r\n--") + $offset);
+}
+
+?>
+--EXPECTF--
+Boundary len: 5115
+Starting...
+X-Powered-By: %s
+Content-type: text/html; charset=UTF-8
+
+Hello world
+array(1) {
+ ["koko"]=>
+ string(5124) "BBB
+--AAA%sCCC"
+}
+
+Boundary len: 5116
+Starting...
+X-Powered-By: %s
+Content-type: text/html; charset=UTF-8
+
+Hello world
+array(1) {
+ ["koko"]=>
+ string(5125) "BBB
+--AAA%sCCC"
+}
+
+Boundary len: 5117
+Starting...
+X-Powered-By: %s
+Content-type: text/html; charset=UTF-8
+
+<br />
+<b>Warning</b>: Boundary too large in multipart/form-data POST data in <b>Unknown</b> on line <b>0</b><br />
+Hello world
+array(0) {
+}
+
--
2.46.1
From 2fd1b83817d20523e72bef3ad524cd5797f51acf Mon Sep 17 00:00:00 2001
From: Jakub Zelenka <bukka@php.net>
Date: Mon, 23 Sep 2024 18:54:31 +0100
Subject: [PATCH 08/11] Skip GHSA-9pqp-7h25-4f32 test on Windows
(cherry picked from commit c70e25630832fa10d421328eed2b8e1a36af7a64)
(cherry picked from commit c75683864f6e4188439e8ca2adbb05824918be12)
---
tests/basic/GHSA-9pqp-7h25-4f32.phpt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tests/basic/GHSA-9pqp-7h25-4f32.phpt b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
index af819163705..29bcb6557d5 100644
--- a/tests/basic/GHSA-9pqp-7h25-4f32.phpt
+++ b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
@@ -5,6 +5,9 @@ GHSA-9pqp-7h25-4f32
if (!getenv('TEST_PHP_CGI_EXECUTABLE')) {
die("skip php-cgi not available");
}
+if (substr(PHP_OS, 0, 3) == 'WIN') {
+ die("skip not for Windows in CI - probably resource issue");
+}
?>
--FILE--
<?php
--
2.46.1
From 29065f33f37f99ba33254cb23c941647bcd7372c Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Thu, 26 Sep 2024 15:49:03 +0200
Subject: [PATCH 11/11] adapt GHSA-9pqp-7h25-4f32 test for 7.x
---
tests/basic/GHSA-9pqp-7h25-4f32.phpt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tests/basic/GHSA-9pqp-7h25-4f32.phpt b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
index 29bcb6557d5..a1ead918ff3 100644
--- a/tests/basic/GHSA-9pqp-7h25-4f32.phpt
+++ b/tests/basic/GHSA-9pqp-7h25-4f32.phpt
@@ -21,6 +21,7 @@ function test($boundaryLen) {
getenv('TEST_PHP_CGI_EXECUTABLE'),
'-C',
'-n',
+ '-dlog_errors=1',
__DIR__ . '/GHSA-9pqp-7h25-4f32.inc',
];
@@ -92,11 +93,10 @@ array(1) {
Boundary len: 5117
Starting...
+PHP Warning: Boundary too large in multipart/form-data POST data in Unknown on line 0
X-Powered-By: %s
Content-type: text/html; charset=UTF-8
-<br />
-<b>Warning</b>: Boundary too large in multipart/form-data POST data in <b>Unknown</b> on line <b>0</b><br />
Hello world
array(0) {
}
--
2.46.1
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