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From 7cb160efe19d3dfb8b92629805733ea186b55050 Mon Sep 17 00:00:00 2001
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From: "Christoph M. Becker" <cmbecker69@gmx.de>
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Date: Mon, 31 Oct 2022 17:20:23 +0100
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Subject: [PATCH] Fix #81740: PDO::quote() may return unquoted string
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`sqlite3_snprintf()` expects its first parameter to be `int`; we need
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to avoid overflow.
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(cherry picked from commit 921b6813da3237a83e908998483f46ae3d8bacba)
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---
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ext/pdo_sqlite/sqlite_driver.c | 3 +++
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ext/pdo_sqlite/tests/bug81740.phpt | 17 +++++++++++++++++
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2 files changed, 20 insertions(+)
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create mode 100644 ext/pdo_sqlite/tests/bug81740.phpt
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diff --git a/ext/pdo_sqlite/sqlite_driver.c b/ext/pdo_sqlite/sqlite_driver.c
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index 0595bd09fe..54f9d05e1e 100644
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--- a/ext/pdo_sqlite/sqlite_driver.c
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+++ b/ext/pdo_sqlite/sqlite_driver.c
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@@ -233,6 +233,9 @@ static char *pdo_sqlite_last_insert_id(pdo_dbh_t *dbh, const char *name, size_t
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/* NB: doesn't handle binary strings... use prepared stmts for that */
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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 )
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{
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+ if (unquotedlen > (INT_MAX - 3) / 2) {
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+ return 0;
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+ }
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*quoted = safe_emalloc(2, unquotedlen, 3);
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sqlite3_snprintf(2*unquotedlen + 3, *quoted, "'%q'", unquoted);
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*quotedlen = strlen(*quoted);
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diff --git a/ext/pdo_sqlite/tests/bug81740.phpt b/ext/pdo_sqlite/tests/bug81740.phpt
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new file mode 100644
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index 0000000000..99fb07c304
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--- /dev/null
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+++ b/ext/pdo_sqlite/tests/bug81740.phpt
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@@ -0,0 +1,17 @@
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+--TEST--
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+Bug #81740 (PDO::quote() may return unquoted string)
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+--SKIPIF--
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+
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+if (!extension_loaded('pdo_sqlite')) print 'skip not loaded';
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+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
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+?>
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+--INI--
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+memory_limit=-1
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+--FILE--
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+
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+$pdo = new PDO("sqlite::memory:");
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+$string = str_repeat("a", 0x80000000);
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+var_dump($pdo->quote($string));
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+?>
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+--EXPECT--
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+bool(false)
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