Fix #77231 Segfault when using convert.quoted-printable-encode filter

Fix #77020 null pointer dereference in imap_mail CVE-2018-19935
Fix #77153 imap_open allows to run arbitrary shell commands via mailbox parameter CVE-2018-19158

4 files changed, 238 insertions, 2 deletions

diff --git a/bug77020.patch b/bug77020.patch
new file mode 100644
index 0000000..c4a080c
--- /dev/null
+++ b/bug77020.patch
@@ -0,0 +1,51 @@
+Backported for 5.4/5.5, from 5.6, by Remi
+
+
+From 7edc639b9ff1c3576773d79d016abbeed1f93846 Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Sun, 11 Nov 2018 10:04:01 -0800
+Subject: [PATCH] Fix #77020: null pointer dereference in imap_mail
+
+If an empty $message is passed to imap_mail(), we must not set message
+to NULL, since _php_imap_mail() is not supposed to handle NULL pointers
+(opposed to pointers to NUL).
+---
+ NEWS                         |  1 +
+ ext/imap/php_imap.c          |  1 -
+ ext/imap/tests/bug77020.phpt | 15 +++++++++++++++
+ 3 files changed, 16 insertions(+), 1 deletion(-)
+ create mode 100644 ext/imap/tests/bug77020.phpt
+
+diff --git a/ext/imap/php_imap.c b/ext/imap/php_imap.c
+index a23e84c08521..b30440f000f3 100644
+--- a/ext/imap/php_imap.c
++++ b/ext/imap/php_imap.c
+@@ -4088,7 +4088,6 @@ PHP_FUNCTION(imap_mail)
+ 	if (!message_len) {
+ 		/* this is not really an error, so it is allowed. */
+ 		php_error_docref(NULL TSRMLS_CC, E_WARNING, "No message string in mail command");
+-		message = NULL;
+ 	}
+ 
+ 	if (_php_imap_mail(to, subject, message, headers, cc, bcc, rpath TSRMLS_CC)) {
+diff --git a/ext/imap/tests/bug77020.phpt b/ext/imap/tests/bug77020.phpt
+new file mode 100644
+index 000000000000..8a65232eec6d
+--- /dev/null
++++ b/ext/imap/tests/bug77020.phpt
+@@ -0,0 +1,15 @@
++--TEST--
++Bug #77020 (null pointer dereference in imap_mail)
++--SKIPIF--
++<?php
++if (!extension_loaded('imap')) die('skip imap extension not available');
++?>
++--FILE--
++<?php
++imap_mail('1', 1, NULL);
++?>
++===DONE===
++--EXPECTF--
++Warning: imap_mail(): No message string in mail command in %s on line %d
++%s
++===DONE===
diff --git a/bug77153.patch b/bug77153.patch
new file mode 100644
index 0000000..7caf8f9
--- /dev/null
+++ b/bug77153.patch
@@ -0,0 +1,124 @@
+Backported for 5.4/5.5, from 5.6, by Remi
+
+
+From e5bfea64c81ae34816479bb05d17cdffe45adddb Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Sun, 18 Nov 2018 17:10:43 -0800
+Subject: [PATCH] Disable rsh/ssh functionality in imap by default (bug #77153)
+
+---
+ NEWS                         |  4 ++++
+ UPGRADING                    |  7 +++++++
+ ext/imap/php_imap.c          | 17 +++++++++++++++++
+ ext/imap/php_imap.h          |  1 +
+ ext/imap/tests/bug77153.phpt | 24 ++++++++++++++++++++++++
+ 5 files changed, 53 insertions(+)
+ create mode 100644 ext/imap/tests/bug77153.phpt
+
+diff --git a/ext/imap/php_imap.c b/ext/imap/php_imap.c
+index 00eae89a963b..f6feebe9f769 100644
+--- a/ext/imap/php_imap.c
++++ b/ext/imap/php_imap.c
+@@ -562,6 +562,15 @@ static const zend_module_dep imap_deps[] = {
+ };
+ /* }}} */
+ 
++
++/* {{{ PHP_INI
++ */
