From 7cb160efe19d3dfb8b92629805733ea186b55050 Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Mon, 31 Oct 2022 17:20:23 +0100
Subject: [PATCH 1/2] Fix #81740: PDO::quote() may return unquoted string

`sqlite3_snprintf()` expects its first parameter to be `int`; we need
to avoid overflow.

(cherry picked from commit 921b6813da3237a83e908998483f46ae3d8bacba)
---
 ext/pdo_sqlite/sqlite_driver.c     |  3 +++
 ext/pdo_sqlite/tests/bug81740.phpt | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 ext/pdo_sqlite/tests/bug81740.phpt

diff --git a/ext/pdo_sqlite/sqlite_driver.c b/ext/pdo_sqlite/sqlite_driver.c
index 0595bd09feb..54f9d05e1e2 100644
--- a/ext/pdo_sqlite/sqlite_driver.c
+++ b/ext/pdo_sqlite/sqlite_driver.c
@@ -233,6 +233,9 @@ static char *pdo_sqlite_last_insert_id(pdo_dbh_t *dbh, const char *name, size_t
 /* NB: doesn't handle binary strings... use prepared stmts for that */
 static int sqlite_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unquotedlen, char **quoted, size_t *quotedlen, enum pdo_param_type paramtype )
 {
+	if (unquotedlen > (INT_MAX - 3) / 2) {
+		return 0;
+	}
 	*quoted = safe_emalloc(2, unquotedlen, 3);
 	sqlite3_snprintf(2*unquotedlen + 3, *quoted, "'%q'", unquoted);
 	*quotedlen = strlen(*quoted);
diff --git a/ext/pdo_sqlite/tests/bug81740.phpt b/ext/pdo_sqlite/tests/bug81740.phpt
new file mode 100644
index 00000000000..99fb07c3048
--- /dev/null
+++ b/ext/pdo_sqlite/tests/bug81740.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #81740 (PDO::quote() may return unquoted string)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo_sqlite')) print 'skip not loaded';
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
+--INI--
+memory_limit=-1
+--FILE--
+<?php
+$pdo = new PDO("sqlite::memory:");
+$string = str_repeat("a", 0x80000000);
+var_dump($pdo->quote($string));
+?>
+--EXPECT--
+bool(false)
-- 
2.38.1

From 7328f3a0344806b846bd05657bdce96e47810bf0 Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@remirepo.net>
Date: Mon, 19 Dec 2022 09:24:02 +0100
Subject: [PATCH 2/2] NEWS

---
 NEWS | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/NEWS b/NEWS
index 8a8c0c9285d..03e8c839c77 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,12 @@
 PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
+Backported from 8.0.27
+
+- PDO/SQLite:
+  . Fixed bug #81740 (PDO::quote() may return unquoted string).
+    (CVE-2022-31631) (cmb)
+
 03 Nov 2022, PHP 7.4.33
 
 - GD:
-- 
2.38.1