summaryrefslogtreecommitdiffstats
path: root/php-cve-2024-8926.patch
blob: a7bf1105ab0ae4440d13b8b6032adfeab24e694b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
From 9f95e17cc0a9a79da82157e34e3effe1bc395037 Mon Sep 17 00:00:00 2001
From: Jan Ehrhardt <github@ehrhardt.nl>
Date: Wed, 5 Jun 2024 20:44:46 +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 0d52941c5a1..0d3b54ed8b8 100644
--- a/sapi/cgi/cgi_main.c
+++ b/sapi/cgi/cgi_main.c
@@ -1798,8 +1798,13 @@ 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));
@@ -1809,6 +1814,22 @@ 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 00000000000..fd2fcdfbf89
--- /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 dc40d2d7960dd35f0178ff52c1f8590b7b1a08b2 Mon Sep 17 00:00:00 2001
From: Jan Ehrhardt <github@ehrhardt.nl>
Date: Sun, 9 Jun 2024 20:10:36 +0200
Subject: [PATCH 2/8] NEWS: Add backports from 8.1.29

---
 NEWS | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/NEWS b/NEWS
index 7a9b6bdae18..79133f558af 100644
--- a/NEWS
+++ b/NEWS
@@ -3,10 +3,18 @@ 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)
 
+- Standard:
+  . Fixed bug GHSA-9fcc-425m-g385 (Bypass of CVE-2024-1874).
+    (CVE-2024-5585) (nielsdos)
+
 Backported from 8.1.28
 
 - Standard:
-- 
2.46.1

From 2d2552e092b6ff32cd823692d512f126ee629842 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)
---
 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 0d3b54ed8b8..6e148874e4f 100644
--- a/sapi/cgi/cgi_main.c
+++ b/sapi/cgi/cgi_main.c
@@ -1748,7 +1748,6 @@ int main(int argc, char *argv[])
 	int status = 0;
 #endif
 	char *query_string;
-	char *decoded_query_string;
 	int skip_getopt = 0;
 
 #if defined(SIGPIPE) && defined(SIG_IGN)
@@ -1803,10 +1802,15 @@ 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 */
@@ -1815,22 +1819,8 @@ 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