++PHP_INI_BEGIN()
++STD_PHP_INI_BOOLEAN("imap.enable_insecure_rsh", "0", PHP_INI_SYSTEM, OnUpdateBool, enable_rsh, zend_imap_globals, imap_globals)
++PHP_INI_END()
++/* }}} */
++
++
+ /* {{{ imap_module_entry
+  */
+ zend_module_entry imap_module_entry = {
+@@ -835,6 +844,8 @@ PHP_MINIT_FUNCTION(imap)
+ {
+ 	unsigned long sa_all =	SA_MESSAGES | SA_RECENT | SA_UNSEEN | SA_UIDNEXT | SA_UIDVALIDITY;
+ 
++	REGISTER_INI_ENTRIES();
++
+ #ifndef PHP_WIN32
+ 	mail_link(&unixdriver);		/* link in the unix driver */
+ 	mail_link(&mhdriver);		/* link in the mh driver */
+@@ -1052,6 +1063,12 @@ PHP_MINIT_FUNCTION(imap)
+ 	GC_TEXTS               texts
+ 	*/
+ 
++	if (!IMAPG(enable_rsh)) {
++		/* disable SSH and RSH, see https://bugs.php.net/bug.php?id=77153 */
++		mail_parameters (NIL, SET_RSHTIMEOUT, 0);
++		mail_parameters (NIL, SET_SSHTIMEOUT, 0);
++	}
++
+ 	le_imap = zend_register_list_destructors_ex(mail_close_it, NULL, "imap", module_number);
+ 	return SUCCESS;
+ }
+diff --git a/ext/imap/php_imap.h b/ext/imap/php_imap.h
+index 3a1d048cd3e2..0c3ce78d4855 100644
+--- a/ext/imap/php_imap.h
++++ b/ext/imap/php_imap.h
+@@ -214,6 +214,7 @@ ZEND_BEGIN_MODULE_GLOBALS(imap)
+ #endif
+ 	/* php_stream for php_mail_gets() */
+ 	php_stream *gets_stream;
++	zend_bool enable_rsh;
+ ZEND_END_MODULE_GLOBALS(imap)
+ 
+ #ifdef ZTS
+diff --git a/ext/imap/tests/bug77153.phpt b/ext/imap/tests/bug77153.phpt
+new file mode 100644
+index 000000000000..63590aee1dde
+--- /dev/null
++++ b/ext/imap/tests/bug77153.phpt
+@@ -0,0 +1,24 @@
++--TEST--                                 
++Bug #77153 (imap_open allows to run arbitrary shell commands via mailbox parameter)
++--SKIPIF--
++<?php
++        if (!extension_loaded("imap")) { 
++                die("skip imap extension not available");  
++        }
++?>
++--FILE--
++<?php
++$payload = "echo 'BUG'> " . __DIR__ . '/__bug';
++$payloadb64 = base64_encode($payload);
++$server = "x -oProxyCommand=echo\t$payloadb64|base64\t-d|sh}";
++@imap_open('{'.$server.':143/imap}INBOX', '', '');
++// clean
++imap_errors();
++var_dump(file_exists(__DIR__ . '/__bug'));
++?>
++--EXPECT--
++bool(false)
++--CLEAN--
++<?php
++if(file_exists(__DIR__ . '/__bug')) unlink(__DIR__ . '/__bug');
++?>
+\ No newline at end of file
+From d8765852e0400ee2ce8ae9e2177c42731d4539d8 Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Wed, 28 Nov 2018 15:45:51 -0800
+Subject: [PATCH] Add DISPLAY_INI_ENTRIES for imap
+
+---
+ ext/imap/php_imap.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/ext/imap/php_imap.c b/ext/imap/php_imap.c
+index f6feebe9f769..a23e84c08521 100644
+--- a/ext/imap/php_imap.c
++++ b/ext/imap/php_imap.c
+@@ -1155,6 +1155,8 @@ PHP_MINFO_FUNCTION(imap)
+ 	php_info_print_table_row(2, "Kerberos Support", "enabled");
+ #endif
+ 	php_info_print_table_end();
++
++	DISPLAY_INI_ENTRIES();
+ }
+ /* }}} */
+ 
diff --git a/bug77231.patch b/bug77231.patch
new file mode 100644
index 0000000..e805ade
--- /dev/null
+++ b/bug77231.patch
@@ -0,0 +1,46 @@
+Backported for 5.4/5.5, from 5.6, by Remi
+
+
+From 78bffa72c1ad8936eae51270f93be17a9c58cfc1 Mon Sep 17 00:00:00 2001
+From: Stanislav Malyshev <stas@php.net>
+Date: Mon, 3 Dec 2018 02:12:11 -0800
+Subject: [PATCH] Fix null pointer deref in qprint-encode filter (bug #77231)
+
+---
+ NEWS                                     |  4 ++++
+ ext/standard/filters.c                   |  2 +-
+ ext/standard/tests/filters/bug77231.phpt | 11 +++++++++++
+ 3 files changed, 16 insertions(+), 1 deletion(-)
+ create mode 100644 ext/standard/tests/filters/bug77231.phpt
+
+diff --git a/ext/standard/filters.c b/ext/standard/filters.c
+index dc7b0d86dcd3..9718a45be25e 100644
+--- a/ext/standard/filters.c
++++ b/ext/standard/filters.c
+@@ -928,7 +928,7 @@ static php_conv_err_t php_conv_qprint_encode_convert(php_conv_qprint_encode *ins
+ 			line_ccnt--;
+ 			CONSUME_CHAR(ps, icnt, lb_ptr, lb_cnt);
+ 		} else {
+-			if (line_ccnt < 4) {
++			if (line_ccnt < 4 && inst->lbchars != NULL) {
+ 				if (ocnt < inst->lbchars_len + 1) {
+ 					err = PHP_CONV_ERR_TOO_BIG;
+ 					break;
+diff --git a/ext/standard/tests/filters/bug77231.phpt b/ext/standard/tests/filters/bug77231.phpt
+new file mode 100644
+index 000000000000..17967ee80fc5
+--- /dev/null
++++ b/ext/standard/tests/filters/bug77231.phpt
+@@ -0,0 +1,11 @@
++--TEST--
++Bug #77231 (Segfault when using convert.quoted-printable-encode filter)
++--FILE--
++<?php
++var_dump(file(urldecode('php://filter/convert.quoted-printable-encode/resource=data://,%bfAAAAAAAAFAAAAAAAAAAAAAA%ff%ff%ff%ff%ff%ff%ff%ffAAAAAAAAAAAAAAAAAAAAAAAA')));
++?>
++--EXPECT--
++array(1) {
++  [0]=>
++  string(74) "=BFAAAAAAAAFAAAAAAAAAAAAAA=FF=FF=FF=FF=FF=FF=FF=FFAAAAAAAAAAAAAAAAAAAAAAAA"
++}
+\ No newline at end of file
diff --git a/php.spec b/php.spec
index b072c74..47fc910 100644
--- a/php.spec
+++ b/php.spec
@@ -140,7 +140,7 @@
 Summary: PHP scripting language for creating dynamic web sites
 Name: %{?scl_prefix}php
 Version: 5.5.38
-Release: 9%{?dist}
+Release: 10%{?dist}
 # All files licensed under PHP version 3.01, except
 # Zend is licensed under Zend
 # TSRM is licensed under BSD
@@ -250,6 +250,9 @@ Patch154: bug69090.patch
 Patch155: bug73549.patch
 Patch156: bug75981.patch
 Patch157: bug76582.patch
+Patch158: bug77153.patch
+Patch159: bug77020.patch
+Patch160: bug77231.patch
 
 # Security fixes (200+)
 
@@ -999,7 +1002,11 @@ support for using the enchant library to PHP.
 %patch154 -p1 -b .bug69090
 %patch155 -p1 -b .bug73549
 %patch156 -p1 -b .bug75981
-%patch157 -p1 -b .bug75981
+%patch157 -p1 -b .bug76582
+%patch158 -p1 -b .bug77153
+%patch159 -p1 -b .bug77020
+%patch160 -p1 -b .bug77231
+
 : ------------------------
 
 # Fixes for tests
@@ -1911,6 +1918,14 @@ EOF
 
 
 %changelog
+* Mon Dec 10 2018 Remi Collet <remi@remirepo.net> - 5.5.38-10
+- Fix #77231 Segfault when using convert.quoted-printable-encode filter
+- Fix #77020 null pointer dereference in imap_mail
+  CVE-2018-19935
+- Fix #77153 imap_open allows to run arbitrary shell commands via
+  mailbox parameter
+  CVE-2018-19158
+
 * Fri Sep 14 2018 Remi Collet <remi@remirepo.net> - 5.5.38-9
 - fix #76582: XSS due to the header Transfer-Encoding: chunked